Effect of heat generation on the development of vermicular α-Al2O3 in alumina films

R. B. Bagwell; G. L. Messing

Effect of heat generation on the development of vermicular α-Al₂O₃ in alumina films

R. B. Bagwell, G. L. Messing

Research output: Contribution to journal › Conference article › peer-review

Abstract

The transformation of transition aluminas (i.e. θ-Al₂O₃) to α-Al₂O₃ results in an interconnected, porous microstructure that is commonly described as 'wormy' or 'vermicular'. The effect of heat generated during the exothermic transformation at the θ-Al₂O₃/α-Al₂O₃ interface on the development of the vermicular α-Al₂O₃ morphology was analyzed in boehmite-derived thin films. The vermicular structure may arise in an analogous manner to the thermal dendrites formed in metals during solidification. However, the analysis shows that heat generation and transfer at the interface does not play a significant role in the development of α-Al₂O₃ dendrites.

Original language	English (US)
Pages (from-to)	133-137
Number of pages	5
Journal	Materials Research Society Symposium - Proceedings
Volume	432
State	Published - 1997
Event	Proceedings of the 1996 MRS Spring Meeting - San Francisco, CA, USA Duration: Apr 8 1996 → Apr 12 1996

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effect of heat generation on the development of vermicular α-Al2O3 in alumina films",

abstract = "The transformation of transition aluminas (i.e. θ-Al2O3) to α-Al2O3 results in an interconnected, porous microstructure that is commonly described as 'wormy' or 'vermicular'. The effect of heat generated during the exothermic transformation at the θ-Al2O3/α-Al2O3 interface on the development of the vermicular α-Al2O3 morphology was analyzed in boehmite-derived thin films. The vermicular structure may arise in an analogous manner to the thermal dendrites formed in metals during solidification. However, the analysis shows that heat generation and transfer at the interface does not play a significant role in the development of α-Al2O3 dendrites.",

author = "Bagwell, {R. B.} and Messing, {G. L.}",

year = "1997",

language = "English (US)",

volume = "432",

pages = "133--137",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

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TY - JOUR

T1 - Effect of heat generation on the development of vermicular α-Al2O3 in alumina films

AU - Bagwell, R. B.

AU - Messing, G. L.

PY - 1997

Y1 - 1997

N2 - The transformation of transition aluminas (i.e. θ-Al2O3) to α-Al2O3 results in an interconnected, porous microstructure that is commonly described as 'wormy' or 'vermicular'. The effect of heat generated during the exothermic transformation at the θ-Al2O3/α-Al2O3 interface on the development of the vermicular α-Al2O3 morphology was analyzed in boehmite-derived thin films. The vermicular structure may arise in an analogous manner to the thermal dendrites formed in metals during solidification. However, the analysis shows that heat generation and transfer at the interface does not play a significant role in the development of α-Al2O3 dendrites.

AB - The transformation of transition aluminas (i.e. θ-Al2O3) to α-Al2O3 results in an interconnected, porous microstructure that is commonly described as 'wormy' or 'vermicular'. The effect of heat generated during the exothermic transformation at the θ-Al2O3/α-Al2O3 interface on the development of the vermicular α-Al2O3 morphology was analyzed in boehmite-derived thin films. The vermicular structure may arise in an analogous manner to the thermal dendrites formed in metals during solidification. However, the analysis shows that heat generation and transfer at the interface does not play a significant role in the development of α-Al2O3 dendrites.

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UR - http://www.scopus.com/inward/citedby.url?scp=0030672893&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0030672893

SN - 0272-9172

VL - 432

SP - 133

EP - 137

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1996 MRS Spring Meeting

Y2 - 8 April 1996 through 12 April 1996

ER -

Effect of heat generation on the development of vermicular α-Al₂O₃ in alumina films

Abstract

All Science Journal Classification (ASJC) codes

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