Influence of heat treatments on the microstructure as well as mechanical and tribological properties of NiCrAlY-Mo-Ag coatings | |
Department | 固体润滑国家重点实验室 |
Li, Bo1,2; Gao, Yimin1; Jia JH(贾均红)2; Han MM(韩敏敏)2; Guo HJ(国洪建)2; Wang WZ(王文珍)2; Jia JH(贾均红) | |
2016 | |
Source Publication | Journal of Alloys and Compounds |
ISSN | 0925-8388 |
Volume | 686Pages:503-510 |
Abstract | The influence of heat treatments on the microstructure, microhardness, adhesive strength and tribological properties from 25 °C to 900 °C of NiCrAlY-Mo-Ag composite coatings were investigated in this paper. The composite coatings were prepared by atmospheric plasma spraying and heat treated at 400 °C, 500 °C and 600 °C, respectively. The results shown that the microstructure of the coating became more homogeneous and more precipitated phase of Y2O3 arised after 500 °C heat treatment. The precipitated phase dispersively distributed in the matrix which could work as the oxide dispersive strengthening phase in the composite coating. Meanwhile, the heat treatment could also improve the micohardness of the composite coatings. The adhesive strength between composite coating and substrate enhanced by heat treatment and that coating heat treated at 500 °C registered the highest adhesive strength of 49.7 MPa. The composite coating heat-treated at 500 °C possessed the excellent lubricating properties at all test temperatures. The tribo-chemical reaction between silver and molybdenum occurred and the silver molybdate lubricating film formed on the worn surface at 700 °C and 900 °C. At 900 °C, the diffraction peaks of NiO were identified on the worn surface. The silver molybdate and NiO played the important lubricating role in the rubbing process for the NiCrAlY-Mo-Ag composite coatings at high temperature. |
Keyword | Plasma Spraying Coating Dispersion Strengthening Phase Adhesive Strength Tribological Behaviors Heat Treatment |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.jallcom.2016.06.075 |
Funding Organization | the National Natural Science Foundation of China (Grant No.51575505;51471181;51272207) |
Indexed By | SCI |
If | 3.133 |
Language | 英语 |
Funding Project | 金属润滑材料研究组 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/20465 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Gao, Yimin; Jia JH(贾均红) |
Affiliation | 1.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China |
Recommended Citation GB/T 7714 | Li, Bo,Gao, Yimin,Jia JH,et al. Influence of heat treatments on the microstructure as well as mechanical and tribological properties of NiCrAlY-Mo-Ag coatings[J]. Journal of Alloys and Compounds,2016,686:503-510. |
APA | Li, Bo.,Gao, Yimin.,Jia JH.,Han MM.,Guo HJ.,...&贾均红.(2016).Influence of heat treatments on the microstructure as well as mechanical and tribological properties of NiCrAlY-Mo-Ag coatings.Journal of Alloys and Compounds,686,503-510. |
MLA | Li, Bo,et al."Influence of heat treatments on the microstructure as well as mechanical and tribological properties of NiCrAlY-Mo-Ag coatings".Journal of Alloys and Compounds 686(2016):503-510. |
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