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The synthesis of NbSi2 by mechanical alloying

Published online by Cambridge University Press:  31 January 2011

Taiping Lou ,
Guojiang Fan ,
Bingzhe Ding  and
Zhuangqi Hu
Taiping Lou
Affiliation:
National Key Lab for RSA, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
Guojiang Fan
Affiliation:
National Key Lab for RSA, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
Bingzhe Ding
Affiliation:
National Key Lab for RSA, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
Zhuangqi Hu
Affiliation:
National Key Lab for RSA, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
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Abstract

The stoichiometric intermetallic compound NbSi2 has been synthesized by mechanical alloying (MA) elemental Nb and Si powders. The alloying process has been investigated by means of x-ray diffraction (XRD) and differential scanning calorimetry (DSC). It was found that the formation of the Nb2Si intermetallic compound occurs abruptly after 65 min of milling without any interruptions during the alloying process. However, short interruptions at a 5 min interval during ball milling result in a gradual reaction for the formation of the NbSi2 compound as well as a new metastable bcc structured solid solution. We conclude that the temperature rise during mechanical alloying plays an important role in initiating the abrupt reaction after an incubation milling time.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 5 , May 1997 , pp. 1172 - 1175
Copyright
Copyright © Materials Research Society 1997

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