Microstructure evolution and properties of Fe-Ni-Cr-Co-Mo-W high-entropy alloy coatings by plasma surface alloying technology

被引:11
作者
Yang, Jijie [1 ]
Wang, Chenglei [1 ]
Zhang, Laichang [3 ]
Wang, Zhijun [5 ]
Liang, Mulin [1 ]
Liu, Chong [1 ]
Liu, Weijie [1 ]
Li, Xin [1 ]
Zhou, Shengfeng [2 ]
Tan, Hong [4 ]
机构
[1] Guilin Univ Elect Technol, Engn Res Ctr Elect Informat Mat & Devices, Sch Mat Sci & Engn, Guangxi Key Lab Informat Mat,Minist Educ, Guilin 541004, Peoples R China
[2] Jinan Univ, Inst Adv Wear & Corros Resistance & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China
[3] Edith Cowan Univ, Ctr Adv Mat & Mfg, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia
[4] Guilin Med Univ, Affiliated Hosp, Guilin 541001, Guangxi, Peoples R China
[5] Guangxi Mingxin Chassis Parts Co Ltd, Guilin 541001, Guangxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Microstructure evolution; High-entropy alloy coating; Gradient structure; Five-element co-infiltration; MECHANICAL-PROPERTIES; LAYER; RESISTANCE; STEEL;
D O I
10.1016/j.surfcoat.2023.129732
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The purpose of this study is to develop a new type of high-entropy alloy (HEA) coating with high temperature oxidation resistance. In this paper, the Fe-Ni-Cr-Co-Mo-W HEA coatings were prepared by plasma surface alloying technology with different holding temperatures (1150 & DEG;C, 1200 & DEG;C, 1250 & DEG;C, 1300 & DEG;C). The microstructure morphology evolution and properties of Fe-Ni-Cr-Co-Mo-W HEA coatings were systematically studied. The results indicate that all the Fe-Ni-Cr-Co-Mo-W HEA coatings are composed of a deposition layer and diffusion layer, forming gradient structure HEA coating. The element gradient distribution in the diffusion layer achieves the metallurgical bonding effect. The deposition layer conforms to the definition of HEAs based on the composition or configuration entropy, and forms the surface HEAs. The phase of Fe-Ni-Cr-Co-Mo-W HEA coatings is all composed of HCP phase + FCC phase. The higher the holding temperature, the greater the supply of alloying elements are deposited by sputtering, and the higher the density of surface vacancy formation, which promotes the diffusion of atoms and the growth of grain structure. The surface morphology of the Fe-Ni-Cr-CoMo-W HEA coating changes from the pinecone-like large particle dense accumulation morphology to flat and compact plane, and then to fine particles compact accumulation morphology. The properties of the 1300 & DEG;C FeNi-Cr-Co-Mo-W HEA coating is the best, the abrasive resistance and high temperature oxidation resistance are 3.66 and 5.5 times higher than those of the matrix respectively. The results indicate that the Fe-Ni-Cr-Co-Mo-W HEA coating with gradient structure and metallurgical bonding has a good application prospect.
引用
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页数:13
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