Atomic arrangement and the formation of partially coherent interfaces in the Ti-V-N system

J. K. Chen; G. R. Purdy; G. C. Weatherly; A. Kroupa

doi:10.1007/s11661-998-0031-3

Atomic arrangement and the formation of partially coherent interfaces in the Ti-V-N system

J. K. Chen
, G. R. Purdy
, G. C. Weatherly
, A. Kroupa

材料及資源工程系

研究成果: 期刊貢獻 › 文章 › 同行評審

16 引文斯高帕斯（Scopus）

摘要

The precipitation of (V,Ti) (bcc structure) in a (Ti,V)N (NaCl structure) matrix is considered in the current study. The lattice parameter ratio of this system, a_f/a_b = 1.34, is quite different from most previous studies (a_f/a_b ∼ 1.26) and provides an opportunity to test recent models proposed for the formation of precipitate morphology and the interface structure. Like many other fcc:bcc precipitation systems, the Ti-V-N system involves an invariant line transformation strain. In this system, the invariant line is associated with a high-index orientation relationship (OR). The observed OR is in good agreement with a predicted relationship based upon a geometric matching criterion proposed by Ryan et a/.1'1 The Burgers vectors for the interfacial defects were determined directly by making high-resolution transmission electron microscope (HRTEM) observations along three different directions. The observations confirm that the formation of the precipitate facets, the spacings of misfit dislocations, and the direction of interfacial defects all agree with atom-matching considerations.

原文	English
頁（從 - 到）	2049-2058
頁數	10
期刊	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
卷	29
發行號	8
DOIs	https://doi.org/10.1007/s11661-998-0031-3
出版狀態	Published - 1998

文獻附註

Funding Information:
The authors acknowledge the financial support of the Natural Sciences and Engineering Research Council of Canada and the Grant Agency of the Czech Republic under Project No. 106/94/0307. The help of Professor M. Kursa, Department of Nonferrous Metals, Technical University Ostrava, on ingot preparation, and Dr. J. Buchal, Institute of Materials Engineering, Technical University Brno, on X-ray diffraction measurements is gratefully acknowledged. The invitation of Dr. George Spanos to present this work is also appreciated.

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10.1007/s11661-998-0031-3

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abstract = "The precipitation of (V,Ti) (bcc structure) in a (Ti,V)N (NaCl structure) matrix is considered in the current study. The lattice parameter ratio of this system, af/ab = 1.34, is quite different from most previous studies (af/ab ∼ 1.26) and provides an opportunity to test recent models proposed for the formation of precipitate morphology and the interface structure. Like many other fcc:bcc precipitation systems, the Ti-V-N system involves an invariant line transformation strain. In this system, the invariant line is associated with a high-index orientation relationship (OR). The observed OR is in good agreement with a predicted relationship based upon a geometric matching criterion proposed by Ryan et a/.1'1 The Burgers vectors for the interfacial defects were determined directly by making high-resolution transmission electron microscope (HRTEM) observations along three different directions. The observations confirm that the formation of the precipitate facets, the spacings of misfit dislocations, and the direction of interfacial defects all agree with atom-matching considerations.",

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Atomic arrangement and the formation of partially coherent interfaces in the Ti-V-N system

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