TiN/Al_2O_3/Tialon comlposite was prepared by sol-gel processing of alumina sol, TiN, AIN, and Y_2O_3. The resultant composite was calcined at 900℃ and a number of test bars were cut from the composite to press uniaxially and isostatically at 20,000...
TiN/Al_2O_3/Tialon comlposite was prepared by sol-gel processing of alumina sol, TiN, AIN, and Y_2O_3. The resultant composite was calcined at 900℃ and a number of test bars were cut from the composite to press uniaxially and isostatically at 20,000 psi and to sinter at 1650℃ and 1,700℃ for one hour in nitrogen atmosphere. Examination of the bar showed the structure of the composite to be a mixure of closest packed microcrytalline materials, and its mechanical property to be available for metal cutting, abrasive, protective, and decorative object ;