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Mechanical and thermal properties of single crystals of ZrB2

Published online by Cambridge University Press:  11 February 2011

N. L. Oka moto ,
M. Kusakari ,
K. Tanaka ,
H. Inui ,
M. Yamaguchi  and
S. Otani
N. L. Oka moto
Affiliation:
Department of Materials Science and Engineering, Kyoto University Sakyo-ku, Kyoto 606–8501, Japan
M. Kusakari
Affiliation:
Department of Materials Science and Engineering, Kyoto University Sakyo-ku, Kyoto 606–8501, Japan
K. Tanaka
Affiliation:
Department of Materials Science and Engineering, Kyoto University Sakyo-ku, Kyoto 606–8501, Japan
H. Inui
Affiliation:
Department of Materials Science and Engineering, Kyoto University Sakyo-ku, Kyoto 606–8501, Japan
M. Yamaguchi
Affiliation:
Department of Materials Science and Engineering, Kyoto University Sakyo-ku, Kyoto 606–8501, Japan
S. Otani
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, 1–1, Namiki, Tsukuba, Ibaraki 305–0044, Japan
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Abstract

Coefficients of thermal expansion (CTE), elastic constants and plastic deformation behaviors of single crystals of ZrB2, which possesses a hexagonal layered structure where pure Zr and pure B atomic planes stack alternatively along the c-axis, have been investigated in wide temperature ranges. While the observed elastic constants indicate highly anisotropic nature of atomic bonding being consistent with the layered structure, the observed CTE values are rather isotropic. Two operative slip systems, (0001)<1120> and on {1100}<1123>, are identified in compression tests. The observed plastic behaviors are discussed in the light of the deduced anisotropy in atomic bonding.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 753: Symposium BB – Defect Properties and Related Phenomena in Intermetallic Alloys , 2002 , BB2.9
Copyright
Copyright © Materials Research Society 2003

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References

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