ISSN   1004-0595

CN  62-1095/O4

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大气环境下YBa_2Cu_3O_7薄膜的摩擦行为和表面形貌[J]. 摩擦学学报, 2001, 21(2).
引用本文: 大气环境下YBa_2Cu_3O_7薄膜的摩擦行为和表面形貌[J]. 摩擦学学报, 2001, 21(2).
The Friction Behavior and Surface Topography of YBa_2Cu_3O_7 Film in Ambient Environment[J]. TRIBOLOGY, 2001, 21(2).
Citation: The Friction Behavior and Surface Topography of YBa_2Cu_3O_7 Film in Ambient Environment[J]. TRIBOLOGY, 2001, 21(2).

大气环境下YBa_2Cu_3O_7薄膜的摩擦行为和表面形貌

The Friction Behavior and Surface Topography of YBa_2Cu_3O_7 Film in Ambient Environment

  • 摘要: 利用球 -盘摩擦试验装置考察了大气环境下 YBa2 Cu3O7薄膜和多晶硅薄膜同蓝宝石球及钢球对摩时的摩擦行为 ,并用原子力显微镜对其表面形貌进行了分析 .结果表明 :表面相对较粗糙的 YBa2 Cu3O7薄膜与蓝宝石球对摩时的摩擦系数低于多晶硅薄膜 /蓝宝石球的摩擦系数 ;而 2种薄膜与钢球对摩时的摩擦系数相当 ;YBa2 Cu3O7薄膜与蓝宝石球对摩时的启动摩擦非常稳定 ,而多晶硅薄膜的启动摩擦很不稳定 ;与钢球对摩时两者的启动摩擦则都比较稳定 .对 YBa2 Cu3O7薄膜的磨损表面形貌分析研究表明 ,其表面突出物结合疏松 ,容易从基体表面磨损脱落 .

     

    Abstract: YBa 2Cu 3O 7 film and polysilicon film were prepared over the oxide layer of about 100 nm thick on Si substrate. The friction behavior of the films sliding against a sapphire ball or a steel ball in ambient environment was investigated with a ball on flat tribometer. The surface topography of the original film surfaces and worn film surfaces was examined by means of atomic force microscopy (AFM). As the results, the friction coefficient of YBa 2Cu 3O 7 film is lower than that of polysilicon film when sliding against a sapphire ball. It is almost the same for the two films when sliding against a steel ball. The initial friction of YBa 2Cu 3O 7 film in sliding against both sapphire ball and steel ball is much stable. However, the initial friction of polysilicon film in sliding against a sapphire ball fluctuates greatly during a cycle period. AFM observation of the original film surfaces and worn film surfaces indicates that super conducting protrusions exist on the original YBa 2Cu 3O 7 film surface. The protrusions are liable to remove during the friction process, thus the worn surface of YBa 2Cu 3O 7 film becomes much smooth.

     

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