Article Rapid titanium carbide synthesis from titanium and graphite powders via ultrafast high-temperature sintering

Daiki Akutagawa ORCID ; Toshiki Sato ; Tomoharu Tokunaga ; Kiyoshi Kobayashi SAMURAI ORCID ; Takahisa Yamamoto ORCID

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Daiki Akutagawa, Toshiki Sato, Tomoharu Tokunaga, Kiyoshi Kobayashi, Takahisa Yamamoto. Rapid titanium carbide synthesis from titanium and graphite powders via ultrafast high-temperature sintering. Materials Letters. 2025, 398 (), 138890. https://doi.org/10.1016/j.matlet.2025.138890

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(abstract)

Self-propagating high-temperature synthesis (SHS) is a combustion-based method that involves a self-heating chain reaction, which is effective for rapidly producing materials with high melting points. Herein, ultrafast high-temperature sintering (UHS) was leveraged to ignite the SHS of titanium carbide (TiC) from titanium and graphite powders, and the heat generation and microstructural evolution during the process were investigated. The exothermic heat generated during TiC synthesis was confirmed, demonstrating that SHS was initiated in the initial stage of UHS. The incubation time before SHS ignition decreased with an increase in the UHS temperature above the melting point of titanium. Scanning electron microscopy revealed that fine TiC grains formed during SHS, which became denser under continued UHS. Additionally, molten Ti spread over the graphite particles during SHS, which transformed into plate-like TiC grains with elongated voids between them under subsequent heating by UHS. This structural feature was found to hinder further densification.

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Keyword: titanium carbide, graphite, ultrafast high-temperature sintering, self-propagating high-temperature synthesis

Date published: 2025-06-06

Publisher: Elsevier BV

Journal:

  • Materials Letters (ISSN: 0167577X) vol. 398 138890

Funding:

  • Core Research for Evolutional Science and Technology JPMJCR1996 (セラミックス粒界・界面における強電界ナノダイナミクス)

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1016/j.matlet.2025.138890

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Updated at: 2025-06-12 12:30:31 +0900

Published on MDR: 2025-06-12 12:21:16 +0900

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