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Spark plasma sintering of ZrB2-ZrC powder mixtures synthesized by MA-SHS in air

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タイトル: Spark plasma sintering of ZrB2-ZrC powder mixtures synthesized by MA-SHS in air
著者: Tsuchida, Takeshi 著作を一覧する
Yamamoto, Satoshi 著作を一覧する
キーワード: Mechanical activation (MA)
Self-propagating High-temperature Synthesis (SHS)
Spark plasma sintering (SPS)
Ball milling; ZrB2-ZrC composite
Zr/B/C powder mixtures
発行日: 2007年 2月
出版者: Springer
誌名: Journal of Materials Science
巻: 42
号: 3
開始ページ: 772
終了ページ: 778
出版社 DOI: 10.1007/s10853-006-0719-y
抄録: Mechanical activation-assisted self-propagating high-temperature synthesis (MA-SHS) in air was successfully applied to the synthesis of the powder mixtures of ZrB2 and ZrC as a precursor of the ZrB2–ZrC composite. When the powder mixtures of Zr/B/C = 4/2/3–6/10/1 in molar ratio were mechanically activated (MA) by ball milling for 45–60 min and then exposed to air, they self-ignited spontaneously and the self-propagating high-temperature synthesis (SHS) was occurred to form ZrB2 and ZrC. The ZrB2–ZrC composites were produced from these MA-SHS powders by spark plasma sintering (SPS) at 1800 °C for 5–10 min and showed the fine and homogeneous microstructure composed of the <5 μm-sized grains. The mechanical properties of the composites evaluated by Vickers indentation method showed the values of Vickers hardness of 13.6–17.8 GPa and fracture toughness of 2.9–5.1 MPa·m1/2, depending on the molar ratio of ZrB2/ZrC. Thus, the better microstructure and mechanical properties of the ZrB2–ZrC composites were obtained from the MA-SHS powder mixtures, compared with those obtained from the MA powder, the mixing powder and the commercial powder mixtures.
Rights: The original publication is available at
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 土田 猛


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