Composite sintered body of SIALON group having abrasion resistance and high thermal shock resistance and manufacturing method thereof

摘要

The present invention relates to a composite sintered body of a sialon group (SIALON group), a sintered body used for abrasion resistance and high temperature thermal shock resistance such as a braking or turbine blade in a casting facility for casting molten steel, and a manufacturing method thereof , -SIALON to Al₂O₃Al₂O₃And Y₂O₂In a molar ratio of 1: 2 to 3, and a composite sintered body prepared by adding BN thereto. In preparing such a sintered body, the mixture thus formed is shaped into a predetermined shape, Atmosphere at 1,600 ~ 2000C and heat treatment at 1,200 ~ 1,500C for 1 ~ 3 hours during the cooling process.