The Effects of Codoping Y₂O₃ on MgO Doped Spark Plasma Sintered Al₂O₃

Abstract:

Nanocrystalline alumina (Al2O3) powders were sintered by Spark Plasma Sintering (SPS) method in a vacuum atmosphere to obtain highly dense and fine grained final ceramic products. In the first section of experiments, 0.4 % wt MgO doped and 0.4 wt % Y2O3 doped Al2O3 were sintered at high temperatures and under high pressure with a SPS system. Later sintering procedures were carried out with codoping Y2O3 with the cathodic ratio of 0.4 wt % in order to investigate dopant effects on spark plasma sintered alumina. The microstructures of all samples were observed using scanning electron microscope and the properties such as density, hardness and fracture toughness were examined.

• Periodical: Advances in Science and Technology (Volume 63)
• Pages: 74-78
• DOI: https://doi.org/10.4028/www.scientific.net/AST.63.74
• Online since: October 2010
• Authors: Burcu Apak, G. Göller, Yücel Onüralp, Filiz Çinar Şahin
• Keywords: Alumina Ceramic, Doping, Spark Plasma Sintering (SPS)

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