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排序方式: 共有71条查询结果,搜索用时 46 毫秒
1.
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
2.
We propose a numerical simulation technique to model the process of diffusional creep and stress relaxation that occurs in
Cu-damascene interconnects of integrated circuit devices in processing stage. The mass flow problem is coupled to the stress
analysis through vacancy flux and equilibrium vacancy concentration. The technique is implemented in a software package that
seamlessly integrates the problem-oriented code with commercially available finite element program MSC.Marc. It is utilized
to model the Coble creep phenomenon by introducing the nanoscale grain boundary region having the thickness on the order of
several layers of atoms. As an illustration, the two-dimensional problem of stress relaxation in a single grain subjected
to prescribed displacements and tractions is examined. 相似文献
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5.
Enhanced Vertical Charge Transport in a Semiconducting P3HT Thin Film on Single Layer Graphene
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Vasyl Skrypnychuk Nicolas Boulanger Victor Yu Michael Hilke Stefan C. B. Mannsfeld Michael F. Toney David R. Barbero 《Advanced functional materials》2015,25(5):664-670
The crystallization and electrical characterization of the semiconducting polymer poly(3‐hexylthiophene) (P3HT) on a single layer graphene sheet is reported. Grazing incidence X‐ray diffraction revealed that P3HT crystallizes with a mixture of face‐on and edge‐on lamellar orientations on graphene compared to mainly edge‐on on a silicon substrate. Moreover, whereas ultrathin (10 nm) P3HT films form well oriented face‐on and edge‐on lamellae, thicker (50 nm) films form a mosaic of lamellae oriented at different angles from the graphene substrate. This mosaic of crystallites with π–π stacking oriented homogeneously at various angles inside the film favors the creation of a continuous pathway of interconnected crystallites, and results in a strong enhancement in vertical charge transport and charge carrier mobility in the thicker P3HT film. These results provide a better understanding of polythiophene crystallization on graphene, and should help the design of more efficient graphene based organic devices by control of the crystallinity of the semiconducting film. 相似文献
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Igor Guz Oleksandr Menshykov Vasyl Menshykov 《International Journal of Fracture》2006,140(1-4):277-284
We considers application of boundary integral equations to the problem of an interface crack between two elastic half-spaces
with different mechanical properties under dynamic loading. The derived system of equations allows evaluation of the displacements
at the crack faces, and the traction and the displacements at the interface. 相似文献
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9.
Bilousova N. А. Herasymenko Yu. S. Red’ko R. М. Vasyl’ev H. S. Vorobiova V. І. 《Materials Science》2020,55(6):831-839
Materials Science - We study the combined action of reagents and ultrasound on corrosion and scaling under the conditions of operation of water-heating equipment at a temperature of 95 ±... 相似文献
10.
Yannic Kerkhoff Latifeh Azizi Vasyl V. Mykuliak Vesa P. Hytönen Stephan Block 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(14):2206713
Several techniques have been established to quantify the mechanicals of single molecules. However, most of them show only limited capabilities of parallelizing the measurement by performing many individual measurements simultaneously. Herein, a microfluidics-based single-molecule force spectroscopy method, which achieves sub-nanometer spatial resolution and sub-piconewton sensitivity and is capable of simultaneously quantifying hundreds of single-molecule targets in parallel, is presented. It relies on a combination of total internal reflection microscopy and microfluidics, in which monodisperse fluorescent beads are immobilized on the bottom of a microfluidic channel by macromolecular linkers. Application of a flow generates a well-defined shear force acting on the beads, whereas the nanomechanical linker response is quantified based on the force-induced displacement of individual beads. To handle the high amount of data generated, a cluster analysis which is capable of a semi-automatic identification of measurement artifacts and molecular populations is implemented. The method is validated by probing the mechanical response polyethylene glycol linkers and binding strength of biotin–NeutrAvidin complexes. Two energy barriers (at 3 and 5.7 Å, respectively) in the biotin–NeutrAvidin interaction are resolved and the unfolding behavior of talin's rod domain R3 in the force range between 1 to ≈10 pN is probed. 相似文献