摘要
稀土元素具有特殊的电子结构,对材料表面有着优异的改性潜力,在表面工程技术领域具有很好的应用前景。综述了稀土元素在化学热处理、激光熔覆、离子注入、真空等离子体镀膜、热喷涂等技术中对工艺过程的影响和提高材料表面改性层抗高温氧化和耐蚀性能的效果。稀土元素在改性层中的作用机理为:稀土元素的微合金化作用,改变了改性层中第二相或夹杂物的形态与性能,改性层组织细化和结构因素,是材料表面改性层抗高温氧化和耐蚀性能得到改善的主要原因。
With a view to the potential and promising application of rare earth elements with special electronic structure in surface engineering, a review was given on the influence of rare earth on the processing techniques and improvement in high temperature oxidation resistance and corrosion resistance of surface modification coatings prepared by chemical heat treatment, laser cladding, ion implantation, vacuum plasma plating, and thermal spraying technology. The mechanisms of rare earth on the properties of the modification coatings were briefly introduced. It was pointed out that rare earth plays an important role in micro alloying, which led to the changes in the morphology, microstructure refining, and phase structure of the surface modification coatings and hence improved the properties of the coatings.
出处
《材料保护》
CAS
CSCD
北大核心
2005年第8期35-38,共4页
Materials Protection
关键词
表面改性
稀土元素
材料
高温抗氧化性
耐腐蚀性
surface modification
rare earth element
material
high temperature oxidation resistance
corrosion resistance
