Localized pore evolution assisted densification during spark plasma sintering of nanocrystalline W-5wt.%Mo alloy
arXiv:2006.02340 · doi:10.1016/j.scriptamat.2018.09.013
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.
13 pages, 4 figures