ABRASION RESISTANT ARTICLES BASED ON SILICON NITRIDE

摘要

23042 ABRASION RESISTANT ARTICLES BASED ON SILICON NITRIDE A composite article and cutting tool are prepared by densification to form a body consisting essentially of particles of hard refractory material uniformly distributed in a matrix consisting essentially of a first phase and a second phase, said first phase consisting essentially of crystalline silicon nitride and said second phase being an intergranular refractory phase comprising silicon nitride and a suitable densification aid comprising magnesium oxide and silicon dioxide.