Ag/YBa2Cu3O7-δ自润滑复合材料的力学及摩擦性能
Mechanical and Tribological Properties of Ag/YBa2Cu3O7-δ Self-lubricating Composites
摘 要
利用粉末冶金法制备了组织均匀的Ag/YBa2Cu3O7-δ(YBCO)自润滑复合材料,采用XRD和SEM对其物相组成和显微结构进行了表征,分析了银含量对复合材料显微组织、力学性能和摩擦性能的影响.结果表明:常温常压下,当银质量分数为10%时,复合材料的摩擦性能最好,随银含量增加复合材料硬度减小,断裂韧度增大;真空条件下,复合材料的摩擦因数随银含量的增加而降低,且基本不随滑动速度的变化而变化;当温度降低到超导体的超导转变温度时,YBCO的摩擦因数急剧降低.
断裂韧度
摩擦
超导转变
self-lubricating composite
fracture toughness
friction
superconducting transition
Abstract
Ag/YBa2Cu3O7-δ (YBCO) self-lubricating composites with uniform and compact structure were prepared by powder metallurgy method.The phase composition and microstructure was studied by XRD and SEM.The effects of Ag content on the microstructure evolution and related mechanical and tribological properties of the composites were studied.The results showed that at normal temperature and pressure,when Ag content was 10wt.%,the composite had the best tribological properties.With the increase of Ag content,hardness of the composties decreased and fracture toughness increased.Under vacuum condition,the friction coefficient of the composites reduced with the increase of Ag content,and didnt change with the sliding velocity.When the temperature was lowered to below superconducting transition temperature of the superconductor,the friction coefficient decreased sharply.
中图分类号 TB33
所属栏目 材料性能及其应用
基金项目
收稿日期 2007/10/12
修改稿日期 2008/1/21
网络出版日期
作者单位点击查看
备注丁巧党(1982-),女,江苏姜堰人,硕士研究生.
引用该论文: DING Qiao-dang,LI Chang-sheng,DONG Li-rong. Mechanical and Tribological Properties of Ag/YBa2Cu3O7-δ Self-lubricating Composites[J]. Materials for mechancial engineering, 2008, 32(10): 60～62
丁巧党,李长生,董丽荣. Ag/YBa2Cu3O7-δ自润滑复合材料的力学及摩擦性能[J]. 机械工程材料, 2008, 32(10): 60～62
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参考文献
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