SINTERED BLANC FROM BORON NITRIDE WITH CUBIC LATTICE (OPTIONS) Russian patent published in 2004 - IPC

FIELD: powder metallurgy. SUBSTANCE: invention provides sintered blanc for cutting tools from BCN, in which BCN particles are joined by binding phase. The latter has continuous two-dimensional structure and contains at least one compound selected from group comprising transition 4a, 5a, and 6a group metal carbide, nitride, carbonitride, and boride; aluminum nitride, boride, and oxide; at least one compound selected from group comprising Fe, Co, and Ni carbide, nitride, carbonitride, and boride; and their common solution. Average thickness of binding phase does not exceed 1.5 mcm. Content of BCN is 45-70 vol % and average BCN particle size is 2 to 6 mcm. Average size of binding phase can also do not exceed 1 mcm and, in this case, average BCN particle size is from 0.01 to 2 mcm. EFFECT: increased wear and roughening resistance. 4 cl, 10 tbl, 10 ex