Microstructure, mechanical and tribological properties of plasma-sprayed NiCrAlY-Mo-Ag coatings from conventional and nanostructured powders | |
Department | 固体润滑国家重点实验室 |
Li B(李博)1,2; Jia JH(贾均红)1; Han MM(韩敏敏)1; Gao, Yimin2; Wang WZ(王文珍)1; Li, Cong3; Jia JH(贾均红) | |
2017 | |
Source Publication | Surface and Coatings Technology |
ISSN | 0257-8972 |
Volume | 324Pages:552-559 |
Abstract | The conventional and nanostructured NiCrAlY-Mo-Ag composite coatings were prepared by atmospheric plasma spraying so as to make the hot parts achieve and maintain excellent tribological properties at elevated temperature of up to 900 ℃. The microstructure, mechanical and tribological properties of these two composite coatings were investigated and compared. The X-ray diffraction (XRD), micro-Raman, scanning election microscopy (SEM) and transmission electron microscopy (TEM) were used to analyze the composition and microstructure of the composite coatings. Results show that the nanostructured composite coating presented higher microhardness and adhesive strength than conventional composite coating. Meanwhile, the nanostructured composite coating had less defects, lower porosity, more compact microstructure and smaller grains as compared to the corresponding conventional coating which was useful to improve the performance of the composite coating. The nanostructured composite coating possessed better tribological properties as compared with the conventional composite coating. The sliding process could promote the tribo-chemical reaction between silver, nickel and molybdenum to form silver molybdates and nickel molybdates lubricating films on the worn surface at high temperature. The silver molybdates and nickel molybdates could also enhance tribological properties of composite coatings at high temperature. |
Keyword | Nanostructured Coating Plasma-spray Adhesive Strength Tribo-chemical Reaction Dense Structure |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.surfcoat.2017.06.034 |
Funding Organization | the National Natural Science Foundation of China (Grant Nos. 51471181;51575505;51675508) |
Indexed By | SCI |
If | 2.589 |
Language | 英语 |
Funding Project | 金属润滑材料研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22442 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Gao, Yimin; Jia JH(贾均红) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China 2.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China 3.Xian Univ Technol, Sch Mat Sci & Engn, Xian, Shaanxi, Peoples R China |
Recommended Citation GB/T 7714 | Li B,Jia JH,Han MM,et al. Microstructure, mechanical and tribological properties of plasma-sprayed NiCrAlY-Mo-Ag coatings from conventional and nanostructured powders[J]. Surface and Coatings Technology,2017,324:552-559. |
APA | Li B.,Jia JH.,Han MM.,Gao, Yimin.,Wang WZ.,...&贾均红.(2017).Microstructure, mechanical and tribological properties of plasma-sprayed NiCrAlY-Mo-Ag coatings from conventional and nanostructured powders.Surface and Coatings Technology,324,552-559. |
MLA | Li B,et al."Microstructure, mechanical and tribological properties of plasma-sprayed NiCrAlY-Mo-Ag coatings from conventional and nanostructured powders".Surface and Coatings Technology 324(2017):552-559. |
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