Preparation and Tribological Properties of Ni3Al Matrix Self-Lubricating Composite Coating

doi:10.16078/j.tribology.2018033

	Preparation and Tribological Properties of Ni3Al Matrix Self-Lubricating Composite Coating
	Li, Wensheng 1; Fan, Xiangjuan 1; Yang, Jun 2; Zhu, Shengyu 2; Hu, Wei 1; Sun, Yang 1
刊名	Mocaxue Xuebao/Tribology
	2018-11-01
卷号	38 期号:6 页码:626-634
关键词	Abrasion Adhesives Atmospheric temperature Ball milling Barium compounds Binary alloys Chromium compounds Composite coatings Friction Molybdenum compounds Nickel oxide Plasma jets Plasma spraying Plastic coatings Scanning electron microscopy Self lubricating composites Silver compounds Spectrometers Tribology Energy dispersive spectrometers Friction and wear properties High temperature tribometer High-temperature lubricants Ni3Al based Plastic deformation abilities Self-lubricating Self-lubricating properties
ISSN号	10040595
DOI	10.16078/j.tribology.2018033
英文摘要	In this study, a feed of Ni3Al matrix self-lubricating composite powder has been fabricated by high-energy ball milling combined with spray granulation methods. Then it was deposited on the steel surface by plasma spraying to form a self-lubricating coating. The friction and wear properties of the Ni3Al matrix self-lubricating composite coating at elevated temperatures in atmosphere were tested on a HT-1000 pin-on-disk type high-temperature tribometer. In addition, the microstructure, phase composition and wear mechanism of the coating were characterized and analyzed by scanning electron microscopy, energy dispersive spectrometer and Raman. The results show that the coating had a good self-lubricating property from 25 to 800 , characterized by friction coefficients of 0.14~0.42 and wear rates of 2.41×10-4 ~ 5.76×10-4 mm3/(Nm). The wear mechanism can be explained as follows: (1) within temperature range 25 ~ 400 , an effective transfer lubricating film formed on the worn surface due to the increase of the toughness of Ni3Al intermetallic and the improved plastic-deformation ability of soft metallic silver at higher temperature, thereby improving the friction and wear properties of the coating, the wear mechanisms were brittle fracture, abrasive wear and adhesive wear. (2) At 600 , the wear surface was partially covered by a complete lubrication film due to the excessive softening of Ag and incomplete brittle-plastic transformation of BaF2/CaF2 eutectic, thus deteriorating the tribological properties, and then the wear mechanism was peeling and abrasive wear. (3) At 800 , due to the formation of a continuously smooth enamel layer rich in high-temperature lubricant (NiO, Ag2MoO4 and NiCr2O4) on the worn surface, the friction coefficient and the wear rate were greatly reduced, and the wear mechanism was mainly oxidation wear and adhesive wear. © 2018, Science Press. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114735]
专题	材料科学与工程学院
作者单位	1.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; Gansu; 730000, China
推荐引用方式 GB/T 7714	Li, Wensheng,Fan, Xiangjuan,Yang, Jun,et al. Preparation and Tribological Properties of Ni3Al Matrix Self-Lubricating Composite Coating[J]. Mocaxue Xuebao/Tribology,2018,38(6):626-634.
APA	Li, Wensheng,Fan, Xiangjuan,Yang, Jun,Zhu, Shengyu,Hu, Wei,&Sun, Yang.(2018).Preparation and Tribological Properties of Ni3Al Matrix Self-Lubricating Composite Coating.Mocaxue Xuebao/Tribology,38(6),626-634.
MLA	Li, Wensheng,et al."Preparation and Tribological Properties of Ni3Al Matrix Self-Lubricating Composite Coating".Mocaxue Xuebao/Tribology 38.6(2018):626-634.