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Formation of Bulk Glassy Fe75–x–yCrxMoyC15B10 Alloys and Their Corrosion Behavior

Published online by Cambridge University Press:  31 January 2011

Shujie Pang ,
Tao Zhang ,
Katsuhiko Asami  and
Akihisa Inoue
Shujie Pang
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
Tao Zhang
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
Katsuhiko Asami
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
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Abstract

Formation of bulk Fe-based glassy alloys with high corrosion resistance was succeeded in the Fe75–x–yCrxMoyC15B10 alloy system. A large temperature interval of supercooled liquid region (ΔTx) of 40–90 K was obtained over a wide composition range for the Fe75?x–yCrxMoyC15B10 alloys. The Fe75–x–yCrxMoyC15B10 alloys were prepared in a bulk glassy form with diameters of 1.0–2.5 mm by copper mold casting. The bulk glassy Fe75–x–yCrxMoyC15B10 alloys exhibited high corrosion resistance in 1 N HCl solution. The glassy alloys containing Cr were spontaneously passivated with a wide passive region before the transpassive dissolution of Cr. The passive current density decreased significantly with an increase of alloying Cr content, indicating that the addition of Cr was effective on enhancing the corrosion resistance. Excess addition of Mo for replacing Fe in the present alloys was detrimental for the corrosion resistance.

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Articles
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Journal of Materials Research , Volume 17 , Issue 3 , March 2002 , pp. 701 - 704
Copyright
Copyright © Materials Research Society 2002

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