Phase transformation in nanometer-sized gamma-alumina by mechanical milling

    Authors

    Y. G. Wang; C. Suryanarayana;L. A. An

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    NANOCRYSTALLINE ALUMINA; TRANSITION; ZIRCONIA; BOEHMITE; KINETICS; POWDERS; BODIES; SYSTEM; AL2O3; Materials Science, Ceramics

    Abstract

    Nanocrystalline gamma-alumina powders of 50-nm size were milled by high-energy hall milling. It was found that the pure gamma-alumina phase showed great stability and did not transform to any other phase even after a long milling time. On the other hand, gamma-alumina, which contained a small amount of the alpha-alumina phase, showed a gradual phase transformation from gamma- to alpha-alumina on milling. The phase transformation mechanism during milling appears to be nucleation and growth type and promoted by the alpha-alumina seed.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    88

    Issue/Number

    3

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    780

    Last Page

    783

    WOS Identifier

    WOS:000227857100044

    ISSN

    0002-7820

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