周期的一軸圧力下でのパルス通電焼結法によるチタン粉末の低温での高密度焼結

抄録

Low-temperature densification of titanium powder was attempted via pulse-current sintering under cyclic uniaxial pressure. The sintering was performed under cyclic or constant uniaxial pressure of 100 MPa and 200 MPa at temperatures of 400°C and 500°C. The effect of the cyclic pressure on the densification of the titanium powder was confirmed under all sintering conditions. When the sintering was performed at 400°C under a uniaxial pressure of 100 MPa, the relative density was 92.2% for sintering under cyclic pressure and as low as 77.3% for sintering under constant pressure. The relative density reached 97.7% through sintering at 500°C under a cyclic uniaxial pressure of 200 MPa. Thus, applying the cyclic uniaxial pressure during the pulse-current sintering is effective for preparing dense sintered titanium at lower temperatures.