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Materials 2017, 10(2), 163;

Pore Formation Process of Porous Ti3SiC2 Fabricated by Reactive Sintering

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
School of Metallurgy and Environment, Central South University, Changsha 410083, China
Author to whom correspondence should be addressed.
Received: 9 January 2017 / Accepted: 6 February 2017 / Published: 10 February 2017
(This article belongs to the Special Issue Porous Ceramics)
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Porous Ti3SiC2 was fabricated with high purity, 99.4 vol %, through reactive sintering of titanium hydride (TiH2), silicon (Si) and graphite (C) elemental powders. The reaction procedures and the pore structure evolution during the sintering process were systematically studied by X-ray diffraction (XRD) and scanning electron microscope (SEM). Our results show that the formation of Ti3SiC2 from TiH2/Si/C powders experienced the following steps: firstly, TiH2 decomposed into Ti; secondly, TiC and Ti5Si3 intermediate phases were generated; finally, Ti3SiC2 was produced through the reaction of TiC, Ti5Si3 and Si. The pores formed in the synthesis procedure of porous Ti3SiC2 ceramics are derived from the following aspects: interstitial pores left during the pressing procedure; pores formed because of the TiH2 decomposition; pores formed through the reactions between Ti and Si and Ti and C powders; and the pores produced accompanying the final phase synthesized during the high temperature sintering process. View Full-Text
Keywords: Ti3SiC2; metal ceramic; porous; reaction procedure; pore formation process Ti3SiC2; metal ceramic; porous; reaction procedure; pore formation process

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Zhang, H.; Liu, X.; Jiang, Y. Pore Formation Process of Porous Ti3SiC2 Fabricated by Reactive Sintering. Materials 2017, 10, 163.

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