Ni3Al Matrix Composite with Lubricious Tungstate at High Temperatures

被引：24

作者：

Zhu, Shengyu ^{[1
,2
]}

Bi, Qinling ^{[1
]}

Yang, Jun ^{[1
]}

Liu, Weimin ^{[1
]}

机构：

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

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

来源：

TRIBOLOGY LETTERS | 2012年 / 45卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Ni3Al; W; Tungstate; Tribology; SELF-LUBRICATING COMPOSITES; TRIBOLOGICAL PROPERTIES; SOLID LUBRICANTS; INTERMETALLICS; PM212;

D O I：

10.1007/s11249-011-9885-4

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ni3Al-Ag-BaF2/CaF2-W composites were fabricated by the powder metallurgy route, and their tribological properties over a wide temperature range, starting from room temperature up to 800 A degrees C, were investigated. The Ni3Al matrix composite with 15 wt% BaF2/CaF2 exhibited a favorable friction coefficient (range 0.3-0.4) and wear rate (0.2-6.2 x 10(-4)mm(3) N-1 m(-1)). The formation of BaWO4 and CaWO4 with lubricity on the worn surface due to a tribo-chemical reaction at high temperatures provided excellent lubricating properties. The low friction coefficient over a broad temperature range could be attributed to the synergistic effect of Ag, BaF2/CaF2, BaWO4, and CaWO4.

引用

页码：251 / 255

页数：5

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