화학공학소재연구정보센터
Journal of the American Ceramic Society, Vol.102, No.2, 621-627, 2019
Comparison of AC to DC current sources for field-assisted sintering of aluminum alloy 5083 powder
The viability of resistively sintering aluminum 5083 powder with an alternating current (AC) was explored under both as-atomized and cryomilled conditions. Samples were processed under an AC field and a direct current (DC) field. Samples processed by both methods exhibited similar microstructures and densities at different die wall temperatures. For as-atomized powders, similar densities (99% of theoretical [TD]) were achieved at die wall temperatures of 564 degrees C under DC fields and 525 degrees C under AC fields. For cryomilled 5083, densities up to 90% of theoretical were achieved at 550 degrees C under DC fields, while density values 99% of TD were achieved at 500 degrees C under AC fields. Based on these findings, it has been determined that AC fields can be used as an alternative to SPS for achieving optimal density.