Developing Fabrication Process of a Large-size FGM by Using LPPS

Abstract

This study was aimed at developing fabrication process of a larage-sized Functionally Gradient Mateials (FGM) by using Low Pressure Plasma Spraying (LPPS). The problem for the enlargment is the thermal distortion of substrates which occur during pre-heating and spraying. In order to solve this problem, it is neccesary to make clear the effect of substrate temperature on the distortion. This study showed that under the optimum condition, such as maximum temperature less than 600°C and temperature distribution less than 80°C of substrate during pre-heating, its distortion was successivily minimized.