HVOF-Sprayed Adaptive Low Friction NiMoAl–Ag Coating for Tribological Application from 20 to 800 °C

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 先进润滑与防护材料研究发展中心

	HVOF-Sprayed Adaptive Low Friction NiMoAl–Ag Coating for Tribological Application from 20 to 800 °C
	Chen J(陈杰)1,2 ; Zhao XQ(赵晓琴)1; Zhou HD(周惠娣)1 ; Chen JM(陈建敏)1 ; An YL(安宇龙)1 ; Yan FY(阎逢元)1 ; Chen JM(陈建敏); An YL(安宇龙); Yan FY(阎逢元)
刊名	Tribology Letters
	2014
卷号	56 期号:1 页码:55-66
关键词	Self-lubricating coating Silver molybdate HVOF spraying Ni-based coating
ISSN号	1023-8883
通讯作者	安宇龙 ; 阎逢元 ; 陈建敏
英文摘要	An adaptive NiMoAl–Ag composite coating was deposited by high-velocity oxy fuel spraying, and its tribological properties from 20 to 800 ℃ under unlubricated conditions were evaluated using a CSM high-temperature tribometer. Scanning electron microscopy, X-ray diffraction and Raman spectroscopy were used to characterize the coating and corresponding wear tracks to determine the lubrication mechanisms. The results showed that the friction coefficient of the NiMoAl–Ag composite coating was around 0.3 from 20 to 600 ℃ and reached the lowest value of 0.09 at 800 ℃. Meanwhile, wear rates of the coating were maintained on the order of 10^-5 mm³/N m at the test temperatures except for 400 and 600 ℃. Characterization of the NiMoAl–Ag coating revealed that silver provided lubrication below 400 ℃. Ag2Mo₂O₇ and Ag₂MoO₄, which were formed through tribochemical reactions, acted as high-temperature lubricants above 400 ℃. It was especially proposed that silver in a nearly molten state was effective in reducing the friction of the NiMoAl–Ag coating at 800 ℃. Moreover, a comprehensive lubrication mechanism model of an NiMoAl–Ag composite coating at 800 ℃ was established to explain the extremely low friction coefficient and wear rate of the coating.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the National Natural Science Foundation of China (Grant Nos. 51302272;51275509;51175491);the 973 Project of China (No. 2013CB632300);the Chinese Academy of Sciences
语种	英语
WOS记录号	WOS:000342084000005
公开日期	2014-11-24
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/6772]
专题	兰州化学物理研究所_先进润滑与防护材料研究发展中心兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Chen JM(陈建敏); An YL(安宇龙); Yan FY(阎逢元)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen J,Zhao XQ,Zhou HD,et al. HVOF-Sprayed Adaptive Low Friction NiMoAl–Ag Coating for Tribological Application from 20 to 800 °C[J]. Tribology Letters,2014,56(1):55-66.
APA	Chen J.,Zhao XQ.,Zhou HD.,Chen JM.,An YL.,...&阎逢元.(2014).HVOF-Sprayed Adaptive Low Friction NiMoAl–Ag Coating for Tribological Application from 20 to 800 °C.Tribology Letters,56(1),55-66.
MLA	Chen J,et al."HVOF-Sprayed Adaptive Low Friction NiMoAl–Ag Coating for Tribological Application from 20 to 800 °C".Tribology Letters 56.1(2014):55-66.