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Grain Refinement and Improvement in Mechanical Properties of Nb-Al-Si Intermetallic Alloys

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Title: Grain Refinement and Improvement in Mechanical Properties of Nb-Al-Si Intermetallic Alloys
Authors: Matsuura, Kiyotaka Browse this author →KAKEN DB
Kata, Dariusz Boleslaw Browse this author
Lis, Jerzy Tadeusz Browse this author
Kudoh, Masayuki Browse this author
Keywords: powder metallurgy
refractory metal
self-propagating high-temperature synthesis (SHS)
spark plasma sintering (SPS)
intermetallic compound
Issue Date: Jun-2006
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 46
Issue: 6
Start Page: 875
End Page: 879
Publisher DOI: 10.2355/isijinternational.46.875
Abstract: Nb–Al–Si intermetallic alloys having submicron crystal grains have been produced using the self-propagating high-temperature synthesis (SHS, or combustion synthesis) method followed by the bead milling technique and the spark plasma sintering (SPS) method. The intermetallic alloys were combustion-synthesized from elemental powders of niobium, aluminum and silicon, and then ball-milled and bead-milled to reduce the alloy powder particle size. The milled alloy powder was consolidated using the SPS method with a sintering time of 300 s at a sintering temperature of 1 373 K. The increase in milling time reduced the grain size of the sintered alloy. Particularly, the grain size was dramatically reduced when zirconia beads of a 0.2-mm diameter were used after milling with zirconia balls of a 10-mm diameter. The Vickers hardness, bending strength and fracture toughness of the sintered alloys increased with the decrease in grain size.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松浦 清隆

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