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Author Ma, Z. ♦ Allen, L. H. ♦ Allman, D. D. J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ TITANIUM SILICIDES ♦ PHASE TRANSFORMATIONS ♦ MICROSTRUCTURE ♦ NUCLEATION ♦ GRAIN BOUNDARIES ♦ INTERFACES ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ ELECTRON DIFFRACTION ♦ POLYCRYSTALS
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.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-05-01
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 77
Issue Number 9


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