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Microtexture of shock reaction products of niobium and silica mixtures

Published online by Cambridge University Press:  31 January 2011

Reiko Murao ,
Masae Kikuchi ,
Kiyoto Fukuoka ,
Eiji Aoyagi ,
Toshiyuki Atou  and
Yasuhiko Syono
Reiko Murao
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
Masae Kikuchi
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
Kiyoto Fukuoka
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
Eiji Aoyagi
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
Toshiyuki Atou
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
Yasuhiko Syono
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
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Abstract

Shock compression experiments on powder mixtures of niobium metal and quartz were conducted for the pressure range of 30–40 GPa by a 25-mm single-stage propellant gun. Chemical reaction occurred above 35 GPa, and products were found to be mainly so-called “Cu3Au-type” Nb3Si, which contained a small amount of oxygen. Microtextures of the specimen were examined by scanning and transmission electron microscopy. A field-emission transmission electron microscope was used for energy-dispersive x-ray analysis of microtextures in small particles found in the SiO2 matrix, and various species with different Nb/Si ratio and oxygen content were shown to be produced through the nonequilibrium process of shock compression.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 7 , July 1999 , pp. 3169 - 3174
Copyright
Copyright © Materials Research Society 1999

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References

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