A Study on the Precursor System for Ti–Al–C MAX Phase

Autor: Sreejith K. J., Vipin Vijay, Jayalatha T.
Rok vydání: 2020
Předmět:
Zdroj: Transactions of the Indian National Academy of Engineering. 6:87-93
ISSN: 2662-5423
2662-5415
DOI: 10.1007/s41403-020-00181-z
Popis: MAX phase materials are nano-layered, hexagonal, machinable, early transition-metal carbides, and nitrides, where M is an early transition metal, A is an A-group element (mostly groups 13 and 14), and X is C and/or N. These phases exhibit a unique combination of both metallic and ceramic properties. The present paper reports a study on the precursor system for preparing Ti–Al–C MAX phases. Reactive fillers incorporated carbonaceous polymer slurries were prepared in varying molar ratios of Ti:Al. The effects of the Ti:Al molar ratio and heat treatment temperature on the Ti–Al–C phase formation were investigated. Phase evolution and morphology of the precursor derived ceramics were analyzed using powder X-ray diffraction and scanning electron microscopy techniques respectively. Laminar nature of the MAX material was identified using Scanning Electron Microscopy and HR-TEM. It is found that the pressure-less, precursor route is capable of producing Ti–Al–C MAX phases. It is also found that titanium rich precursor composition favours the formation of Ti–Al–C MAX phases, whereas an aluminum rich composition favours the formation of titanium aluminides.
Databáze: OpenAIRE
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