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Changes in the microstructural state of Ti-Al-Nb-based alloys depending on the temperature cycle during spark plasma sintering

Authors
  • Kozhakhmetov, Yernat
  • Skakov, Mazhyn
  • Mukhamedova, Nuriya
  • Kurbanbekov, Sherzod
  • Ramankulov, Sherzod
  • Wieleba, Wojciech
Type
Published Article
Journal
Materials Testing
Publisher
De Gruyter
Publication Date
Feb 23, 2021
Volume
63
Issue
2
Pages
119–123
Identifiers
DOI: 10.1515/mt-2020-0017
Source
De Gruyter
Keywords
License
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Abstract

This article presents results of the study on the dependence of the structural-phase state of alloys based on Ti-12.52Al-43.08Nb system (wt.-%) on the temperature of spark plasma sintering. It has been established that spark plasma sintering of Ti-Al-Nb alloys under the temperature of 1500 °C resulted in melting the aluminum component of the mixture that, in turn, negatively affects the quality of ready products. It has also been shown that stepping up the sintering temperature from 1000 °C to 1300 °C leads to increasing volume fraction of O-phase up to 49.63 % due to rapid precipitation of O-phase from B2-phase and Ti3Al-phase. It has been revealed that intermetallic composites obtained under the temperature of 1300 °C are characterized by a dominant two-phase В2+О structure which is more suitable for strengthening sorption properties of hydrogen-storing materials based on Ti-Al-Nb.

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