试验环境温度对小牛血清边界润滑条件下超高分子量聚乙烯往复磨损行为的影响  

Effect of Temperature of Test Environment on Reciprocating Friction and Wear Behaviors of UHMWPE under the Condition of Boundary Lubrication with Calf Serum

作　　者：吴莉[1,2] 高新蕾[3] 高万振[2] 裴召辉[2] 王集辉[2] 

机构地区：[1]武汉工程大学化工与制药学院,绿色化工过程省部共建教育部重点实验室,湖北省新型反应器与绿色化学工艺重点实验室,湖北,武汉430073 [2]武汉材料保护研究所,湖北武汉430030 [3]武汉工业学院化学与环境工程系,湖北武汉430023

出　　处：《塑料》2010年第2期55-57,共3页Plastics

基　　金：国家自然科学基金(50575164)

摘　　要：采用自行研制的往复摩擦磨损试验机,在法向载荷为50 N、往复频率1 Hz、摩擦副接触形式为圆环外圆周/平面、初始线接触长度为6 mm,相对湿度为80%、体积含量25%小牛血清去离子水溶液边界润滑的试验条件下,研究试验环境温度对超高分子量聚乙烯(UHMWPE)与钛合金配副的往复摩擦磨损性能的影响,并利用扫描电子显微镜观察37℃时磨损表面形貌。结果表明:试验环境温度θ由10℃升高至30℃,UHMWPE/钛合金摩擦副的平均摩擦因数aμ呈明显下降趋势,由30℃升高至37℃时,μa开始缓慢上升,UHMWPE的体积磨损量Wv随试验环境温度θ变化也呈现相似的规律;磨损机制主要表现为磨料磨损。Effect of temperature of test environment on reciprocating friction and wear behaviors of UHMWPE/Ti6A14V rubbing pairs was investigated at 80 % RH （ relative humidity） with a homemade reciprocating friction and wear tester under the condition of boundary lubrication with 25vol. % calf serum deionized water solution as artificial synovia. The contact between polymer ring＇ s outside circumference and titanium alloy disk＇ s plane took the form of line/plane, their length of initial linear contact was thus 6 mm, normal load was 50 N and reciprocating frequency was 1 Hz. In order to investigate wear mechanism,photographies of worn surfaces were observed by SEM at 37 ℃. The results showed that the friction coefficient average/μα of UHMWPE/Ti6A14V rubbing pairs decreased obviously when temperature of test environment θ increased from 10 ℃ to 30 ℃ ,but it began to increase slowly when θ increased from 30 ℃to 37 ℃ ; variation of volume loss of wear of UHMWPE Wv with θ was similar with that of/μα ;wear mechanism of UHMWPE against titanium alloy was primary abrasive wear.

关 键 词：超高分子量聚乙烯 往复摩擦磨损 试验环境温度 小牛血清 钛合金 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]