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Title: Microstructural aspects and mechanism of the {ital C}49-to-{ital C}54 polymorphic transformation in titanium disilicide

Abstract

Microstructural study of the {ital C}49--TiSi{sub 2} to {ital C}54--TiSi{sub 2} polymorphic transformation has been performed to elucidate microstructural evolution and possible mechanism of the phase transformation. It has been shown that the nucleation of the {ital C}54--TiSi{sub 2} is heterogeneous, and preferentially takes place at triple grain junctions or grain boundaries. The interphase interfaces between {ital C}49 and {ital C}54 disilicides are often ragged with incoherent characteristics. The growth of the {ital C}54 phase is found to proceed by advancing the highly mobile incoherent interfaces in all directions toward the heavily faulted {ital C}49 phase. No rigorous orientation relationships are found between the two phases. The microstructural features of the transformation bear some massive characteristics.

Authors:
;  [1];  [2]
  1. Department of Materials Science and Engineering and Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
  2. Microelectronic Products Division, AT&T Global Information Solutions, Colorado Springs, Colorado 80916 (United States)
Publication Date:
OSTI Identifier:
29263
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 77; Journal Issue: 9; Other Information: PBD: 1 May 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; TITANIUM SILICIDES; PHASE TRANSFORMATIONS; MICROSTRUCTURE; NUCLEATION; GRAIN BOUNDARIES; INTERFACES; TRANSMISSION ELECTRON MICROSCOPY; ELECTRON DIFFRACTION; POLYCRYSTALS

Citation Formats

Ma, Z, Allen, L H, and Allman, D D.J. Microstructural aspects and mechanism of the {ital C}49-to-{ital C}54 polymorphic transformation in titanium disilicide. United States: N. p., 1995. Web. doi:10.1063/1.359464.
Ma, Z, Allen, L H, & Allman, D D.J. Microstructural aspects and mechanism of the {ital C}49-to-{ital C}54 polymorphic transformation in titanium disilicide. United States. doi:10.1063/1.359464.
Ma, Z, Allen, L H, and Allman, D D.J. Mon . "Microstructural aspects and mechanism of the {ital C}49-to-{ital C}54 polymorphic transformation in titanium disilicide". United States. doi:10.1063/1.359464.
@article{osti_29263,
title = {Microstructural aspects and mechanism of the {ital C}49-to-{ital C}54 polymorphic transformation in titanium disilicide},
author = {Ma, Z and Allen, L H and Allman, D D.J.},
abstractNote = {Microstructural study of the {ital C}49--TiSi{sub 2} to {ital C}54--TiSi{sub 2} polymorphic transformation has been performed to elucidate microstructural evolution and possible mechanism of the phase transformation. It has been shown that the nucleation of the {ital C}54--TiSi{sub 2} is heterogeneous, and preferentially takes place at triple grain junctions or grain boundaries. The interphase interfaces between {ital C}49 and {ital C}54 disilicides are often ragged with incoherent characteristics. The growth of the {ital C}54 phase is found to proceed by advancing the highly mobile incoherent interfaces in all directions toward the heavily faulted {ital C}49 phase. No rigorous orientation relationships are found between the two phases. The microstructural features of the transformation bear some massive characteristics.},
doi = {10.1063/1.359464},
journal = {Journal of Applied Physics},
number = 9,
volume = 77,
place = {United States},
year = {1995},
month = {5}
}