In situ observation of phase transformation of powder sintering from Ni/TiH2 using neutron diffraction

Gang Chen, Klaus Dieter Liss, Peng Cao*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The utilisation of TiH2 powder in titanium and its alloys sintering has been receiving increasing interest. This study presents an in situ observation of phase transformation in blended TiH2 and Ni powders sintering using neutron diffraction. Densification and microstructure of the as-sintered NiTi alloy, and the hydrogen release during sintering is reported. The sintering mechanism involving the use of TiH2 is discussed for synthesizing NiTi shape memory alloy. The sintered porous alloy has 26.9 % open porosity and exhibits volumetric shrinkage. The predominant phase identified in the produced NiTi alloys sintered at 1373 K is B2 NiTi phase with the presence of other minor phases.

Original languageEnglish
Title of host publicationTMS 2014 - 143rd Annual Meeting and Exhibition, Supplemental Proceedings
PublisherMinerals, Metals and Materials Society
Pages967-973
Number of pages7
ISBN (Print)9781118889725
DOIs
StatePublished - 2014
Externally publishedYes
Event143rd Annual Meeting and Exhibition, TMS 2014 - San Diego, CA, United States
Duration: 16 Feb 201420 Feb 2014

Publication series

NameTMS Annual Meeting

Conference

Conference143rd Annual Meeting and Exhibition, TMS 2014
CountryUnited States
CitySan Diego, CA
Period16/02/1420/02/14

Keywords

  • Dehydrogenation
  • Neutron diffraction
  • NiTi

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