Influence of the CIP Pressure for the Mechanical and Electrical Properties of Pressure-less Sintered TiN Ceramics
抄録
The pure TiN ceramic compacts were manufactured by the pressure-less sintering method from pure TiN powders with no additives. The ball-milled TiN powders were pre-formed at a uni-axial pressure of 100MPa, and then CIPed (Cold iso-static pressured) at 0, 50, 100, 200, 300 and 350MPa, respectively. The green compacts were sintered at 2100℃ for 2h in ambient pure Ar gas. The sintered compacts had a relative density of 87.6～89.6%, linear contraction coefficient of 12.2～13.6%, hardness of 12.3～20.0GPa, tensile stress of 79.3～146.3MPa, tensile strain of 124～230με, Young's modulus of 313～366GPa, Rigidity of 131～150GPa, Poisson's ratio of 0.19～0.24 and electrical conductivity of 1.83～2.12MS m^<-1>". The ceramics is expected to be used as a ceramic mold material that can be machined by electrical discharge and as electro-conductive high-temperature structural materials.
常圧焼結TiNセラミックスの機械的及び電気的特性に及ぼすCIP成形圧の影響
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