METHOD OF RECEIVING OF COMPOSITE CERAMIC POWDER ON BASIS OF SILICIUM NITRIDE AND TITANIUM NITRIDE

摘要

FIELD: metallurgy.;SUBSTANCE: there is prepared exothermal mixture by blending of grinned up to particles size not more than 0.1 mm of ferrosilicium, containing 65-95 wt % silicon, ilmenite, containing 60-65 wt % titanium dioxide, and previously azotized ferrosilicium, at ratio of component in mixture, wt %: ferrosilicium - 40-55, ilmenite - 20-40, azotised ferrosilicium - 25-40. Received mixture is ignited at nitrogen pressure 2-20 MPa. It is implemented after nitride hardening of mixture at nitrogen pressure 0.1-10 MPa during 30-40 minutes and its following grinding. Then grinded product is subject to magnetic separation, after what it is treated 15-30% solution of hydrochloric acid.;EFFECT: reduction of first cost of final product at keeping of high hardness, durability.;4 cl, 1 tbl, 1 ex