In situ transmission electron microscopy observations of twinning in lanthanum aluminate

An in situ TEM investigation of LaAlO3 crystals indicates that this material's phase transformation from rhombohedral to cubic upon heating is gradual; the crystal becomes isotropic at about 400-420 C. Many of the initial twins reappeared in the same morphology after the crystal's passing...

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Veröffentlicht in:	Scripta metallurgica et materialia 1995-02, Vol.32 (4), p.481-485
Hauptverfasser:	Norton, M.Grant, Biggers, Rand R.
Format:	Artikel
Sprache:	eng
Schlagworte:	ALUMINIUM COMPOUNDS ALUMINIUM OXIDES CHALCOGENIDES Condensed matter: structure, mechanical and thermal properties CRYSTAL-PHASE TRANSFORMATIONS Crystalline state (including molecular motions in solids) Crystallographic aspects of phase transformations pressure effects DATA ELECTRIC CONDUCTIVITY ELECTRICAL PROPERTIES ELECTRON MICROSCOPY Exact sciences and technology EXPERIMENTAL DATA INFORMATION LANTHANUM COMPOUNDS LANTHANUM OXIDES MATERIALS SCIENCE MICROSCOPY NUMERICAL DATA OXIDES OXYGEN COMPOUNDS PHASE TRANSFORMATIONS PHYSICAL PROPERTIES Physics RARE EARTH COMPOUNDS 360202 > Ceramics, Cermets, & Refractories-- Structure & Phase Studies SAMPLE PREPARATION Structure of solids and liquids crystallography SUBSTRATES SUPERCONDUCTIVITY TRANSMISSION ELECTRON MICROSCOPY TWINNING
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Zusammenfassung:	An in situ TEM investigation of LaAlO3 crystals indicates that this material's phase transformation from rhombohedral to cubic upon heating is gradual; the crystal becomes isotropic at about 400-420 C. Many of the initial twins reappeared in the same morphology after the crystal's passing through the phase transformation upon cooling. (AIAA)
ISSN:	0956-716X
DOI:	10.1016/0956-716X(95)90824-4