超导材料YBa_2Cu_3O_(7-δ)摩擦学性能研究现状  

Research Progress in Tribological Properties of YBa_2Cu_3O_(7-δ) Superconductor

作　　者：董丽荣[1] 李长生[1] 丁巧党[1] 王旻璐[1] 

机构地区：[1]江苏大学材料摩擦学省重点实验室

出　　处：《材料导报》2007年第9期1-5,共5页Materials Reports

基　　金：国家自然科学基金资助项目(50372026)

摘　　要：一些超导材料在超导转变温度下表现出摩擦系数突然降低,引起科学家极大关注,因而对摩擦的微观起源进行了研究,并探讨了声子的产生和电子激励对摩擦的贡献。综述了低温摩擦学的主要研究方法,重点总结了YBa2Cu3O7-δ在正常态及超导态下的摩擦学特性,分析了YBa2Cu3O7-δ在超导态下具有较低摩擦系数的摩擦机理,展望了YBa2Cu3O7-δ在摩擦学方面的应用前景。The friction coefficients of some superconducting materials decrease abruptly when the temperature is cooled below superconducting transition temperature, which causes scientists to pay much attention and research the fundamental origins of friction. It is explained that frictional dissipation is dominated by both the electronic excitations and phonons. In this paper, the main research method of cryotribology is introduced. The tribological properties and friction mechanisms of YBa2Cu3O7-δ in superconducting state and normal state are summarized. In addition, the applications of YBa2Cu3O7-δ in tribology are presented.

关 键 词：YBA2CU3O7-Δ 石英晶体微天平 低温摩擦实验机 摩擦机理 

分 类 号：TB34[一般工业技术—材料科学与工程]