Journal of the Japan Society of Powder and Powder Metallurgy
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
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Low-Temperature Densification of Titanium Powder by Pulse-Current Sintering under Cyclic Uniaxial Pressure
Ayako SUZUKIKotaro KIKUCHIKosuke NAKANOHiroyuki KITAGAWA
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JOURNAL OPEN ACCESS

2020 Volume 67 Issue 10 Pages 525-528

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Abstract

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.

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