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Reverse martensitic phase transformation induced in Nb–Co multilayers by ion irradiation

Published online by Cambridge University Press:  03 March 2011

B.X. Liu  and
Z.J. Zhang
B.X. Liu
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Z.J. Zhang
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Abstract

A reverse martensitic phase transformation was observed in Nb-enriched Nb-Co multilayers induced by room temperature 200 ke V xenon ion mixing. Further experiments revealed that this bcc-fcc transition proceeds in two steps, i.e., bcc-hcp and hcp-fcc. A crystallographic model is proposed to explain the two-step transition through shearing and sliding, which are mediated by irradiation-induced defects and strain in the films. In addition, the existence of the hcp and fcc metastable states in the Nb-Co system was confirmed by high-temperature solid state interdiffusion of the corresponding multilayers.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 2 , February 1994 , pp. 357 - 361
Copyright
Copyright © Materials Research Society 1994

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