Influence of composition and microstructure on the tribological property of SPS sintered MCrAlY alloys at elevated temperatures | |
Department | 先进润滑与防护材料研究发展中心 |
Cao SL(曹四龙)1,2; Ren SF(任书芳)3; Zhou JS(周健松)1; Yu YJ(俞友军)1; Wang LQ(王凌倩)1; Guo C(郭纯)1; Xin BB(辛本斌)1,2; Zhou JS(周健松); Yu YJ(俞友军) | |
The second department | 固体润滑国家重点实验室 |
2018 | |
Source Publication | Journal of Alloys and Compounds |
ISSN | 0925-8388 |
Volume | 740Issue:0Pages:790-800 |
Abstract | In order to explore the mechanical and tribological properties of high-temperature alloy materials, the present study aims to investigate the synthesis, microstructure, composition, mechanical and tribological properties of high-temperature monolithic MCrAlY (M = Ni or NiCo) alloys. The alloys were prepared by spark plasma sintering technique. The microstructure and composition were studied by Scanning Electron Microscopy and X-ray diffractometry. The tribological properties of Ni-based alloys were tested by friction tester against Si3N4 balls at elevated temperatures. The results showed that the NiCrAlY alloy was composed of γ-Ni(Cr) solid solution, β-NiAl, and γ′-Ni3Al with little CrAl. The NiCoCrAlY alloy was consisted of γ-Ni(Cr/Co) solid solution, β-NiAl and γ′-Ni3Al. The hardness of NiCrAlY alloy was higher than that of NiCoCrAlY alloy. However, its flexural strength was lower than the NiCoCrAlY alloy. The more uniform microstructure of NiCoCrAlY alloy along with the evenly dispersed fine reinforced phases and the less pores defects contributed to the higher flexural strength. The μs and WRs of NiCrAlY and NiCoCrAlY alloys increased firstly to reach the highest value at 200 and 400 °C, and then declined with the temperature increasing to 800 °C. The WRs of NiCrAlY were lower than that of NiCoCrAlY for all the temperatures. Adhesive wear dominated the wear mechanism of NiCrAlY/Si3N4 tribo-pair, while abrasive wear was the main wear mechanism for NiCoCrAlY/Si3N4 tribo-pair. At high temperature, oxidation of worn surfaces to a certain extent decreased the wear for both the tribo-pairs. The higher hardness of NiCrAlY may contributed to the lower wear than NiCoCrAlY. |
Keyword | High-temperature Alloys Sintering Mechanical Properties Tribological Properties |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.jallcom.2017.12.233 |
Funding Organization | the National Natural Science Foundation of China (Grant Nos. 51475444 ; 51405475) |
Indexed By | SCI |
If | 3.779 |
Language | 英语 |
Funding Project | 金属基高温润滑材料研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/23736 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Zhou JS(周健松); Yu YJ(俞友军) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Gansu Inst Polit Sci & Law, Key Lab Evidence Sci Res & Applicat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China |
Recommended Citation GB/T 7714 | Cao SL,Ren SF,Zhou JS,et al. Influence of composition and microstructure on the tribological property of SPS sintered MCrAlY alloys at elevated temperatures[J]. Journal of Alloys and Compounds,2018,740(0):790-800. |
APA | Cao SL.,Ren SF.,Zhou JS.,Yu YJ.,Wang LQ.,...&Yu YJ.(2018).Influence of composition and microstructure on the tribological property of SPS sintered MCrAlY alloys at elevated temperatures.Journal of Alloys and Compounds,740(0),790-800. |
MLA | Cao SL,et al."Influence of composition and microstructure on the tribological property of SPS sintered MCrAlY alloys at elevated temperatures".Journal of Alloys and Compounds 740.0(2018):790-800. |
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