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Fabrication of SPS compacts from NbC-NbB2 powder mixtures synthesized by the MA-SHS in air process

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タイトル: Fabrication of SPS compacts from NbC-NbB2 powder mixtures synthesized by the MA-SHS in air process
著者: Tsuchida, T 著作を一覧する
Kakuta, T 著作を一覧する
キーワード: Mechanical activation (MA)
Nb/B/C powder mixtures
Self-propagating high-temperature synthesis(SHS)
Vickers hardness
Spark plasma sintering (SPS)
Ball milling
NbC/NbB2 composite
発行日: 2006年 5月18日
出版者: Elsevier
誌名: Journal of Alloys and Compounds
巻: 415
号: 1-2
開始ページ: 156
終了ページ: 161
出版社 DOI: 10.1016/j.jallcom.2005.08.012
抄録: When the powder mixture of Nb/B/C = 2/2/1 in molar ratio was mechanically activated (MA) by ball milling for 105 min and then exposed to air, it self-ignited spontaneously and the self-propagating high-temperature synthesis (SHS) was induced. The powder mixture of NbC and NbB2 was obtained by this MA–SHS in air process and then sintered by spark plasma sintering (SPS) at a temperature as low as 1800 °C. The sintered NbC/NbB2 composite compact showed the fine, homogeneous microstructure consisting of the a few μm-sized grains and the Vickers hardness of 19.8 GPa, which was higher than 14.3 and 16.6 GPa for the NbC/NbB2 composite compacts sintered from the powder mixture of Nb/B/C = 2/2/1 without MA–SHS and from the commercial powder mixture of NbC/NbB2 = 1/1.
Relation (URI): http://www.sciencedirect.com/science/journal/09258388
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/13464
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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