Fabrication of Si 3N 4-based composite containing needle-like TiN synthesized using NH 3 nitridation of TiO 2 nanofiber

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

doi:10.1016/j.jeurceramsoc.2011.04.008

Fabrication of Si ₃N ₄-based composite containing needle-like TiN synthesized using NH ₃ nitridation of TiO ₂ nanofiber

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

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A Si ₃N ₄ composite containing needle-like TiN particles (7vol%) was fabricated. Needle-like TiN particles several micrometers long were synthesized using NH ₃ nitridation of TiO ₂ nanofiber, which was obtained using hydrothermal treatment. A mixed powder of α-Si ₃N ₄ and the needle-like TiN particles with additives was hot pressed at 24MPa and 1850°C for 1h in N ₂ atmosphere. Mechanical properties of the composite were compared with those of a composite containing rounded TiN particles and a monolithic β-Si ₃N ₄ ceramic. The Si ₃N ₄ matrix of the composites containing TiN was mainly a-phase, suggesting that the α-β phase transformation of Si ₃N ₄ was inhibited by the presence of TiN. Although fracture strength of the composites was lower, fracture toughness was comparable to that of monolithic β-Si ₃N ₄ ceramics. Hardness of the composites was about 19GPa and was greater than that of the monolithic β-Si ₃N ₄ ceramic.

Original language	English
Pages (from-to)	1413-1417
Number of pages	5
Journal	Journal of the European Ceramic Society
Volume	32
Issue number	7
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.04.008
Publication status	Published - 2012 Jun
Externally published	Yes

Keywords

Composite
Hot pressing
Nanofiber
Needle
Silicon nitride
Titanium nitride

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2011.04.008

Cite this

@article{6c33c20481904868bc554f00d17f1d84,

title = "Fabrication of Si 3N 4-based composite containing needle-like TiN synthesized using NH 3 nitridation of TiO 2 nanofiber",

abstract = "A Si 3N 4 composite containing needle-like TiN particles (7vol%) was fabricated. Needle-like TiN particles several micrometers long were synthesized using NH 3 nitridation of TiO 2 nanofiber, which was obtained using hydrothermal treatment. A mixed powder of α-Si 3N 4 and the needle-like TiN particles with additives was hot pressed at 24MPa and 1850°C for 1h in N 2 atmosphere. Mechanical properties of the composite were compared with those of a composite containing rounded TiN particles and a monolithic β-Si 3N 4 ceramic. The Si 3N 4 matrix of the composites containing TiN was mainly a-phase, suggesting that the α-β phase transformation of Si 3N 4 was inhibited by the presence of TiN. Although fracture strength of the composites was lower, fracture toughness was comparable to that of monolithic β-Si 3N 4 ceramics. Hardness of the composites was about 19GPa and was greater than that of the monolithic β-Si 3N 4 ceramic.",

keywords = "Composite, Hot pressing, Nanofiber, Needle, Silicon nitride, Titanium nitride",

author = "Hajime Kiyono and Yuho Miyake and Yusuke Nihei and Tomoki Tumura and Shiro Shimada",

note = "Funding Information: This study was financially supported by GCOE program of Catalysis as the Basis for the Innovation in Materials Science (Hokkaido University) and Promoting Technological Seeds program of Research for Japan Science and Technology Agency (JST). ",

year = "2012",

month = jun,

doi = "10.1016/j.jeurceramsoc.2011.04.008",

language = "English",

volume = "32",

pages = "1413--1417",

journal = "Journal of the European Ceramic Society",

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AU - Kiyono, Hajime

AU - Miyake, Yuho

AU - Nihei, Yusuke

AU - Tumura, Tomoki

AU - Shimada, Shiro

N1 - Funding Information: This study was financially supported by GCOE program of Catalysis as the Basis for the Innovation in Materials Science (Hokkaido University) and Promoting Technological Seeds program of Research for Japan Science and Technology Agency (JST).

PY - 2012/6

Y1 - 2012/6

N2 - A Si 3N 4 composite containing needle-like TiN particles (7vol%) was fabricated. Needle-like TiN particles several micrometers long were synthesized using NH 3 nitridation of TiO 2 nanofiber, which was obtained using hydrothermal treatment. A mixed powder of α-Si 3N 4 and the needle-like TiN particles with additives was hot pressed at 24MPa and 1850°C for 1h in N 2 atmosphere. Mechanical properties of the composite were compared with those of a composite containing rounded TiN particles and a monolithic β-Si 3N 4 ceramic. The Si 3N 4 matrix of the composites containing TiN was mainly a-phase, suggesting that the α-β phase transformation of Si 3N 4 was inhibited by the presence of TiN. Although fracture strength of the composites was lower, fracture toughness was comparable to that of monolithic β-Si 3N 4 ceramics. Hardness of the composites was about 19GPa and was greater than that of the monolithic β-Si 3N 4 ceramic.

AB - A Si 3N 4 composite containing needle-like TiN particles (7vol%) was fabricated. Needle-like TiN particles several micrometers long were synthesized using NH 3 nitridation of TiO 2 nanofiber, which was obtained using hydrothermal treatment. A mixed powder of α-Si 3N 4 and the needle-like TiN particles with additives was hot pressed at 24MPa and 1850°C for 1h in N 2 atmosphere. Mechanical properties of the composite were compared with those of a composite containing rounded TiN particles and a monolithic β-Si 3N 4 ceramic. The Si 3N 4 matrix of the composites containing TiN was mainly a-phase, suggesting that the α-β phase transformation of Si 3N 4 was inhibited by the presence of TiN. Although fracture strength of the composites was lower, fracture toughness was comparable to that of monolithic β-Si 3N 4 ceramics. Hardness of the composites was about 19GPa and was greater than that of the monolithic β-Si 3N 4 ceramic.

KW - Composite

KW - Hot pressing

KW - Nanofiber

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KW - Silicon nitride

KW - Titanium nitride

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