SETTER MATERIAL FOR MIM COATED WITH INORGANIC COATING AGENT AND ITS PRODUCTION

摘要

PURPOSE:To provide an improved setter material for MIM (metal powder injection molding), imparted with excellent surface characteristics to resist the reaction with the raw material for MIM and having light weight and excellent processability, heat-resistance and thermal shock resistance and to provide a process for producing the setter material. CONSTITUTION:A surface of a setter material for MIM is coated with an inorganic coating agent produced by mixing a binder to a zirconia-based material containing >=10wt.% of zirconia. Preferably, the zirconia-based material is a carbonaceous setter material and the binder is an inorganic polymer resistant to decomposition at high temperature and dryable at 18-400 deg.C. Ceramic particle aggregate produced by finely pulverizing and classifying the zirconia material is mixed with a binder composed of inorganic polymer, the obtained coating agent is applied to a carbonaceous setter material and the coating layer is dried at 18-400 deg.C to obtain the coated setter material.