首页|High energy braking behaviors and tribo-map constructions of Cu metal matrix composites with different Cr volume contents
High energy braking behaviors and tribo-map constructions of Cu metal matrix composites with different Cr volume contents
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NSTL
Elsevier
Cr, a promising abrasion component, has been introduced into Cu metal matrix composites (Cu-MMCs) to improve their high-energy braking performance. The Cu-Cr interfacial characteristics, worn surface/subsurface morphologies, and effect of Cr on the high energy braking behaviors of Cu-MMCs were measured in this study. The results indicate that an increase in Cr content prevented severe surface plastic deformation (0-5 vol. % Cr) and promoted the formation of mechanical mixed layer (MML) (15-20 vol % Cr), facilitated the improvement of wear resistance and the coefficient of friction, and reduced the thermal fade of composites. The main wear mechanism of the Cu-MMCs changed from adhesion (0-10 vol % Cr) or abrasion (10-20 vol % Cr) to delami-nation or mechanical mixing with an increase in braking energy density (BED). A series of corresponding friction, wear, and wear mechanism maps were established, which revealed the variation in the wear mechanism with the Cr content and BED.
Metal matrix compositesAbrasive componentTribological behaviorWear mechanismTribo-map
Haibin Zhou、Pingping Yao、Yelong Xiao、Kunyang Fan、Taiming Gong、Lin Zhao、Zhongyi Zhang、Minwen Deng、Yuxing Li
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State Key Laboratory of Powder Metallurgy, Central South University
School of Materials Science and Engineering, East China Jiaotong University
School of Mechanical Engineering, Chengdu University
NSTL
Elsevier
