Localized pore evolution assisted densification during spark plasma sintering of nanocrystalline W-5wt.%Mo alloy
Abstract
The present work reports the role of different atomic mobility induced localized pore evolution on densification during spark plasma sintering of nanocrystalline W-Mo alloy powder. The shrinkage (or expansion) behavior of cold compacted milled powders was studied using dilatometry during non-isothermal sintering up to 1600 C. Subsequently, the milled powders were densified to ~95% relative density using spark plasma sintering up to 1600 C. The enhanced localized Joule heating due to dynamically evolved porous structure could be attributed for the densification during spark plasma sintering.
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