热压烧结TZ3Y20A-SrSO_4陶瓷基复合材料的高温摩擦学性能  

High-temperature tribological properties of hot-pressed TZ3Y20A-SrSO_4 ceramic matrix composites

作　　者：刘虹志[1] 欧阳家虎[1] 李玉峰[1] 

机构地区：[1]哈尔滨工业大学特种陶瓷研究所,黑龙江哈尔滨150001

出　　处：《材料热处理学报》2009年第2期9-13,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(50572020);国家863计划项目(2006AA03Z537);教育部新世纪优秀人才支持计划项目(NCET-06-0339)

摘　　要：采用化学沉淀法制备出粒径约80nm的等轴状SrSO4粉体。选用ZrO2(3mol%Y2O3)-20wt%Al2O3(TZ3Y20A)陶瓷为基体,采用热压烧结法制备出TZ3Y20A-SrSO4陶瓷基复合材料,并对复合材料的组织结构和力学性能进行了研究。采用球盘式高温摩擦磨损试验机测定复合材料从室温到800℃的摩擦学性能。TZ3Y20A-SrSO4复合材料在室温至800℃范围内摩擦系数在0.31～0.42之间,磨损率为10-5mm3/Nm数量级。加入SrSO4后复合材料的磨损表面形成了一层润滑膜,有效地改善了其高温摩擦磨损性能。Equiaxed shape SrSO4 powder with a particle size of 80nm was synthesized by chemical precipitation method. ZrO2 （3mol% Y2O3 ）- 20wt%Al2O3 （TZ3Y20A） ceramics was selected as the matrix. TZ3Y20A-SrSO4 ceramic matrix composites were fabricated by hot-pressing process. The microstructure and mechanical properties of the sintered specimens were investigated. The tribological properties of the composites from room temperature to 800℃ were studied by using a ball-on-disk high temperature wear tester. The friction coefficients of different TZ3Y20A- SrSO4 composites are in the range of 0.31 to 0.42 and the wear rates are in the order of 10^- 5 mm^3/Nm from room temperature to 800 ℃. A smooth SrSO4 lubricating film is formed on the worn surface of TZ3Y20A-SrSO4 composites, which hats distinctly improved the high-temperature friction and wear properties.

关 键 词：陶瓷基复合材料 SrSO4纳米粉体 热压烧结 高温摩擦学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]