Neutron diffraction investigation of vacuum sintering in a binary Fe/Mn powder mixture

Zhigang Xu, Klaus Dieter Liss, Michael A. Hodgson, Keke Chang, Gang Chen, Muhammad D. Hayat, Xiaowen Yuan, Peng Cao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


This study investigated the sublimation of Mn and microstructural evolution of binary Fe/Mn compacts sintered at various temperatures in a vacuum. A high sintering temperature or a lengthy holding time promotes powder densification. Due to sublimation of Mn, the weight loss of the compacts mainly occurs during the isothermal holding stage of the sintering process; it increases significantly from 1.5 wt.% for sintering at 1000 °C to 8.6 wt.% at 1200 °C. For the first time, the phase evolution in the binary elemental compacts was clarified using in situ neutron diffraction. The γ-austenite phase emerges during temperature ramping to 536 °C, while β-Mn and α-Fe disappear at 774 °C and 881 °C. The neutron diffraction also revealed that single phase γ-austenite forms in the Fe-Mn compacts if the temperature is ≥ 881 °C.

Original languageEnglish
Pages (from-to)563-571
Number of pages9
JournalJournal of Alloys and Compounds
StatePublished - 5 Nov 2018


  • Fe-Mn alloys
  • Microstructure
  • Mn sublimation
  • Neutron diffraction
  • Phase transformation
  • Sintering


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