Microstructure, mechanical properties and tribological performance of CoCrFeNi high entropy alloy matrix self-lubricating composite | |
Department | 先进润滑与防护材料研究发展中心 |
Zhang AJ(张爱军)1,2; Han JS(韩杰胜)1; Su B(苏博)1; Li, Pengde1; Meng JH(孟军虎)1; Meng JH(孟军虎) | |
The second department | 固体润滑国家重点实验室 |
2017 | |
Source Publication | Materials and Design |
ISSN | 0264-1275 |
Volume | 114Pages:253-263 |
Abstract | A CoCrFeNi high entropy alloy matrix self-lubricating composite was prepared by spark plasma sintering using a mixture of CoCrFeNi high entropy alloy powder, nickel-coated graphite powder and nickel-coated MoS2 powder. The composite consisted of four phases: face-centered cubic phase of the high entropy alloy, graphite, MoS2 and nickel. Graphite and MoS2 existed in the composite were mainly due to the nickel coatings onto the lubricants and the unique advantage of spark plasma sintering. The hardness, yield strength, compressive strength and fracture toughness of the composite were 271 HV, 610 MPa, 921 MPa and 14.3 MPa·m0.5, respectively. The good mechanical properties of the composite were mainly derived from the CoCrFeNi high entropy alloy matrix. The composite exhibited excellent tribological properties from room temperature to 800 °C. From room temperature to medium temperatures, the reduction of friction coefficients and wear rates of the composite was attributed to the synergistic lubricating effect of graphite and MoS2. At high temperatures, it was found that various metal oxides formed on the composite surfaces played a key role in improving the tribological properties. |
Keyword | High Entropy Alloy Self-lubricating Composite Microstructure Mechanical Properties Tribological Properties |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.matdes.2016.11.072 |
Funding Organization | the Hundred Talent Program of the Chinese Academy of Sciences (Junhu Meng) |
Indexed By | SCI |
If | 4.364 |
Language | 英语 |
Funding Project | 金属基高温润滑材料组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21216 |
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 | Meng JH(孟军虎) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
Recommended Citation GB/T 7714 | Zhang AJ,Han JS,Su B,et al. Microstructure, mechanical properties and tribological performance of CoCrFeNi high entropy alloy matrix self-lubricating composite[J]. Materials and Design,2017,114:253-263. |
APA | Zhang AJ,Han JS,Su B,Li, Pengde,Meng JH,&孟军虎.(2017).Microstructure, mechanical properties and tribological performance of CoCrFeNi high entropy alloy matrix self-lubricating composite.Materials and Design,114,253-263. |
MLA | Zhang AJ,et al."Microstructure, mechanical properties and tribological performance of CoCrFeNi high entropy alloy matrix self-lubricating composite".Materials and Design 114(2017):253-263. |
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