Microstructure and properties of FeCoCrNiMoSix high-entropy alloys fabricated by spark plasma sintering

JOURNAL OF ALLOYS AND COMPOUNDS

卷:884

Article

Yang, Yucheng¹  Ren, Yaojia¹  Tian, Yanwen¹  Li, Kaiyang²  Zhang, Weidong³  Shan, Quan⁴  Tian, Yingtao⁵  Huang, Qianli¹  Wu, Hong¹ 

[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada

[3] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China

[4] Kunming Univ Sci & Technol, Acad Mat Sci & Engn, Kunming, Yunnan, Peoples R China

[5] Univ Lancaster, Dept Engn, Lancaster LA1 4YW, England

关键词: FeCoCrNi;    High-entropy alloy;    Si;    Tribological behavior;    Corrosion resistance;    Spark plasma sintering;   

DOI  :  10.1016/j.jallcom.2021.161070

来源: Elsevier

【 摘 要 】

FeCoCrNiMoSix (x = 0.5, 1.0, 1.5) high-entropy alloys (HEAs) were successfully fabricated by spark plasma sintering (SPS). The microstructure, tribological properties, oxidation behaviors and corrosion resistance of the HEAs were systematically investigated. The experimental results showed that the microstructure mainly consisted of Fe-rich face-centered-cubic (FCC) phase, Mo-rich FCC phase solid solution and various Si-rich intermetallics, where the elevated Si content coarsened the primary Mo-rich phase into dendritic eventually. These Mo-rich dendrites possessed strong covalent-dominant atomic bonds that enhanced the microhardness (from 725 to 1186 HV) and wear resistance. The FeCoCrNiMoSi0.5 HEA exhibited an outstanding combination of relatively high wear resistance and the strongest oxidation resistance under 800 degrees C among the three alloy compositions. The corrosion resistance of HEAs showed an increasing trend with the elevated Si content, and FeCoCrNiMoSi1.5 presented the best performance. (c) 2021 Published by Elsevier B.V.

【 授权许可】

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