caa a22 4500 388020644 CHVBK 20180307124923.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1557/JMR.1998.0352 doi S088429140004588X pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0352 Disintegration and Powder Formation of Nb75M25 (M [Elektronische Daten] Al, Si, Ga, Ge, and Sn) Due to Hydrogenation in an Arc-melting Chamber Nb75M25 (M = Al, Si, Ga, Ge, and Sn) alloy ingots were prepared by the conventional arc-melting method and then were directly reacted with high purity hydrogen of 0.1 MPa in an arc-;melting chamber without exposing the ingots to air. As the clean surface of the arc-;melted ingots is preserved, the ingots rapidly absorb a large amount of hydrogen without any activation treatments and disintegrate violently into fine particles. The disintegration of ingots depends on the M element. The collected particles are investigated by x-ray diffraction, electron microscopy, chemical analysis, and thermal analysis. The particles are hydrides of Nb75M25 after hydrogenation and have a sharp-edged polygonal appearance. After dehydriding, fine Nb3M powders with A15 crystalline structure are obtained except for Nb75Si25. In comparison with the atomized Nb3M powders, the Nb3M powders prepared by the present study have a smaller average particle size and lower impurity contents. Copyright © Materials Research Society 1998 Li Xingguo Department of Materials Science and Technology, Faculty of Engineering, Iwate University, Morioka, 020, Japan Chiba Akihiko Department of Materials Science and Technology, Faculty of Engineering, Iwate University, Morioka, 020, Japan Takahashi Seiki Department of Materials Science and Technology, Faculty of Engineering, Iwate University, Morioka, 020, Japan Ohsaki Katsuhisa Steel and Technology Development Laboratory, Nisshin Steel Co., LTD., Ichikawa, 272, Japan Journal of Materials Research Cambridge University Press 13/9(1998-09), 2526-2532 0884-2914 13:9<2526 1998 13 JMR https://doi.org/10.1557/JMR.1998.0352 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0352 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Xingguo Department of Materials Science and Technology, Faculty of Engineering, Iwate University, Morioka, 020, Japan NATIONALLICENCE 700 1- Chiba Akihiko Department of Materials Science and Technology, Faculty of Engineering, Iwate University, Morioka, 020, Japan NATIONALLICENCE 700 1- Takahashi Seiki Department of Materials Science and Technology, Faculty of Engineering, Iwate University, Morioka, 020, Japan NATIONALLICENCE 700 1- Ohsaki Katsuhisa Steel and Technology Development Laboratory, Nisshin Steel Co., LTD., Ichikawa, 272, Japan NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/9(1998-09), 2526-2532 0884-2914 13:9<2526 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge