陶瓷材料在G-M制冷机中的应用  

APPLICATION OF CERAMIC MATERIALS IN G-M REFRIGERATOR

作　　者：苏小陶[1,2] 方志春[1,2] 龚领会[1] 陆文海[1] 张亮[1] 李来风[1] 

机构地区：[1]中国科学院理化技术研究所 [2]中国科学院研究生院北京100039

出　　处：《低温工程》2004年第6期24-27,42,共5页Cryogenics

基　　金：国家 8 6 3重大项目基金 (2 0 0 2AA30 6 16 1);北京市科委重大项目基金 (H0 2 0 4 2 0 0 2 0 330 )资助

摘　　要：采用部分稳定ZrO2 基高韧性陶瓷材料代替传统的金属及填充聚四氟乙烯制备出G -M制冷机旋转阀阀座和阀芯摩擦副。通过建立物理模型对陶瓷旋转阀的磨损微粒厚度进行了计算分析 ,与常规材料制备的旋转阀进行对比 ,陶瓷旋转阀具有良好的气密性及耐磨损能力 ,可以提高G M制冷机寿命和可靠性。Comparing ceramics with metallic materials and polymers,the ceramics appear to be feasible as cryogenic structural materials because they have high strength, elastic modul and size stability, as well as high resistance to wear. In order to improve the lifetime and the reliability of G-M refrigerator,the ceria stabilized zirconia polycrystalline has been applied to fabricate the rotary valve instead of the traditional one made of metal and the polytetrafluoroethylene. Through the experiments and the theoretical analysis, it is indicated that the rotary valve made of ceramic materials has good sealing and wearable abilities.

关 键 词：陶瓷材料 旋转阀 高韧性 代替 ZRO2 填充聚四氟乙烯 材料制备 制冷机 摩擦副 气密性 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程] TB651[一般工业技术—制冷工程]