Effect of Loads on Tribological Behaviors of Ni3Al Matrix Self-Lubricating Composite Coating

被引：0

作者：

Fan X. ^{[1
]}

Li W. ^{[1
]}

Yang J. ^{[2
]}

Zhu S. ^{[2
]}

Cheng J. ^{[2
]}

Hu W. ^{[1
]}

He D. ^{[1
]}

机构：

[1] School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, Gansu

[2] State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, Gansu

来源：

Mocaxue Xuebao/Tribology | 2019年 / 39卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Load; Ni[!sub]3[!/sub]Al based; Plasma spraying; Tribological property; Wide temperature range;

D O I：

10.16078/j.tribology.2018198

中图分类号：

学科分类号：

摘要：

The micron spherical Ni3Al based composite powder has been fabricated by high-energy ball milling combined with spray granulation. Then it was deposited on an 1Cr18Ni9Ti stainless steel by plasma spraying to form a coating, then the influences of testing temperatures (25℃ to 800℃) and loads (5 N, 10 N and 20 N) on the tribological behaviors of this coating were evaluated. SEM, EDS and Raman techniques were adopted to study the lubrication and wear mechanisms of the coating tested at different loads, by analyzing the microstructure and phase constitutes of the wear debris, wear scar of the coating and the counterface pins. The results indicated that within temperature range 25~200℃, the increase of load from 5 N to 10 N accelerated the precipitation of the lubricant resulting from the synergism between the frictional heat and applied load, providing a friction and wear reduction. However, with further increasing the load to 20 N in this temperature range, the coating was deformed plastically, leading to blocking effect and thus increasing the friction and wear. At temperature from 400 to 600℃, the oxidation process was accelerated by the friction heat caused by the increased loads, thereby decreased the friction and wear. At 800℃, the worn surfaces tested at all the loads were covered by a continuous and smooth oxidized glaze layer, which was rich in NiCr2O4, Ag2MoO4 and NiO. The distinction was that when the load of 20 N was applied, the local high stress destroyed the integrity of the lubricating film, thereby decreased the tribological properties. © 2019, Science Press. All right reserved.

引用

页码：418 / 425

页数：7

共 20 条

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