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The Nature of Bonds in New Ternary Zirconium Silicide Intermetallic Compound of 16H Crystal Structure

Published online by Cambridge University Press:  22 February 2011

Yukinori Ikarashi ,
K. Ishizaki ,
P. Bolsaitis  and
H. Ohnishi
Yukinori Ikarashi
Affiliation:
Tsuruoka Kogyo Koto Sen-mon Gakko (Tsuruoka Nat. Coll. of Tech.)Ino-oka 104 Sawada Tsuruoka, Yamagata 997, Japan
K. Ishizaki
Affiliation:
Nagaoka Gijyutsu-Kagaku Daigaku (Nagaoka Univ. of Tech.) Kamitomioka 1603-1 Nagaoka, Niigata 940-21, Japan
P. Bolsaitis
Affiliation:
Massachusetts Institute of Technology Cambridge, Massachusetts 02139
H. Ohnishi
Affiliation:
ALPS Electric Co., Ltd. Magnetic Devices Division Higashitakami 1-3-5 Nagaoka, Niigata 940, Japan
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Abstract

The zirconium silicide intermetallic compounds of 16H crystal structure are good materials for high temperature structural applications because of their high melting point and low density. Their shortcoming is low ductility. To increase ductility, new ternary zirconium silicide intermetallic compound of 16H crystal structure, Si3Y3Zr2, has been designed by substituting yttrium atoms into zirconium 6g point set sites.

Near-neighbor diagrams are used to examine the bonds in Si3Y3Zr2, whose bonds are more symmetric than other 16H binary intermetallic compounds.

Melting points of intermetallic compounds of 16H crystal structure depend upon the strain parameters of N4d-N4d(2-2) bonds. The melting point of Si3Y3Zr2 is estimated to be higher than that of Si3Zr5 (2500 K). It is predicted that Si3Y3Zr2 is a good material for high temperature structural applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1059
Copyright
Copyright © Materials Research Society 1995

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