Grain refining in spark plasma sintering Al2O3 ceramics

    Authors

    J. L. Liu; Y. G. Wang; F. Q. Yang; K. P. Chen;L. N. An

    Comments

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    Abbreviated Journal Title

    J. Alloy. Compd.

    Keywords

    Spark plasma sintering; Nanostructure; Al2O3; Microstructure refining; DC ELECTRIC-FIELD; PLASTIC-DEFORMATION; OXIDE CERAMICS; FINAL-STAGE; DENSIFICATION; MECHANISM; ALUMINA; GROWTH; MICROSTRUCTURE; TECHNOLOGY; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &; Metallurgical Engineering

    Abstract

    The paper reports the effect of starting powder size and sintering temperature on the grain refining in spark plasma sintering Al2O3. It was found that the grain refining effect only occurred for the starting particles larger than a certain size. The grain size increased with increasing sintering temperature. The grain refining is likely caused by the rearrangement of dislocations through a thermo-mechanical fatigue process. It suggested that nanostructured alumina ceramics could be synthesized from micro-sized powders by optimizing the particle size and sintering temperature. Published by Elsevier B.V.

    Journal Title

    Journal of Alloys and Compounds

    Volume

    622

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    596

    Last Page

    600

    WOS Identifier

    WOS:000345749500089

    ISSN

    0925-8388

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