共查询到18条相似文献,搜索用时 578 毫秒
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机械合金化制备金属间化合物机械合金化是一种用来制备过饱和固溶体、金属间化合物和非晶材料各种合金相的固态粉末工艺。该工艺减少了因两种金属熔点不同造成化合物成份分布不均匀现象。本实验用该种工艺合成了Ti-Al、Fe-Al、Nb-Al合金。用等静压方法加工... 相似文献
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机械合金化(MA)技术的新进展 总被引:9,自引:3,他引:9
论述了机械合金化技术的基本原理,介绍了机械合金化技术在弥散强化超合金、非晶态合金、磁性材料、超导合金、高熔点金属间化合物制备中应用的新进展。 相似文献
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Ni_3Al金属间化合物的研究进展 总被引:2,自引:0,他引:2
Ni3Al金属间化合物因具有熔点高、抗蠕变强度大、密度低、耐腐蚀、耐氧化以及其它优异性能,已被广泛应用于航空、冶金、机械、电化学、环保工业等领域,并有进一步发展的潜力和扩大应用的需求.该文对Ni3Al金属间化合物的制备及性能的研究进展进行综合评述,并着重论述粉末冶金法制备Ni3Al金属间化合物及其产品的抗氧化与催化性能等的研究现状. 相似文献
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机械合金化制备金属难熔化合物 总被引:2,自引:0,他引:2
在介绍机械合金化特点的同时,重点研究和讨论了机械合金化制备金属难熔化合物的过程及机理,并认为机械合金化是制备难熔化合物及其材料的一种行之有效的方法。 相似文献
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在介绍机械合金化特点的同时,重点研究和讨论了机械合金化制备金属难熔化合物的过程及机理,并认为机械合金化是制备难熔化合物及其材料的一种行之有效的方法。 相似文献
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机械合金化在Fe-Si合金制备中的应用 总被引:1,自引:0,他引:1
机械合金化是一种新的材料制备方法, 近年来在功能材料的制备中得到了广泛的应用. 该文简要回顾了机械合金化的发展历史, 阐述了机械合金化的原理及反应机制, 介绍了机械合金化技术在过饱和固溶体、非晶、纳米晶及金属间化合物等领域的应用状况. 指出机械合金化过程的热力学和动力学研究及合金相结构、性能与球磨工艺条件之间的规律是今后研究的重点, 后续处理工艺的改进是产品实现从实验室向工业应用转变的重要保证. 相似文献
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Lydia Y. Aguirre-Perales Robin A. L. Drew In-Ho Jung 《Metallurgical and Materials Transactions A》2014,45(9):3714-3727
The effect of in situ intermetallic formation on the foaming behavior of Al-3 wt pct Sn alloy has been investigated by introducing five different alloying elements—Co, Mg, Mn, Ni, and Ti. The alloying elements were designed, using thermodynamic calculations, to form various intermetallic phases which are (i) stable until final foaming temperature and (ii) dissolved during the foaming process. Thermal analysis using DSC was carried out to characterize the formation and dissolution of intermetallic phases during the foaming process. The foaming tests of the Al-3 wt pct Sn-X alloy were carried out using a mechanical expandometer and the macrostructure of the foam was scanned with an X-ray tomographer. It is found that the foaming behavior and foam stability of Al-3 wt pct Sn alloy can be actively controlled by the alloying elements. 相似文献
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Anna Knaislová Jiří Linhart Pavel Novák Filip Průša Jaromír Kopeček František Laufek 《粉末冶金学》2019,62(1):54-60
This work is devoted to the preparation of alloys based on intermetallic compounds in the Ti–Al–Si system by powder metallurgy using mechanical alloying and the spark plasma sintering (SPS) method. The aim was to describe the formation of intermetallic phases during mechanical alloying of TiAl15Si15 (wt-%) alloy and to consolidate the powder prepared by optimised conditions. Phase composition, microstructure and hardness of compacted alloy were determined. Four hours of mechanical alloying is sufficient time for preparation of pure elements free material composed only of intermetallic phases. After consolidation, the TiAl15Si15 alloy has a homogeneous structure composed of silicide (Ti5Si3) in aluminide (TiAl) matrix. The hardness of the material reaches 865?±?42 HV 5. 相似文献
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Paustovskii Alexander V. Alfintseva Raisa A. Kurinnaya Tatyana V. Pogorelaya Valentina V. Kirilenko Stepan N. 《Powder Metallurgy and Metal Ceramics》2004,43(5-6):251-257
The main parameters of electrospark alloying of steel 45 with anodes made from Ni – Cr – Al – Y alloys have been investigated. The anodes were fabricated by casting and hot pressing. The highest values of the mass transfer coefficient were observed in the case of electrospark alloying with hot-pressed alloys. Microstructure and x-ray phase analyses of electrospark coatings revealed the presence of solid solutions based on nickel, iron, chromium as well as intermetallic compounds. Coatings obtained by electrospark alloying with hot-pressed alloy are more wear-resistant than are coatings obtained by alloying with cast alloys. 相似文献
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La1.5Mg17Ni0.5 hydrogen storage materials were prepared by hydriding combustion synthesis (HCS) and mechanical alloying (MA) method respectively. The experimental results show that the hydrogen absorption properties of La1.5Mg17Nio.5 prepared by MA are better than that by HCS. La1.5Mg17Nio.5 prepared by MA can absorb 6.73 mass% hydrogen at 523 K within 1 min, and 4.92 mass% hydrogen at 423 K. The improvement of hydriding properties of La1.5Mg17Ni0.5alloy prepared by MA can be ascribed to the formation of nano-crystalline and defects during the mechanical alloying. 相似文献
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Podchernyaeva Irina A. Kostenko Alexei D. Guslienko Yurii A. Uvarova Irina V. 《Powder Metallurgy and Metal Ceramics》2004,43(1-2):35-38
The effect of layer-by-layer electric-spark alloying on the tribological parameters of a composite electrolytic coating of the system Ni – B is studied. It is shown that layer-by-layer electric-spark alloying with intermetallic TiAl and a composite AlN – ZrB2 halves coating wear and prevents transfer of coating material to the counterbody. The reason for this is formation of a graded structure for the surface layer including zircon ZrSiO4 and intermetallic TiAl. The latter is responsible for formation of β-tialite during tribological oxidation acting as a solid lubricant. 相似文献
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Mechanical alloying of nb-al powders 总被引:1,自引:0,他引:1
Zhixue Peng C. Suryanarayana F. H. Froes 《Metallurgical and Materials Transactions A》1996,27(1):41-48
The effect of mechanical alloying (MA) on solid solubility extension, nanostructure formation, amorphization, intermetallic
compound formation, and the occurrence of a face-centered cubic (fcc) phase in the Nb-Al system has been studied. Solid solubility
extension was observed in both the terminal compositions and intermetallic compounds: 15 pct Nb in Al and 60 pct Al in Nb,
well beyond the equilibrium and even rapid solidification levels (2.4 pct Nb and 25 pct Al, respectively) and increased homogeneity
range for the NbAl3 phase. Nanostructured grains formed in all compositions. In the central part of the phase diagram, amorphization occurred
predominantly. Only NbAl3, the most stable intermetallic, formed during MA; in most cases, a subsequent anneal was required. On long milling time,
an fcc phase, probably a nitride, formed as a result of contamination from the ambient atmosphere. 相似文献
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Mechanical properties and wear behaviour of PM aluminium composite reinforced with (Fe3Al) particles
《粉末冶金学》2013,56(3):247-250
AbstractMechanical properties and wear behaviour of an aluminium matrix composite reinforced with Fe3Al intermetallics have been studied. A 2014 alloy manufactured through mechanical alloying was used as the matrix. Three different Fe3Al intermetallics have been used as reinforcement, also manufactured through mechanical alloying. The difference between them was the different mechanical alloying times (5 and 20 h were used) and the possibility of carrying out a heat treatment at 1000°C (on the 20 h milled intermetallic) before admixing to the aluminium matrix. The processing of these composite materials included mixing and cold compacting (conventional powder metallurgy) followed by hot extrusion (without caning and degassing). The effect of a T6 heat treatment was also evaluated. The influence of intermetallic additions on the mechanical properties (hardness and tensile strength) and wear behaviour (pin on disk test) was established. All intermetallics showed a good link with the matrix, and high reactivity with it during the heat treatment, as the microstructural study supports. 相似文献
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NiAl金属间化合物的研究进展 总被引:4,自引:0,他引:4
对NiAl金属间化合物的国内外研究现状如改善NiAl合金力学性能和高温抗氧化性能等所 采用的合金化、制备多相合金、制备复合材料、定向凝固、机械合金化、热压及热等静压、燃烧合成、 微晶涂层等工艺以及NiAl合金的超塑性行为进行了系统综述,着重介绍并论述了合金化及定向 凝固等工艺。此外,还介绍了NiAl合金的固溶强化磁行为。 相似文献