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Microstructure characterization of one-directionally oriented ulexite

Published online by Cambridge University Press:  31 January 2011

Yumi H. Ikuhara ,
Shinji Kondoh ,
Koichi Kikuta  and
Shin-ichi Hirano
Yumi H. Ikuhara
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 2-4-1 Mutsno, Atsuta-ku, Nagoya 456, Japan
Shinji Kondoh
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 2-4-1 Mutsno, Atsuta-ku, Nagoya 456, Japan
Koichi Kikuta
Affiliation:
National Industrial Research Institute of Nagoya, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Shin-ichi Hirano
Affiliation:
Department of Applied Chemistry, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464–01, Japan
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Abstract

Microstructures of ulexite were investigated by CTEM and low electron dose HREM. It was found that the longitudinal grains in ulexite were oriented to c-direction to form a bundle structure. There were a number of small-angle grain boundaries and stacking faults inside a grain in the ulexite. Cleavage microcracks and stacking faults were mostly introduced on the {010} of the ulexite. The high-angle grain boundaries mainly consisted of high coincidence boundaries, which was confirmed by a comparison of observed contact angles and calculated degree of coincidence at the boundaries. The light transmittance properties of the ulexite would depend on the defects such as stacking fault, small-angle grain boundary, and high-angle grain boundary.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 3 , March 1998 , pp. 778 - 783
Copyright
Copyright © Materials Research Society 1998

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References

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