Fenmo yejin jishu (Jun 2021)

Sintering densification behavior of molybdenum tungsten alloys

  • WU Zhou,
  • WANG Na,
  • WU Ji-na,
  • ZHU Qi,
  • XI Sha,
  • ZHANG Xiao,
  • ZHANG Tie-jun,
  • AN Geng,
  • ZHOU Sha,
  • ZHANG Jun-li

DOI
https://doi.org/10.19591/j.cnki.cn11-1974/tf.2020050002
Journal volume & issue
Vol. 39, no. 3
pp. 234 – 238

Abstract

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The shrinkage and densification behavior of Mo–30W alloys sintered by spark plasma sintering (SPS) and vacuum hot pressing sintering were studied by in-situ measurement method. The results show that, the Mo–30W alloys by SPS are mainly characterized by expansion below 1200 ℃, the shrinkage of the Mo–30W alloys begins strongly above 1200 ℃, and the shrinkage tends to stop above 1600 ℃; in the cooling stage, there is a strong shrinkage of the Mo–30W alloys, and the shrinkage basically stops when the temperature is close to room temperature. The relative density of Mo–30W alloys by SPS at 1600 ℃ is over 93%, which is better than that of 89.98% by vacuum hot pressing sintering at the same temperature.

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