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国家自然科学基金(50575121)

作品数:3 被引量:12H指数:3
相关作者:张振宇雒建斌路新春更多>>
相关机构:清华大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划中国博士后科学基金更多>>
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Effect of La_2O_3 on microstructure,mechanical and tribological properties of Ni-W coatings被引量:5
2009年
In this paper, a Ni-W-La2O3 composite coating was prepared by the electrodeposition method. Microhardness tester and environmental scanning electron microscope equipped energy dispersive spectroscopy were employed to investigate the microhardness and the surface morphology of the composite coatings respectively, and the high temperature friction behavior and corrosion resistance of the coatings against molten glass were investigated by using a high temperature tribometer. The results show that La2O3 can refine the microstructure effectively, and make the element distribution uniform, which leads to the increase of average microhardness. La2O3 particulates can reduce the friction coefficient between the composite coating and glass during the sliding process at about 973 K largely, and the corrosion resistance of the La2O3 added Ni-W coatings is effectively improved compared with that of the non-added one, furthermore the mechanism of friction-reducing and anti-corrosion is also discussed.
HAN BaoLei LU XinChun
关键词:钨涂层显微硬度计高温摩擦熔融玻璃
Tribological properties of La_2O_3 and CeO_2 doped CoCrW coatings deposited by supersonic plasma spraying被引量:4
2007年
A novel supersonic plasma spraying was used to prepare rare earth oxides doped CoCrW coatings. X-ray diffractometer, contact surface profiler, hardness tester, micro-friction and -wear tester and en- vironmental scanning electron microscope equipped with energy dispersive X-ray spectroscopy were employed to investigate the phase structure, surface morphology, microhardness, friction and wear properties of the sprayed coatings. The results show that rare earth oxide doped coatings have high microhardness and excellent tribological properties. Furthermore, the friction and wear mechanisms of sprayed coatings are also discussed.
ZHANG ZhenYuLU XinChunLUO JianBin
关键词:地球科学
超音速等离子喷涂法制备La_2O_3和CeO_2掺杂CoCrW涂层的摩擦学性能研究被引量:3
2007年
利用一种新型的超音速等离子喷涂方法制备了稀土氧化物掺杂CoCrW涂层.通过X射线衍射仪、接触表面形貌仪、显微硬度测试仪、多功能摩擦磨损试验机和具有EDS能谱的环境扫描电子显微镜对涂层的相结构、表面形貌、显微硬度、摩擦磨损性能进行了研究.实验结果显示,稀土氧化物掺杂涂层具有很高的显微硬度和优越的摩擦学性能.同时,对涂层的摩擦和磨损机理进行了研究.
张振宇路新春雒建斌
关键词:超音速等离子喷涂稀土氧化物摩擦学性能
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