Crystallization of calcium hexaluminate on basal alumina

Michael P. Mallamaci; Kevin B. Sartain; C. Barry Carter

doi:10.1080/01418619808224069

Crystallization of calcium hexaluminate on basal alumina

Michael P. Mallamaci
, Kevin B. Sartain
, C. Barry Carter

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

The epitactic growth of calcium hexaluminate (CA6) on the basal plane of alumina was observed during an investigation of the interaction between silicate glass films deposited on single-crystal alumina (α-Al2O3). Two distinctly different orientation relationships occurred. The first can be described as perfect hexagon-on-hexagon epitaxy with (1120)CA6∥(1010)Al2O3 and (0001)Al2O3∥(0001)CA6. This relationship has 1.1% lattice misfit in the substrate plane; the misfit is accommodated at the interface by a hexagonal network of misfit dislocations. In the second relationship the CA6 grains are rotated about the substrate normal and can be explained by the coincident-site lattice model for phase boundaries. Both orientation relationships emphasize the influence of substrate crystallography on the crystallization process. © 1998 Taylor and Francis Group, LLC.

Original language	English
Pages (from-to)	561-575
Number of pages	15
Journal	Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume	77
Issue number	3
DOIs	https://doi.org/10.1080/01418619808224069
State	Published - Jan 1 1998
Externally published	Yes

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title = "Crystallization of calcium hexaluminate on basal alumina",

abstract = "The epitactic growth of calcium hexaluminate (CA6) on the basal plane of alumina was observed during an investigation of the interaction between silicate glass films deposited on single-crystal alumina (α-Al2O3). Two distinctly different orientation relationships occurred. The first can be described as perfect hexagon-on-hexagon epitaxy with (1120)CA6∥(1010)Al2O3 and (0001)Al2O3∥(0001)CA6. This relationship has 1.1\% lattice misfit in the substrate plane; the misfit is accommodated at the interface by a hexagonal network of misfit dislocations. In the second relationship the CA6 grains are rotated about the substrate normal and can be explained by the coincident-site lattice model for phase boundaries. Both orientation relationships emphasize the influence of substrate crystallography on the crystallization process. {\textcopyright} 1998 Taylor and Francis Group, LLC.",

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year = "1998",

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TY - JOUR

T1 - Crystallization of calcium hexaluminate on basal alumina

AU - Mallamaci, Michael P.

AU - Sartain, Kevin B.

AU - Carter, C. Barry

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The epitactic growth of calcium hexaluminate (CA6) on the basal plane of alumina was observed during an investigation of the interaction between silicate glass films deposited on single-crystal alumina (α-Al2O3). Two distinctly different orientation relationships occurred. The first can be described as perfect hexagon-on-hexagon epitaxy with (1120)CA6∥(1010)Al2O3 and (0001)Al2O3∥(0001)CA6. This relationship has 1.1% lattice misfit in the substrate plane; the misfit is accommodated at the interface by a hexagonal network of misfit dislocations. In the second relationship the CA6 grains are rotated about the substrate normal and can be explained by the coincident-site lattice model for phase boundaries. Both orientation relationships emphasize the influence of substrate crystallography on the crystallization process. © 1998 Taylor and Francis Group, LLC.

AB - The epitactic growth of calcium hexaluminate (CA6) on the basal plane of alumina was observed during an investigation of the interaction between silicate glass films deposited on single-crystal alumina (α-Al2O3). Two distinctly different orientation relationships occurred. The first can be described as perfect hexagon-on-hexagon epitaxy with (1120)CA6∥(1010)Al2O3 and (0001)Al2O3∥(0001)CA6. This relationship has 1.1% lattice misfit in the substrate plane; the misfit is accommodated at the interface by a hexagonal network of misfit dislocations. In the second relationship the CA6 grains are rotated about the substrate normal and can be explained by the coincident-site lattice model for phase boundaries. Both orientation relationships emphasize the influence of substrate crystallography on the crystallization process. © 1998 Taylor and Francis Group, LLC.

UR - https://www.scopus.com/pages/publications/0032034034

U2 - 10.1080/01418619808224069

DO - 10.1080/01418619808224069

M3 - Article

SN - 0141-8610

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EP - 575

JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties

JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties

IS - 3

ER -

Crystallization of calcium hexaluminate on basal alumina

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