Research on the Growth Mechanism of Alumina Ceramics with Columnar Grain

Abstract:

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Based on the structures and composition of ceramic materials, the microstructure design and new preparations were used to induce in situ grain growth by adjusting the main factors which had impacts on grain morphology. By adding CAS (CaO-Al2O3-SiO2) and Nb2O5, the complex toughened alumina ceramics with columnar grain was fabricated under pressureless sintering systematically. The influences of additives on the alumina ceramics with columnar grain were analyzed by means of TEM, SEM, XRD etc. The dynamic conditions of anisotropic growth of columnar grain were researched, and superior growth in some grain directions was induced by doping CAS and Nb2O5. The growth mechanism of columnar grains of alumina ceramics was explored, and established growth model.

Info:

Periodical:

Advanced Materials Research (Volumes 79-82)

Edited by:

Yansheng Yin and Xin Wang

Pages:

1899-1902

DOI:

10.4028/www.scientific.net/AMR.79-82.1899

Citation:

S. F. Rong et al., "Research on the Growth Mechanism of Alumina Ceramics with Columnar Grain ", Advanced Materials Research, Vols. 79-82, pp. 1899-1902, 2009

Online since:

August 2009

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Price:

$35.00

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