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Solid State Amorphization of a Ni-B Alloy by Mechanical Alloying

Published online by Cambridge University Press:  26 February 2011

T. Nasu,
C.C. Koch,
K. Nagaoka,
M. Sakurai and
K. Suzuki
T. Nasu
Affiliation:
North Carolina State University, Department of Materials Science and Engineering, Raleigh, NC 27695
C.C. Koch
Affiliation:
North Carolina State University, Department of Materials Science and Engineering, Raleigh, NC 27695
K. Nagaoka
Affiliation:
Faculty of Education, Yamagata University, Yamagata 990, Japan
M. Sakurai
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980, Japan
K. Suzuki
Affiliation:
Faculty of Education, Yamagata University, Yamagata 990, Japan
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Abstract

The main purpose of this work was to investigate the possibility of solid state amorphization of Ni-B crystal powder. A Ni-B alloy powder was obtained by mechanical alloying of Ni and B powder using a conventional ball milling machine. X-ray diffraction and EXAFS measurements were made for the mechanically alloyed samples as a function of milling time. An amorphization reaction was observed in Ni64B36 at 400 h of milling time. The long range order of the crystalline Ni phase diminished with an increase of solution of B into the Ni matrix. This suggests that the solution of B atoms into the Ni crystalline phase, forced by mechanical alloying, plays an important role in the crystalamorphous transformation.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 205: Symposium F – Kinetics of Phase Transformations , 1990, 195
Copyright
Copyright © Materials Research Society 1992

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