Influence of composition and microstructure on the tribological property of SPS sintered MCrAlY alloys at elevated temperatures
文献类型:期刊论文
作者 | Cao SL(曹四龙)2,3; Ren SF(任书芳)1; Zhou JS(周健松)3; Yu YJ(俞友军)3; Wang LQ(王凌倩)3; Guo C(郭纯)3; Xin BB(辛本斌)2,3; Zhou JS(周健松); Yu YJ(俞友军) |
刊名 | Journal of Alloys and Compounds |
出版日期 | 2018 |
卷号 | 740期号:0页码:790-800 |
ISSN号 | 0925-8388 |
关键词 | High-temperature Alloys Sintering Mechanical Properties Tribological Properties |
DOI | 10.1016/j.jallcom.2017.12.233 |
英文摘要 | 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. |
学科主题 | 材料科学与物理化学 |
资助项目 | 金属基高温润滑材料研究组 |
语种 | 英语 |
WOS记录号 | WOS:000425494200092 |
资助机构 | the National Natural Science Foundation of China (Grant Nos. 51475444 ; 51405475) |
源URL | [http://210.77.64.217/handle/362003/23736] |
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 | Zhou JS(周健松); Yu YJ(俞友军) |
作者单位 | 1.Gansu Inst Polit Sci & Law, Key Lab Evidence Sci Res & Applicat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China |
推荐引用方式 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. |
入库方式: OAI收割
来源:兰州化学物理研究所
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