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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不同Cr含量铜金属基复合材料的高能制动行为和摩擦图结构

DOI:
10.1016/j.wear.2022.204275
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发表时间:
2022-02
期刊:
影响因子:
5
通讯作者:
Yuxing Li
Yuxing Li
中科院分区:
工程技术1区
文献类型:
--
作者:
Haibin Zhou;Pingping Yao;Yelong Xiao;Kunyang Fan;Taiming Gong;Lin Zhao;Zhongyi Zhang;Minwen Deng;Yuxing Li

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Cr是一种很有前景的磨损成分,已被引入到铜金属基复合材料(Cu-MMC)中,以提高其高能制动性能。本研究测量了 Cu-Cr 界面特性、磨损表面/亚表面形貌以及 Cr 对 Cu-MMC 高能制动行为的影响。结果表明,Cr含量的增加可以防止严重的表面塑性变形(0-5 vol.% Cr),促进机械混合层(MML)(15-20 vol.% Cr)的形成,有利于提高耐磨性和摩擦系数,并减少复合材料的热褪色。随着制动能量密度 (BED) 的增加,Cu-MMC 的主要磨损机制从粘附 (0–10 vol % Cr) 或磨损 (10–20 vol % Cr) 转变为分层或机械混合。建立了一系列相应的摩擦、磨损和磨损机理图,揭示了磨损机理随Cr含量和BED的变化。
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 delamination 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.
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