Comparative study of microstructural characteristics of PM sintering and plasma spraying coating on a steel surface

摘要

In this paper, a comparative study has been made between microstructural characteristics in coatings prepared by PM sintering and air plasma spray technique. Some significant results have been achieved. Firstly, wear-resistant coatings can be commonly achieved through these two techniques. Secondly, microstructural morphologies of these two coatings are obviously different, fully dense structure prevails in the PM sintering coating while bedded grain defective structure exists in the air plasma spray coatings. Thirdly, PM coating possesses finer, much thicker and more homogeneous microstructure than air plasma spray coating does.