Reactive hot pressing of TiC0.5 ceramic at low applied pressure with 1 wt Ni additive

Kannan, R and Rangaraj, L and Jayaram, V (2021) Reactive hot pressing of TiC0.5 ceramic at low applied pressure with 1 wt Ni additive. In: Journal of the American Ceramic Society .

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Abstract

Densification in non-stoichiometric TiC0.5 ceramic has been studied by reactive hot pressing (RHP) of Ti:0.5C composition at 4�40 MPa, 1200°C for 60 min. Incomplete reaction and 94 relative density (RD) at a pressure of 4 MPa changed to 99 RD and a negligible amount of residual Ti at 40 MPa. In contrast, the addition of 1 wt Ni in the starting Ti-0.5C powder mixture resulted in full density at a lower pressure of 4 MPa, leading to comparable hardness. It is argued that both, reaction as well as densification, were improved by the formation of transient Ti-Ni liquid phase. The enhanced RD and residual metallic phase in the nickel-containing non-stoichiometric TiC0.5 showed high flexural strength (537 ± 79 MPa), which is comparable to values obtained from materials processed at high temperature and pressure. © 2021 The American Ceramic Society

Item Type:	Journal Article
Publication:	Journal of the American Ceramic Society
Publisher:	Blackwell Publishing Inc.
Additional Information:	The copyright for this article belongs to Blackwell Publishing Inc.
Keywords:	Hot pressing, Applied pressure; High flexural strength; High temperature and pressure; Nickel containing; Non-stoichiometric; Powder mixtures; Reactive hot pressing; Relative density, Nickel
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	30 Aug 2021 09:09
Last Modified:	30 Aug 2021 09:09
URI:	http://eprints.iisc.ac.in/id/eprint/69548

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