摘要
使用氩弧熔覆制备不同碳含量Al_(0.5)Co_(0.5)NiCrFe高熵合金涂层,研究碳含量对Al_(0.5)Co_(0.5)NiCrFe高熵合金涂层组织与性能的影响。结果表明:碳加入后,高熵合金均由单一的FCC结构组成,并没有表征出其他物质,但根据高熵合金显微组织与能谱分析可以发现,高熵合金的枝晶间有碳铬化合物生成。高熵合金涂层的组织为典型的树枝晶结构,随着碳含量的增加,组织不断细化。随碳含量的增加,高熵合金涂层的硬度不断升高,当碳含量为4%时,硬度(383.2 HV0.5)和耐磨性均为最佳。随碳含量的不断增加,高熵合金的耐腐蚀性先增强后减弱,碳含量为2%时耐腐蚀性最佳。根据单位面积氧化增量,高熵合金的抗氧化性先增大后减小,当碳含量为2%时,抗氧化性最佳。
Al_(0.5)Co_(0.5)NiCrFe high-entropy alloy coatings with different carbon contents were prepared by argon arc cladding,and effect of carbon content on the microstructure and properties of the Al_(0.5)Co_(0.5)NiCrFe high-entropy alloy coating was studied.The results show that after the addition of carbon,the high-entropy alloys are all composed of a single FCC structure,and no other structure are characterized.However,according to the microstructure and energy spectrum analysis of the high-entropy alloy,it can be found that there is carbon and chromium between the dendrites of the high-entropy alloy.The microstructure of the high-entropy alloy coating is a typical dendritic structure,and the microstructure is continuously refined with the increase of carbon content.With the increase of carbon content,the hardness of high-entropy alloy coating increases continuously.When the carbon content is 4%,the highest hardness is 383.2 HV0.5,and the wear resistance is also the best.With the continuous increase of carbon content,the corrosion resistance of high-entropy alloy first increases and then weakens,and when the carbon content is 2%,corrosion resistance is the best.According to the oxidation mass gain per unit area,the oxidation resistance of the high-entropy alloy first increases and then decreases.When the carbon content is 2%,the coating has the best oxidation resistance.
作者
时海芳
李强
Shi Haifang;Li Qiang(School of Materials Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第3期136-141,共6页
Heat Treatment of Metals
关键词
高熵合金涂层
耐磨性
耐腐蚀性
抗氧化性
high-entropy alloy coating
wear resistance
corrosion resistance
oxidation resistance
