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Structural Stability of Heat Treated W/B4C Multilayers

Published online by Cambridge University Press:  28 February 2011

A.F. Jankowski
A.F. Jankowski*
Affiliation:
Lawrence Livermore National Laboratory, Chemistry & Materials Science, P.O. Box 808, Livermore, California 94550
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Abstract

The utilization of W/B4C multilayer structures as Bragg diffractors rests in their reflective efficiency and dependability, both of which rely on the stability of the layered structure. The layers within the vapor deposited multilayers, often amorphous, are typically metastable, hence susceptible to thermally induced structural change. In fact, crystallization and compound formation are known to occur in annealed multilayer systems. In this study, multilayers of W/C and W/B4C were vacuum heat treated, then structurally examined. A comparison between the pre- and post- heat treated structures of the two multilayer systems, accomplished using diffraction and electron microscopy, indicate structural stability in the W/B4C multilayers as opposed to structural degradation noted for the W/C system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 160 , 1989 , 611
Copyright
Copyright © Materials Research Society 1990

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