摘要
高熵合金(High-Entropy Alloys, HEAs)因其兼备优越的力学和电化学性能,得到研究者关注。激光熔覆可在基材表面熔覆具有特种功能的涂层,使单一材质材料成为功能梯度复合材料,通过激光熔覆在材料表面制备HEAs涂层,可显著提升材料表面硬度、高温力学性能和耐腐蚀性,延长服役寿命。概述了合金成分及含量对激光熔覆HEAs涂层硬度、耐磨性、耐腐蚀性等性能的影响及其机理,总结了激光熔覆制备HEAs涂层面临的挑战,展望了激光熔覆HEAs涂层的应用前景和发展方向。
High-entropy alloys(HEAs) have been the focus of research in academia and industry due to the excellent mechanical and electrochemical properties. Coatings with special functions can be cladded on the substrate surface by laser cladding, making single material become functional gradient composite. HEAs coating on the surface can significantly improve the surface hardness, high-temperature mechanical properties and corrosion resistance of the material, prolonging the service life. The effects of alloy composition and content on the hardness, wear resistance and corrosion resistance of laser cladding HEAs coatings as well as the mechanism were reviewed.The challenges of laser cladding HEAs coatings were summarized, and the application as well as development direction of laser cladding HEAs coatings was prospected.
作者
刘卫东
米国发
李雷
Liu Weidong;Mi Guofa;Li Lei(School of Materials Science and Engineering,Henan Polytechnic University;School of Materials,Shanghai Dianji University)
出处
《特种铸造及有色合金》
CAS
北大核心
2022年第7期847-855,共9页
Special Casting & Nonferrous Alloys
基金
上海市科委“科技创新行动计划”重大专项基金资助项目(19511105402)
关键词
激光熔覆
高熵合金
力学性能
耐腐蚀性能
微观组织
Laser Cladding
High-entropy Alloys(HEAs)
Mechanical Properties
Corrosion Resistance
Microstructure
