摘要
采用粉末冶金温压成形方法制备出了碳纤维体积含量为 10 %的短碳纤维增强锡青铜 (CF/Cu 10Sn)复合轴承材料 ,研究了温压温度、压力等对温压压坯密度的影响 ,同时对温压压坯的烧结行为和烧结体的力学性能进行了测试分析。试验结果表明 :通过选取合适的温压温度 ,温压成形可以明显提高CF/Cu 10Sn复合压坯的密度 ;对含有高模量碳纤维的CF/Cu 10Sn体系 ,温压成形时仍可用经典的粉末压制方程来描述压坯密度和压制压力之间的关系。此外 ,温压成形可以改善压坯中的颗粒充填状况 ,有利于控制烧结体的尺寸变化 ,并提高烧结体的密度和相关力学性能。
Short carbon fiber and Cu-10Sn pre-atomized powder were mixed with a special lubricant to prepare a powder premix. The premix was then compacted at different temperature and pressure, and CF/Cu-10Sn compacts with 10 % volume of carbon fiber were obtained. Relations between green densities of the compacts and compaction temperature, as well as compaction pressure were investigated. The sintering behaviors of warm and cold CF/Cu-10Sn compacts were also analysed. It was found that the warm compacted CF/Cu-10Sn parts have higher green density than the cold compacted ones. For warm compaction of CF/Cu-10Sn materials, the traditional compaction equations for metal powders can also be used to characterize relations between the green density and compaction pressure. Due to the high green density obtained, the sintered CF/Cu-10Sn materials have higher sintered density and better mechanical properties.
出处
《矿冶工程》
CAS
CSCD
北大核心
2002年第4期95-98,共4页
Mining and Metallurgical Engineering
基金
国家自然科学基金资助项目 (50 0 740 34)
关键词
CF/Fu-10Sn复合轴承材料
温压
致密化
性能
CF/Cu-10Sn composite bearing materials
warm compaction
densification mechanism
properties
