Effect of CNT addition and its orientation on thermal shock resistance of B4C/CNT composites fabricated by hot-pressing

Ryosuke S.S. Maki*, Fajar Muhammad, Jelena Maletaskic, Anna V. Gubarevich, Katsumi Yoshida, Toyohiko Yano, Tohru S. Suzuki, Tetsuo Uchikoshi

*この研究の対応する著者

研究成果: Article査読

抄録

This paper describes the synthesis of B4C/carbon nanotube (CNT) composite by hot-pressing and shows the details for the effectiveness of CNT addition, additive amount and its orientation on the thermal shock resistance. CNTs tend to array perpendicular to the hot-pressing direction, which caused anisotropic mechanical and thermal properties of B4C/CNT composite. We investigated the residual bending strength of thermally shocked B4C/CNT composites and determined the critical temperature ΔTC that causes precipitous strength drop. In the case of B4C/15 vol% CNT composite, the residual bending strength almost unchanged at ~450°C; ΔTC increased by 150°C or more than that of monolithic B4C. Based on the thermal stress fracture-resistance parameter R’ of the composites, it was clarified that the excellent R’ is mainly due to the higher thermal conductivity and lower elastic modulus. The numerical results showed that CNT addition has a pronounced effect on the thermal shock residual bending strength and thermal stress fracture-resistance of B4C/CNT composite.

本文言語English
ページ(範囲)370-377
ページ数8
ジャーナルJournal of Asian Ceramic Societies
10
2
DOI
出版ステータスPublished - 2022
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料

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