粉末粒径对真空等离子体喷涂钛涂层的影响

粉末粒径是影响等离子体喷涂涂层结构和性能的主要因素之一。本文采用四种不同粒径分布的钛粉,通过真空等离子体喷涂（VPS）工艺在不锈钢基体上制备了粗糙多孔的钛涂层,研究了粉末粒径与钛涂层表面粗糙度、气孔率和结合强度间的关系。结果表明：在粉末熔融状况良好的情况下,不同粒径分布的钛粉制备的涂层结构均较均匀;钛涂层的表面粗糙度和气孔率随粉末粒径的增大而增大,涂层结合强度随粉末粒径增大而减小。

Effects of Particle Size on Vaccum Plasma Spraying Titanium Coatings

Particle size of feedstock is one of the main factors to affect the structure and properties of plasma sprayed coatings. Four different particle sizes of titanium powders were used to deposite titanium coatings onto stainless steel substrate via vacuum plasma spraying （VPS）. The relationship between particle size and properties of the fabricated coatings including surface roughness, bonding strength and porosity was investigated. The results obtained showed that the titanium coatings prepared by four different particle sizes possessed similar structure while the feedstock were molten well during plasma spraying process. When the particle size was increased, the surface roughness and oorositv of the coatings increased correspondingly and the bonding strength decreased.