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Influence of sulfides on the tribological properties of composites produced by pulse electric current sintering

International Journal of Minerals,Metallurgy and materials 2014年第1期21卷 95-103页

作者： Seung Ho Kim Department of Electronics Engineering Dankook University

Self-lubricating A1203-15wt% ZrO2 composites with sulfides, such as molybdenum disulfide （MoS2） and tungsten disulfide （WSz） serving as solid lubricants, were fabricated by using the pulse electric current sintering （PECS） technique. The coefficient of friction （COF） of the A1203-15wt% ZrO2 composite without/with sulfides was in the range of 0.37-0.48 and 0.27-0.49, respectively. As the amoant of sul- fides increased, the COF and the wear rate decreased. The reduction in COF and wear rate of the sulfide-containing composite is caused by a reduction in shear stresses between the specimen and the tribological medium due to the formation of a lubricating film resulting from the lamellar structure of sulfides located on the worn surface.

关键词： ceramic composites coefficient of friction solid lubricants sulfides wear of materials

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XPS INVESTIGATION OF NITROGEN IONS IMPLANTED INTO ALUMINUM ALLOY BY PLASMA BASED ION IMPLANTATION

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 771-776页

作者： Zhan, Z.J. Ma, X.X. Xia, L.F. Sun, Y. Harbin Inst of Technology Harbin China

Aluminum alloy 2024 has been implanted with nitrogen ions at various doses by plasma based ion implantation. The introduction of energetic ions causes structural change within the near surface region of the solid. The samples have been characterized by X-ray Photoelectron Spectroscopy at various depths. The chemical states of Al and N were identified by deconvolution of the recorded XPS spectra. After plasma based ion implanted nitrogen into aluminum, not only the AlN precipitates but also super saturated solution of nitrogen forms. The presence of aluminum in different chemical states is corresponding to Al, AlN and Al2O3. The majority of nitrogen is in the form of the supersaturated solution. With the increase of nitrogen dose, the amount of AlN precipitates increases.

关键词： Aluminum compounds Ion implantation Nitrides Nitrogen Plasma devices wear of materials

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基于人工智能技术的磨粒显微形态学分析(英文)

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Chinese Journal of Aeronautics 2001年第1期14卷 30-36页

作者：吴振锋左洪福郭琳 Civil Aviation College Nanjing University of Aeronautics and Astronautics Science and Technology Co. Nanjing University of Science and Technology

Based on the micro-morphology theory, the authors set up a set of feature descriptors of debris, use it to abstract the characteristic information of wearing particles, and identify them by the auto clustering, Artificial Neural Network (ANN) and other artificial intelligence (AI) means. The technique has found its application in the wearing fault diagnosis of aero-engines.

关键词： Artificial intelligence Failure (mechanical) Neural networks Space debris wear of materials

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