PURPOSE: To obtain the material which allows high-density recording and high- speed information transmission by dispersing a metal nitride, metal carbonitride, metal carbide particles, and carbon at prescribed porosity into a sintered body and impregnating a lubricant into the pores thereof.
CONSTITUTION: The particles and/or whiskers of a metal carbide (hereafter A) and a molding consisting of metallic powder (hereafter B) are heated in a nitridable gaseous atmosphere to form the B metal nitride by reaction of the B with the nitrogen. The A simultaneously reacts with the nitrogen and changes to the A metal nitride or A metal carbonitride and to form free carbon. A part of this free carbon and the B react to form the B metal carbide particles. These products are dispersed into the sintered body, by which the carbon dispersion reaction sintered composite ceramics having ≤10vol.% porosity and ≤5μm max. pore size is obtd. The lubricant is impregnated into the pores of such material, by which the material having an excellent sliding characteristic is obtd.
YASUTOMI YOSHIYUKI
SOFUE MASAHISA
GOTO AKIHIRO
HIGUCHI SHINSUKE
SAITO SUKEO
