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Friction of Alloys at High Temperature

journal of materials science & Technology 1994年第5期10卷 313-320页

作者： m.b.peterson (Wear sciences, 925 mallard Circle, Arnold maryland 21012, UsA)(To whom correspondence should be addressed)s.j.calab.ese (Rensselaer Polytechnic Institute, Troy, NY, UsA)shizhuo li and Xiaoxia jIANG (Institute of metal Research, Chinese Acad Wear sciences Arnold United States

A brief review is given about the friction and wear properties of high temperature alloys. Above a critical temperature, if the oxide becomes ductile, it will flow over the surface and prevent metal-to-metat contact. In order to study the tribology of oxide lubrication. a series of tests were carried out using Cu(ReO4)2 as a lubricant. The effects of time. surface finish. substrates. load and temperature were investigated. A mechanism of lubrication is proposed in which the surface slip predominates along with mechanical attachment of oxide to the surface.

关键词： Re Cu Friction of Alloys at High Temperature ADA Ni

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Wear-resisting Oxide Films for 900℃

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journal of materials science & Technology 1997年第2期13卷 99-106页

作者： m.b.peterson(Wear sciences Corporation, Arnold, maryland, UsA)shizhuo li(Institute of metal Research, Chinese Academy of sciences, shenyang 110015, China)s.F.murray(Rensselaer Polytechnic Institute, Thoy, New York, UsA)

A study was conducted to develop low-friction, wear-resistant surfaces on high temperature alloys for the temperature range from 26℃ to 900℃. The approach investigated consists of modifying the naturally occurring oxide film in order to improve its tribological properties. Improvement is needed at low temperatures where the oxide film, previously formed at high temperature, spalls due to stresses induced by sliding. Experiments with Ti, W and Ta additions show a beneficial effect when added to Ni and Ni-base alloys. Low friction can be maintained down to 100℃ from 900℃. For unalloyed Ni friction and surface damage increases at 400℃ to 500℃. Two new alloys were perpared based on the beneficial results of binary alloys and ZrO2 diffusion in *** friction at temperature above 500℃ and reasonable values (0.32~0.42) at low temperature are obtained.

关键词： Ni Cr Wear-resisting Oxide Films for 900 Ti

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