METHOD FOR MANUFACTURING CERAMIC ARTICLE BASED ON BORON NITRIDE

摘要

FIELD: methods for production of ceramic articles based on boron nitride. SUBSTANCE: method involves treatment of finely dispersed powder on BN to reduce content of oxygen down to 5-8% (mezographic BN): washing of heat treated powder and mixing with 5-50% of finely dispersed metal powder; forming of mixture to impart the required shape; pressing of the blank by blast in hydrodynamic plant, and reaction sintering. Article is placed into powder mixture of BN and SiC and subjected to heat treatment to absorb residual BO. Then article is impregnated with low-viscosity oligomers of methyl silanes featuring high yield of SiC in pyrolysis, and article is subjected to heat treatment to fill pores with SiC uniformly over the entire area of article. EFFECT: higher efficiency.