共查询到20条相似文献,搜索用时 15 毫秒
1.
B. Vamsi Krishna V. N. Misra P. S. Mukherjee Puneet Sharma 《International Journal of Refractory Metals and Hard Materials》2002,20(5-6):355-374
This article reports on feasibility experiments carried out with oxy-acetylene spray system with various oxygen to fuel ratios using two different tungsten carbide powders and powder feeding methods, to evaluate the newly developed fused WC, synthesised by transferred arc thermal plasma method. Transferred arc thermal plasma method is more economical and less energy intensive than the conventional arc method and results in a fused carbide powder with higher hardness. The microstructure and phase composition of powders and coatings were analysed by optical and scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. Carbon content of the powders and coatings were determined to study the decarburisation of the material during spraying process. Coatings were also characterised by their hardness and abrasive wear. The effects of metallurgical transformation and phase content are related to wear performance. The results demonstrate that the powders exhibit various degree of phase transformation during the spray process depending on the type of powder, powder feeding and spray parameters. The carbon loss during the spray process in excess of 45% resulted in reduced hardness and wear resistance of the coatings. Coatings with high amount of WC and W2C along with FeW3C showed higher wear resistance. Thus, coatings of high wear resistance can be produced using fused tungsten carbide powder with WC and W2C phases, which can be economically synthesised by thermal plasma transferred arc method. 相似文献
2.
Shunyan Tao Bo Liang Chuanxian Ding Hanlin Liao Christian Coddet 《Journal of Thermal Spray Technology》2005,14(4):518-523
Reconstituted nanostructured and conventional yttria partially stabilized zirconia coatings were deposited by atmospheric
plasma spray. The tribologic properties of the coatings against 100C6 steel were evaluated with a ball-on-disc configuration
under dry friction conditions at room temperature. Microstructure and the phase composition of the powders and the coatings
were examined using a scanning electron microscope, optical microscope, and x-ray diffraction. Microhardness and the Young’s
modulus of coatings were measured by indentation testing. Results showed that the wear resistance of the coatings produced
using the nanostructured powder is improved compared with the coating produced using the conventional powder. The wear rates
of nanostructured zirconia coatings are about four-fifths of those of conventional counterparts under a load of 5 N. The wear
mechanism is also discussed.
The original version of this paper was published as part of the DVS Proceedings: “Thermal Spray Solutions: Advances in Technology
and Application,” International Thermal Spray Conference, Osaka, Japan, 10–12 May 2004, CD-Rom, DVS-Verlag GmbH, Düsseldorf,
Germany. 相似文献
3.
Carl Christoph Stahr Sabine Saaro Lutz-Michael Berger Jiri Dubský Karel Neufuss Mathias Herrmann 《Journal of Thermal Spray Technology》2007,16(5-6):822-830
A phase change from α-alumina (corundum) in the feedstock powder to predominantly other alumina phases, such as γ-alumina
in the coating normally takes place, as a result of the spray process. It is expected that the prevention of this phase transformation
will significantly improve the mechanical, electrical, and other properties of thermally sprayed alumina coatings. The results
regarding the possibility of stabilization of α-alumina through addition of chromia published in the literature are ambiguous.
In this work, stabilization using different spray processes (water-stabilized plasma (WSP), gas-stabilized plasma (APS), and
high-velocity oxy-fuel spray (HVOF)) was studied. Mechanical mixtures of alumina and chromia were used, as were prealloyed
powders consisting of solid solutions. The investigations focused on mechanical mixtures with both APS and WSP and on prealloyed
powders with WSP. The coatings were studied by x-ray diffraction, including Rietveld analysis, and analysis of the lattice
parameters. Microstructures were investigated by optical microscopy using metallographic cross-sections. It was shown that
in the case of the mechanically mixed powders, the stabilization predominantly depends on the applied spray process. The stabilization
of the α phase by use of the WSP process starting from mechanical mixtures was confirmed. It appears that stabilization exhibits
a complex dependence on the spray process, the process parameters (in particular the thermal history), the nature of the powder
(mechanically mixed or prealloyed), and the chromia content.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
4.
L. C. Erickson T. Troczynski H. M. Hawthorne H. Tai D. Ross 《Journal of Thermal Spray Technology》1999,8(3):421-426
A series of plasma sprayed coatings of controlled microstructure was obtained by spraying three monosize sapphire powders
using an axial injection torch in which the plasma gas composition and nozzle diameter were the only processing parameters
varied. The effects of changes in these parameters on the coating splat morphology, porosity, angular crack distribution,
and hardness are reported. The uniform, dense microstructure and the high hardness of 14 GPa (a level usually only associated
with chromia thermal spray coatings) of the best alumina coatings resulted from using tightly controlled processing conditions
and monodispersed precursor powders. The microstructural quality of plasma sprayed coatings and, hence, the coating properties
can be improved significantly by minimizing variations in processing and raw material parameters.
This paper originally appeared in Thermal Spray: Meeting the Challenges of the 21st Century; Proceedings of the 15th International Thermal Spray Conference, C. Coddet, Ed., ASM International, Materials Park, OH, 1998. This proceedings paper has been extensively reviewed according
to the editorial policy of the Journal of Thermal Spray Technology. 相似文献
5.
Perovskite-type LaMnO3 powders and coatings have been prepared by a novel technique: reactive suspension plasma spraying (SPS) using an inductively
coupled plasma of approximately 40 kW plate power and an oxygen plasma sheath gas. Suitable precursor mixtures were found
on the basis of solid state reactions, solubility, and the phases obtained during the spray process. Best results were achieved
by spraying a suspension of fine MnO2 powder in a saturated ethanol solution of LaCl3 with a 1 to 1 molar ratio of lanthanum and manganese. A low reactor pressure was helpful in diminishing the amount of corrosive
chlorine compounds in the reactor. As-sprayed coatings and collected powders showed perovskite contents of 70 to 90%. After
a posttreatment with an 80% oxygen plasma, an almost pure LaMnO3 deposit was achieved in the center of the incident plasma jet.
This paper originally appeared in Thermal Spray: Meeting the Challenges of the 21st Century; Proceedings of the 15th International Thermal Spray Conference, C. Coddet, Ed., ASM International, Materials Park, OH, 1998. This proceedings paper has been extensively reviewed according
to the editorial policy of the Journal of Thermal Spray Technology. 相似文献
6.
We studied the resistance of the coatings to abrasive and unlubricated sliding wear of 40 WC/Co coatings applied by high velocity
oxygen fuel (HVOF), high-energy plasma spray (HEPS), and high velocity plasma spray (HVPS), using commercial and nanostructured
experimental powders. The hardness of the coatings varies from 3 to 13 GPA, which is much lower than that of sintered samples
(10 to 23 GPA) because of the porosity of the coatings. Phase analysis by x-ray diffraction revealed various amounts of decarburization
in the coatings, some of which contain WC, W2C, W, and η phase. The abrasive and sliding wear resistance is limited by the hardness of the samples. For a given hardness,
the wear resistance is lowered by decarburization, which produces a hard but brittle phase. Nanocarb powders have the shape
of thin-walled hollow spheres that heat up rapidly in the gun and are more prone to decarburization than commercial materials.
The work shows that, in order to obtain the performance of nanostructured coatings, the powder and spray techniques must be
modified. 相似文献
7.
The radial injection gas dynamic spray (RIGDS) technology of powder coatings deposition was considered for this work. A coating
was created by injecting powders with variable compositions into a supersonic air jet and depositing powder on the substrate.
This study describes the preliminary analysis of an air gas dynamic spray method realized by a portable RIGDS apparatus with
a radial injection of powder. Attention was given to shock compaction processes during the coating structure formation and
examples of powder mixtures utilization in RIGDS. It was shown that the operational parameters of supersonic powder-gas jet
have a significant influence on the coating's microstructure, thus defining the high performance of the coating. Compaction
and bonding of particles were analyzed.
The original version of this paper was published in the CD ROM Thermal Spray Connects: Explore Its Surfacing Potential, International Thermal Spray Conference, sponsored by DVS, ASM International, and HW International Institute of Welding,
Basel, Switzerland, May 2–4, 2005, DVS-Verlag GmbH, Düsseldorf, Germany. 相似文献
8.
The high velocity oxy-fuel (HVOF) spray process has been primarily used for the application of wear-resistant coatings and,
with the introduction of new, more powerful systems, is being increasingly considered for producing corrosion-resistant coatings.
In this study, the influence of various spray parameters for the JP-5000 and Diamond Jet (DJ) Hybrid systems on the oxidation
of stainless steel 316L is characterized. Experimental results reveal that coating oxygen contents of less than 1 wt.% can
be more easily attained with the JP-5000 than the DJ Hybrid systems because of the former’s design. In both cases, however,
the low particle temperatures necessary for low oxygen content coatings may impair bond and cohesive strength. Heat treating
the coatings after processing reduces hardness, metallurgically enhances bond strength, and enables the spheroidization of
oxide layers surrounding unmelted particles.
An empirical model describing oxidation in the thermal spray process was expanded to explain the oxidation in the HVOF spraying
of stainless steel. It was concluded that for these oxygen-sensitive materials, maintaining a relatively low particle temperature
throughout the spray process minimizes oxygen pickup by preventing an autocatalytic oxidation process and particle fragmentation
upon impact. For the DJ Hybrid systems, understoichiometric fuel settings are selected, whereas for the JP-5000, oxygen-rich
mixtures are preferred. 相似文献
9.
High-velocity oxyfuel (HVOF) spraying of WC-12Co was performed using a feedstock in which the WC phase was either principally
in the micron size range (conventional) or was engineered to contain a significant fraction of nanosized grains (multimodal).
Three different HVOF systems and a wide range of spray parameter settings were used to study the effect of in-flight particle
characteristics on coating properties. A process window with respect to particle temperature was identified for producing
coatings with the highest resistance to dry abrasion. Although the use of a feedstock containing a nanosized WC phase produced
harder coatings, there was little difference in the abrasion resistance of the best-performing conventional and multimodal
coatings. However, there is a potential benefit in using the multimodal feedstock due to higher deposition efficiencies and
a larger processing window.
The original version of this article was published as part of the ASM Proceedings, Thermal Spray 2003: Advancing the Science and Applying the Technology, International Thermal Spray Conference (Orlando, FL), May 5–8, 2003, Basil R. Marple and Christian Moreau, Ed., ASM International,
2003. 相似文献
10.
Vasyl Pokhmurskii Hrygorij Nykyforchyn Mykhajlo Student Mykhajlo Klapkiv Hanna Pokhmurska Bernhard Wielage Thomas Grund Andreas Wank 《Journal of Thermal Spray Technology》2007,16(5-6):998-1004
Different posttreatment methods, such as heat treatment, mechanical processing, sealing, etc., are known to be capable to
improve microstructure and exploitation properties of thermal spray coatings. In this work, a plasma electrolytic oxidation
of aluminum coatings obtained by arc spraying on aluminum and carbon steel substrates is carried out. Microstructure and properties
of oxidized layers formed on sprayed coating as well as on bulk material are investigated. Oxidation is performed in electrolyte
containing KOH and liquid glass under different process parameters. It is shown that thick uniform oxidized layers can be
formed on arc-sprayed aluminum coatings as well as on solid material. Distribution of alloying elements and phase composition
of obtained layers are investigated. A significant improvement of wear resistance of treated layers in two types of abrasive
wear conditions is observed.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
11.
Plasma sprayed cast iron coatings containing solid lubricant graphite and h-BN structure 总被引:1,自引:0,他引:1
Water-atomized cast iron powder of Fe-2.17 at.%C-9.93at.%Si-3.75at.%Al were deposited onto an aluminum alloy substrate by
atmospheric direct current plasma spraying to improve its tribological properties. Preannealing of the cast iron powder allows
the precipitation of considerable amounts of graphite structure in the powder. However, significant reduction in graphitized
carbon in cast iron coatings is inevitable after plasma spraying in air atmosphere due to the in-flight burning and dissolution
into molten iron droplets. Hexagonal boron nitride (h-BN) powders, which have excellent lubricating properties like graphite,
were incorporated into the cast iron powder as a solid lubricant by the sintering process (1300°C) to obtain protective coatings
with a low friction coefficient. The performance of each coating was evaluated using a ring-on-disk-type wear tester under
a paraffin-based oil condition in an air atmosphere. A conventional cast iron liner, which had a flaky graphite embedded in
the pearlitic matrix, was also tested under similar conditions for comparison. Sections of worn surfaces and debris were characterized,
and the wear behavior of plasma-sprayed coatings was discussed.
The original version of this paper was published in the CD ROM Thermal Spray Connects: Explore Its Surfacing Potential, International Thermal Spray Conference, sponsored by DVS, ASM International, and HW International Institute of Welding,
Basel, Switzerland, May 2–4, 2005, DVS-Verlag GmbH, Düsseldorf, Germany. 相似文献
12.
In previous studies, it has been demonstrated that nanostructured Al2O3-13 wt.%TiO2 coatings deposited via air plasma spray (APS) exhibit higher wear resistance when compared to that of conventional coatings.
This study aimed to verify if high-velocity oxy-fuel (HVOF)-sprayed Al2O3-13 wt.%TiO2 coatings produced using hybrid (nano + submicron) powders could improve even further the already recognized good wear properties
of the APS nanostructured coatings. According to the abrasion test results (ASTM G 64), there was an improvement in wear performance
by a factor of 8 for the HVOF-sprayed hybrid coating as compared to the best performing APS conventional coating. When comparing
both hybrid and conventional HVOF-sprayed coatings, there was an improvement in wear performance by a factor of 4 when using
the hybrid material. The results show a significant antiwear improvement provided by the hybrid material. Scanning electron
microscopy (SEM) at low/high magnifications showed the distinctive microstructure of the HVOF-sprayed hybrid coating, which
helps to explain its excellent wear performance.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
13.
Eric Irissou Jean-Gabriel Legoux Bernard Arsenault Christian Moreau 《Journal of Thermal Spray Technology》2007,16(5-6):661-668
Coating build-up mechanisms and properties of cold-sprayed aluminum-alumina cermets were investigated using two spherical
aluminum powders having average diameters of 36 and 81 μm. Those powders were blended with alumina at several concentrations.
Coatings were produced using a commercial low-pressure cold spray system. Powders and coatings were characterized by electronic
microscopy and microhardness measurements. In-flight particle velocities were monitored for all powders. The deposition efficiency
was measured for all experimental conditions. Coating performance and properties were investigated by performing bond strength
test, abrasion test, and corrosion tests, namely, salt spray and alternated immersion in saltwater tests. These coating properties
were correlated to the alumina fraction either in the starting powder or in the coating.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
14.
New attachment for controlling gas flow in the HVOF process 总被引:1,自引:0,他引:1
During the decade, the high-velocity oxyfuel (HVOF) process proved to be a technological alternative to the many conventional
thermal spray processes. It would be very advantageous to design a nozzle that provides improved performance in the areas
of deposition efficiency, particle in-flight oxidation, and flexibility to allow deposition of ceramic coatings. Based on
a numerical analysis, a new attachment to a standard HVOF torch was modeled, designed, tested, and used to produce thermal
spray coatings according to the industrial needs mentioned above. Performance of the attachment was investigated by spraying
several coating materials including metal and ceramic powders. Particle conditions and spatial distribution, as well as gas
phase composition, corresponding to the new attachment and the standard HVOF gun, were compared. The attachment provides better
particle spatial distribution, combined with higher particle velocity and temperature.
The original version of this article was published as part of the ASM Proceedings, Thermal Spray 2003: Advancing the Science and Applying the Technology, International Thermal Spray Conference (Orlando, FL), 5–8 May, 2003, Basil R. Marple and Christian Moreau, Ed., ASM International,
2003. 相似文献
15.
Dowon Seo Kazuhiro Ogawa Tetsuo Shoji Shozo Murata 《Journal of Thermal Spray Technology》2007,16(5-6):954-966
The effect of particle size distribution on the degradation behavior of plasma sprayed CoNi- and CoCrAlY coatings during isothermal
oxidation was investigated, in terms of the oxygen content, porosity, surface roughness, and oxide scale formation. The results
show that the degradation of both coatings was considerably influenced by the starting particle size distribution. It also
shows that in the as-sprayed vacuum plasma spray (VPS) coatings the oxygen content on the coating surface increased significantly
with decreased average particle size. But after thermal exposure, the difference of the oxygen contents between the coatings
with different particle size was decreased. The powder with various particle size resulted in low porosity inside the coatings
during the deposition process. The surface roughness of the coatings increased with increased particle size. The small particles
produced a relatively smooth surface, and the oxide growth in the coating deposited by small particle was slower than that
in the large particle coating.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
16.
L. Ajdelsztajn A. Zúñiga B. Jodoin E. J. Lavernia 《Journal of Thermal Spray Technology》2006,15(2):184-190
This work describes recent progress in cold-spray processing of conventional and nanocrystalline 2618 (Al−Cu−Mg−Fe−Ni) aluminum
alloy containing scandium (Sc). As-atomized and cryomilled 2618+Sc aluminum powder were sprayed onto aluminum substrates.
The mechanical behavior of the powders and the coatings were studied using micro-and nanoindentation techniques, and the microstructure
was analyzed using scanning and transmission electron microscopy (SEM and TEM). The influence of powder microstructure, morphology,
and behavior during deposition on the coating properties was analyzed. This work shows that Al−Cu−Mg−Fe−Ni−Sc coatings with
a nanocrystalline grain structure can be successfully produced by the cold-spray process. Inspection of the scientific literature
suggests that this is the first time a hardness value of 181 HV has been reported for this specific alloy.
The original version of this paper was published in the CD ROM Thermal Spray Connects: Explore Its Surfacing Potential, International Thermal Spray Conference, sponsored by DVS, ASM International, and IIW International Institute of Welding,
Basel, Switzerland, May 2–4, 2005, DVS-Verlag GmbH, Düsseldorf, Germany. 相似文献
17.
The high velocity air fuel (HVAF) system is a high-velocity combustion process that uses compressed air and kerosene for combustion.
Two WC-cermet powders were sprayed by the HVAF and the high-velocity oxyfuel (HVOF) processes, using an AeroSpray gun (Browning
Thermal Systems Inc., Enfield, New Hampshire) and a CDS-100 gun (Sulzer Plasma Technik, Wohlen, Switzerland) respectively.
Several techniques, including x-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy, were used
to characterize the microstructures and phase distribution of the powders and coatings. In addition, mechanical properties
such as hardness and wear resistance (pin-on-disk) were investigated. A substantial amount of W2C was found in the HVOF coatings, as well as a high concentration of tungsten in the binder phase, indicating that oxidation
and dissolution processes change the composition and microstructure from powder to coating during spraying. This was in contrast
to the HVAF coatings in which composition and microstructure were unchanged from that of the powder. Additionally, the wear
resistance of the HVAF coatings was superior to that of the HVOF coatings. 相似文献
18.
This research delivers a generic understanding of the design and integrated performance of the coating-substrate systems under
impact loading, and comprehends the understanding of underpinning failure mechanisms. Repeated severe impacts to the coatings
often result in poor performance by cracking and delamination from the coating-substrate interface. The durability of coatings
thus depends on the choice of coating and substrate materials, coating deposition process, and service conditions. The design
of thermal spray coatings thus requires an optimization of these parameters. This investigation provides insight into the
role of coating and substrate properties on the impact resistance of coated materials, and maps the relationship between the
impact resistance of WC cermet coatings on a variety of substrates. Results indicate that the delamination resistance of the
coating during impact loading not only depends upon the hardness and roughness of the substrate material, but, more importantly,
substrates with a higher work-hardening coefficient indicate a higher delamination resistance.
The original version of this paper was published as part of the DVS Proceedings: “Thermal Spray Solutions: Advances in Technology
and Application,” International Thermal Spray Conference, Osaka, Japan, 10–12 May 2004, CD-Rom, DVS-Verlag GmbH, Düsseldorf,
Germany. 相似文献
19.
J. Wilden J. P. Bergmann S. Jahn S. Knapp F. van Rodijnen G. Fischer 《Journal of Thermal Spray Technology》2007,16(5-6):759-767
Nowadays, wire-arc spraying of chromium steel has gained an important market share for corrosion and wear protection applications.
However, detailed studies are the basis for further process optimization. In order to optimize the process parameters and
to evaluate the effects of the spray parameters DoE-based experiments had been carried out with high-speed camera shoots.
In this article, the effects of spray current, voltage, and atomizing gas pressure on the particle jet properties, mean particle
velocity and mean particle temperature and plume width on X46Cr13 wire are presented using an online process monitoring device.
Moreover, the properties of the coatings concerning the morphology, composition and phase formation were subject of the investigations
using SEM, EDX, and XRD-analysis. These deep investigations allow a defined verification of the influence of process parameters
on spray plume and coating properties and are the basis for further process optimization.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
20.
There has been an increase in interest of late regarding the properties of thermally sprayed WC-Co cermets with nanograin
carbide particles. These powders have shown interesting properties in sintered components, giving high values of hardness
(2200–2300 VHN) and improved wear properties. The method used for the processing for these materials—solution formation, spray
drying and chemical conversion, rather than introduction of WC as solid particles to a molten binder—allows the formation
of sub-100 nm WC particles as a hard second phase.
The work presented here examined the effect of composition on the microstructure and wear properties of some nanostructured
WC-Co materials. WC-Co cermets with 8, 10, 12, and 15% Co binder phase were deposited using a Sulzer Metco hybrid DJ HVOF
thermal spray system. Optimization of deposition conditions was necessary because of the unique morphology of the powders
(thick-shelled hollow spheres) to produce dense consolidated deposits.
There is a higher degree of decarburization of the WC phase in the nanostructured materials compared with the conventional
WC-Co. This dissolution of the hard phase is also noted to increase on decreasing binder phase content.
The nanostructured WC-Co coatings have a lower wear resistance compared with the conventional WC-Co for abrasive wear and
small particle erosion. The abrasive wear resistance of these nanostructured materials was found to increase on decreasing
cobalt binder content. This trend in abrasive wear resistance is consistent with studies on conventional sized cermets and
is believed to be more dependent upon proportion of binder phase content than degree of decarburization for the materials
studied. The small particle erosion resistance of the nanostructured coatings was found to increase on increasing cobalt content. 相似文献