Ni60对AlCoCuFeMnNi高熵合金涂层的影响  

Effect of Ni60 on AlCoCuFeMnNi high-entropy alloy coating

作　　者：彭竹琴[1] 李俊魁 张国涛 秦芹 刘孟柯 吴玉萍[3] 

机构地区：[1]中原工学院材料与化工学院,河南郑州450007 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [3]河海大学力学与材料学院,江苏南京210098

出　　处：《金属热处理》2017年第9期191-194,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(51579087);郑州市科技攻关项目(131PPTGG416-2)

摘　　要：采用等离子熔覆技术,在Q235钢基体上制备了添加Ni60合金的AlCoCuFeMnNi高熵合金涂层。利用XRD,SEM和EDS研究了涂层的显微组织和相组成,并测试了其显微硬度。结果表明,合金涂层主要由BCC枝晶和FCC枝晶间组织构成,添加Ni60后枝晶间还生成了长条状的Cr_7C_3相,枝晶内的Cr_7C_3相为颗粒状。添加Ni60后涂层硬度最大值达到690 HV0.2,明显高于未添加Ni60涂层的370 HV0.2,涂层硬度提高的主要原因是添加Ni60后涂层中生成了硬质相Cr_7C_3。To obtain high performance high-entropy alloys, a Ni60 ＋ A1CoCuFeMnNi high-entropy cladding layer was prepared by means of plasma cladding technology on Q235 steel. The characteristics including microstructure, phase composition and microhardness were investigated by using XRD, SEM, EDS and microhardness tester, respectively. The research results indicate that the coating is mainly composed of FCC interdendritic and BCC dendritic structure, where exists stripy Cr7 C3 and particle Cr7 C3 respectively with the addition Ni60 powder. The maximum microhardness of the coating which added Ni60 alloy is 690 HV0.2, significantly higher than that without Ni60 alloy （ 370 HV0.2）. The formation of the hard phase Cr7 C3 is the main reason for the microhardness increase of the coating.

关 键 词：高熵合金 Ni60粉末 显微组织 显微硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]