Novel insight into dry sliding behavior of Cu-Pb-Sn in-situ composite with secondary phase in different morphology
Novel insight into dry sliding behavior of Cu-Pb-Sn in-situ composite with secondary phase in different morphology
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对具有不同形态第二相的 Cu-Pb-Sn 原位复合材料干滑动行为的新见解
DOI：
10.1016/j.jmst.2019.09.025
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发表时间：
2020-03-01
影响因子：
10.9
通讯作者：
Li, T. J.
中科院分区：
文献类型：
--
作者：
Dong, B. W.;Wang, S. H.;Li, T. J.
不同形状富Pb第二相颗粒(SPPs)的Cu-24Pb-xSn (wt%) (x = 0, 2, 4, 6)合金表现出明显不同的力学性能和自润滑性能。揭示了SPP形状差异对合金机械和自润滑性能的影响。具有连续网状表面等离子体激元的Cu-24Pb合金在干滑动过程中表现出比其他三种具有独立棒状表面等离子体激元的合金更强烈的粘滑现象。这主要是由于网状SPP的分裂基质导致润滑不足造成的。添加Sn后，SPPs从网状转变为棒状，粘滑现象显着减弱，这被证明与棒状SPPs合金更高的自润滑性能有关。同时，随着Sn含量的增加，Cu-24Pb-xSn合金的延展性和拉伸强度同时增加，这是因为网状SPPs被棒状SPPs取代后，其劈裂行为会减弱。 (C) 2019 由 Elsevier Ltd 代表《Journal of Materials Science & Technology》编辑部出版。
The Cu-24Pb-xSn (wt%) (x = 0, 2, 4, 6) alloys with Pb-rich second-phase particles (SPPs) in different shapes show obviously differently mechanical and self-lubricating properties. The influence of the SPPs' shape difference on the alloys' mechanical and self-lubricating properties was revealed. Cu-24Pb alloy with continuously netty SPPs shows much more intensive stick-slip phenomenon during dry sliding than the other three alloys with independently rodlike SPPs. That is mainly due to insufficient lubrication resulted by the netty SPPs' splitting matrix. With the SPPs transforming from netty to rodlike shape under the addition of Sn, the stick-slip phenomenon was notably weakened, which was proven to be related to the higher self-lubricating property of alloys with rodlike SPPs. Simultaneously, the simultaneous increase of ductility and tensile strength was observed in the Cu-24Pb-xSn alloys with increasing Sn content, which is because the netty SPPs' splitting behavior will be weakened with them replaced by the rodlike SPPs. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.