Fabrication of Si3N4-based composite containing needle-like TiN synthesized using NH3 nitridation of TiO2 nanofiber

Kiyono, Hajime; Miyake, Yuho; Nihei, Yusuke; Tumura, Tomoki; Shimada, Shiro

Fabrication of Si3N4-based composite containing needle-like TiN synthesized using NH3 nitridation of TiO2 nanofiber

Kiyono, Hajime; Miyake, Yuho; Nihei, Yusuke et al.

Journal of the European Ceramic Society, 2012, 32(7), 1413-1417

Permalink : https://hdl.handle.net/2115/49351

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アクセス権	open access
URI	https://hdl.handle.net/2115/49351
タイトル	Fabrication of Si3N4-based composite containing needle-like TiN synthesized using NH3 nitridation of TiO2 nanofiber
著者	Kiyono, Hajime ; Miyake, Yuho ; Nihei, Yusuke ; Tumura, Tomoki ; Shimada, Shiro
e-Rad_Researcher 50281788 著者名 Kiyono, Hajime
著者名 Miyake, Yuho
著者名 Nihei, Yusuke
著者名 Tumura, Tomoki
e-Rad_Researcher 90002310 著者名 Shimada, Shiro
言語	英語
キーワード	Composite
	Titanium nitride
	Silicon nitride
	Needle
	Nanofiber
	Hot pressing
発行日	2012-06
出版者	Elsevier
収録物名	Journal of the European Ceramic Society
巻(号)	32(7)
ページ	1413-1417
抄録	A Si3N4 composite containing needle-like TiN particles (7 vol%) was fabricated. Needle-like TiN particles several micrometers long were synthesized using NH3 nitridation of TiO2 nanofiber, which was obtained using hydrothermal treatment. A mixed powder of α-Si3N4 and the needle-like TiN particles with additives was hot pressed at 24 MPa and 1850℃ for 1 h in N2 atmosphere. Mechanical properties of the composite were compared with those of a composite containing rounded TiN particles and a monolithic β-Si3N4 ceramic. The Si3N4 matrix of the composites containing TiN was mainly a-phase, suggesting that the α-β phase transformation of Si3N4 was inhibited by the presence of TiN. Although fracture strength of the composites was lower, fracture toughness was comparable to that of monolithic β-Si3N4 ceramics. Hardness of the composites was about 19GPa and was greater than that of the monolithic β-Si3N4 ceramic.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0955-2219
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jeurceramsoc.2011.04.008