Preparation of W-B-C System Composites by Arc Melting and their Thermoelectric Properties

Takashi Goto; Li Jianhui; Toshio Hirai

doi:10.2497/jjspm.42.1406

Preparation of W-B-C System Composites by Arc Melting and their Thermoelectric Properties

Takashi Goto, Li Jianhui, Toshio Hirai

金属材料研究所・材料プロセス・評価研究部

研究成果: Article › 査読

抄録

W-B-C system composites were prepared by arc melting in an argon atmosphere using B₄C, WC, WB, B and C powders. Lamella textures indicating eutectic reaction were observed at B₄C contents of about 20mol% and 10mol% in the quasi-binary W₂B₅-B₄C and WB₄-B₄C systems, respectively. Carbon phase in the W₂B-B₄C-C ternary system was needle-like. The Seebeck coefficient (α) generally decreased with increasing W₂B₅ and WB₄ contents. However, the W₂B₅-B₄C composites containing 2mol%W₂B₅ have slightly greater α values than those of B₄C in the temperatures range between 200 and 1000K. The electrical (σ) and thermal conductivities (κ) increase with increasing W₂B₅ and WB₄ contents. The figure of merit values (Z) increased with increasing temperature. The W₂B₅-B₄C composites containing 2mol%W₂B₅ showed slightly greater Z values than B₄C at temperatures between 200 and 1000K. The highest ZT value at T=1000K was about 0.1.

本文言語	English
ページ（範囲）	1406-1410
ページ数	5
ジャーナル	journal of the japan society of powder and powder metallurgy
巻	42
号	12
DOI	https://doi.org/10.2497/jjspm.42.1406
出版ステータス	Published - 1995 1 1

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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10.2497/jjspm.42.1406

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引用スタイル

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AB - W-B-C system composites were prepared by arc melting in an argon atmosphere using B4C, WC, WB, B and C powders. Lamella textures indicating eutectic reaction were observed at B4C contents of about 20mol% and 10mol% in the quasi-binary W2B5-B4C and WB4-B4C systems, respectively. Carbon phase in the W2B-B4C-C ternary system was needle-like. The Seebeck coefficient (α) generally decreased with increasing W2B5 and WB4 contents. However, the W2B5-B4C composites containing 2mol%W2B5 have slightly greater α values than those of B4C in the temperatures range between 200 and 1000K. The electrical (σ) and thermal conductivities (κ) increase with increasing W2B5 and WB4 contents. The figure of merit values (Z) increased with increasing temperature. The W2B5-B4C composites containing 2mol%W2B5 showed slightly greater Z values than B4C at temperatures between 200 and 1000K. The highest ZT value at T=1000K was about 0.1.

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