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论文类型：期刊论文

发表时间：2020-03-01

发表刊物：JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

收录刊物：EI、SCIE

卷号：40

页面范围：158-167

ISSN号：1005-0302

关键字：Second-phase particles; Netty shape; Rodlike shape; Stick-slip; Mechanical property; Self-lubricating property

摘要：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.