The oxidation resistance and tribological properties of Ni-based composites with in situ/ex situ Al2O3 and TiC ceramic phases at high temperatures

被引：6

作者：

Wang, Jianyi ^{[1
,2
]}

Wang, Wenzhen ^{[1
]}

Jia, Junhong ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2016年 / 31卷 / 20期

基金：

中国国家自然科学基金;

关键词：

Ni-based composites; tribological properties; ceramic phases; high temperature; SELF-LUBRICATING COMPOSITES; WEAR BEHAVIOR; ELEVATED-TEMPERATURE; DEGREES-C; COATINGS; FRICTION; FABRICATION;

D O I：

10.1557/jmr.2016.350

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni-based composites with in situ formed Al2O3 and TiC ceramic phases were fabricated by hot pressing technology and that with directly added Al2O3 and TiC particles (ex situ) were also fabricated for comparison. The antioxygenic property and tribological properties of the composites were comparatively studied. The results show that the high-temperature oxidation resistance of the composite with in situ formed Al2O3 and TiC ceramic is superior to that of ex situ composite, and the friction coefficient of in situ composite is lower than that of ex situ composite in the wide temperature range from 400 degrees C to 1000 degrees C. The lowest friction coefficient was about 0.19 at 1000 degrees C and the wear rate of the composites are in the order of magnitude of 10(-6) mm(3)/(N m) at high temperatures. The differences in tribological properties of in situ/ex situ composites are attributed to the formation of the glaze layer composed of MoO3, TiO2, Al2TiO5, NiAl2O4, and NiO on the worn surfaces and the difference of the distribution of the ceramics in the matrix.

引用

页码：3262 / 3271

页数：10

共 35 条

[1] Comparison between Ni-Cr-40vol%TiC wear-resistant plasma sprayed coatings produced from self-propagating high-temperature synthesis and plasma densified powders [J].