Reaction synthesis mechanism of TiAl alloy fabricated by hot pressed sintering with mixed powders of TiH2 and aluminum

  • Dongli Sun
  • , Wanli Gu
  • , Qing Wang
  • , Xiuli Han
  • , Gaohui Wu
  • , J. Wang

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

Abstract

Ti-47Al(at.%) alloys were fabricated through hot pressed sintering using mixed powders of TiH2 and Al and mixed powders of Ti and Al, respectively, as starting materials. The microstructure of alloys were analysed by differencial thermal analysis (DTA),scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the mechanism of the sintering process were studied. Through the experiment it is found that TiH2 powders have been decomposed to Ti and H2 completely before they react with Al powders during the hot press synthesis. The reaction of TiH2 and Al powders is faster than that of Ti and Al powders during the process of hot press synthesis because Ti formed from the decomposition of TiH2 powder has higher activity.

Original languageEnglish
Title of host publication8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
PublisherJohn Wiley and Sons Inc
Pages463-467
Number of pages5
ISBN (Print)9781632660008
DOIs
StatePublished - 2013
Event8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8 - Waikoloa, HI, United States
Duration: 4 Aug 20139 Aug 2013

Publication series

Name8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
Volume1

Conference

Conference8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
Country/TerritoryUnited States
CityWaikoloa, HI
Period4/08/139/08/13

Keywords

  • Microstructure
  • Synthesis
  • Ti-Al alloy
  • TiH2 powders

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