沙漠车用陶瓷活塞顶的研制  

Ceramic Piston Crown for Truck Run in Desert

作　　者：邬凤英[1] 庄汉锐[1] 李文兰[1] 徐素英[1] 罗新宇[1] 符锡仁[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》1998年第3期423-426,共4页Journal of Inorganic Materials

基　　金："八五"国家科技攻关项目!85-10-03-16

摘　　要：氮化硅陶瓷活塞顶是无冷机的关键部件之一．本工作选用高熔点的稀土氧化物为添加剂，在气氛加压炉内1800～1960℃，0．1～6MPaN2压力下进行烧结，制备了性能优越的氮化硅陶瓷材料．其常温抗弯强度为750MPa，断裂韧性为7．2MPam1/2，Weibull模数为12．3．使用该材料制备的氮化硅陶瓷活塞顶，装在6105型无水冷柴油机中，在规定的条件下进行耐久考核，已完成700h以上的台架实验，氮化硅陶瓷活塞顶装在EQ2060沙漠车上进行道路试验，已行驶1900km以上，经检验氮化硅陶瓷活塞顶完好无损．The silicon nitride ceramic piston crown is a critical component for the cooling-free dieselengine. The piston crown material used is GPS-RBSN with rare-earth oxide additives, sintered inthe range of 1800-1960℃, under nitrogen pressure of 0.1~6 MPa, and its bend strength being750 MPa, KIC 7.2 MPa.m1/2, weibull Modulus 12.3. Piston crowns made from this material wereassembled in 6105 cooling-free diesel engines, the diesel engine constructed was rig-tested for morethan 700 hours. The engine was installed in an EQ2060 truck and road-tested for more than1900km in desert and no trouble found.

关 键 词：沙漠车 陶瓷 活塞顶 柴油机 氮化硅陶瓷 

分 类 号：TQ174.758[化学工程—陶瓷工业]