摘要
采用热压法制备出Al_2O_3/TiC复合陶瓷材料,该材料具有良好的综合力学性能,抗弯强度为850MPa,断裂韧性为4.9MPa·m1/2。由高速环块磨损试验机对其摩擦磨损行为及其磨损机理作了试验研究。用扫描电镜观察了磨损表面形貌。结果表明:Al_2O_3/TiC复合陶瓷拉丝模材料磨损率随试验转速升高而下降,但压力变化对磨损率的影响不大。Al_2O_3/TiC复合陶瓷拉丝模材料磨损机理主要是脆性脱落和犁沟,具有良好的耐磨性。是制备拉丝模的优良材料。
Al2O3/TiC ceramic composite was produced by using hot pressing sintering.Al2O3/TiC ceramic composite has good general mechanical properties, its flexural strength is 850 MPa and fracture toughness reaches 4. 9 MPa · m^1/2. The friction and wear behavior of Al2O3/TiC ceramic composite were studied at the high speed wear and tear test machine. Worn surfaces were observed by the scanning electron microscope. Results show that the wear rate of Al2O3/TiC ceramic composite declines with the increase of rotation speed, but the shifted pressure on specimen has little effect on wear rate. The wear mechanism of Al2O3/TiC ceramic composite are mostly brittleness break off and furrow and it has great capability in wear resistance. Al2O3/TiC ceramic composite is an excellent material used for preparing wire drawing dies.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第12期1522-1526,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50275088
50475133)
教育部新世纪人才支持计划(NCET-04-0622)资助项目。~~
关键词
氧化铝/碳化钛陶瓷复合材料
拉丝模
摩擦磨损
制备
alumina/titanium carbide ceramic composite
wire drawing dies
friction and wear
preparation
作者简介
杨学锋（1977～），男，博士研究生。
通讯作者：邓建新（1966～），男，教授，博士研究生导师。
