Mo含量对Ti_(42.5)Zr_(42.5)Nb_(10)Ta_(5)高熵合金组织和摩擦学行为影响  

Effect of Mo Content on Microstructure and Tribological Behavior of Ti_(42.5)Zr_(42.5)Nb_(10)Ta_(5)High-Entropy Alloy

作　　者：秦家庆 靳丰硕 韩娟 雷乃义 易艳良 QIN Jia-qing;JIN Feng-shuo;HAN Juan;LEI Nai-yi;YI Yan-liang(Institute of Advance Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China;Shaoguan Research Institute,Jinan University,Shaoguan 512027,China)

机构地区：[1]暨南大学先进耐磨蚀及功能材料研究院,广东广州510632 [2]暨南大学韶关研究院,广东韶关512027

出　　处：《稀有金属与硬质合金》2025年第1期73-80,88,共9页Rare Metals and Cemented Carbides

基　　金：国家重点研发计划项目(2023YFB3710705);广东省基础与应用基础研究基金项目;(2024A1515012353);广州市科技计划项目(2024A4J4063);广东省教育厅重点领域专项(2022ZDZX)。

摘　　要：系统研究了Mo含量对(Ti_(42.5)Zr_(42.5)Nb_(10)Ta_(5))_(100-x)Mo_(x)(x=0,3,5,7)高熵合金(HEAs)微观组织、力学性能和耐磨性能的影响。结果表明:HEAs由单一BCC相构成。随着Mo摩尔分数从0增加至7%,HEAs晶格畸变程度提高,纳米硬度从(2.33±0.09)GPa提升至(4.93±0.09)GPa,洛氏硬度从(27.76±0.74)HRC提升至(40.01±0.82)HRC,维氏硬度从(247.4±6.2)HV提升至(350.1±7.4)HV,磨损率从9.85×10^(-5)mm^(3)/(N·m)降至3.5×10^(-5)mm^(3)/(N·m),下降了64.5%。磨损机制包括磨粒磨损、氧化磨损和粘着磨损。随着Mo含量增加,磨损机制从磨粒磨损逐渐转变为粘着磨损和氧化磨损。The influence of Mo content on the microstructure,mechanical properties,and wear resistance of(Ti_(42.5)Zr_(42.5)Nb_(10)Ta_(5))_(10-x)Mo_(x)(x=0,3,5,7)high-entropy alloys(HEAs)were systematically investigated.The results show that there is a single BCC phase in the HEAs.With the increase of Mo molar fraction from 0 to 7%,the lattice distortion of HEAs increases,the nanohardness increases from(2.33±0.09)GPa to(4.93±0.09)GPa,the Rockwell hardness increases from(27.76±0.74)HRC to(40.01±0.82)HRC,the Vickers hardness increases from(247.4±6.2)HV to(350.1±7.4)HV,and the wear rate decreases from 9.85×10^(-5)mm^(3)/(N·m)to 3.5×10^(-5)mm^(3)/(N·m),which decreases by 64.5%.The wear mechanisms of HEAs include abrasive wear,oxidation wear and adhesive wear.With the increase of Mo content,the wear mechanism gradually changes from abrasive wear to adhesive wear and oxidative wear.

关 键 词：高熵合金 生物医用材料 Mo 磨损机制 耐磨性 硬度 

分 类 号：TG146[一般工业技术—材料科学与工程]