Techniques of SrAl₁₂O₁₉ Platelets Formation in ZTA

Abstract:

A possibility of the SrAl₁₂O₁₉ platelet formation in the Al₂O₃ – ZrO₂ ceramic using SrCO₃ or Sr₃Al₂O₆ is evaluated. An impact of two techniques of platelet synthesis on mechanical properties of the material is investigated. Defects revealed in the sintered ceramic material are analyzed. Recommendations on the best method of the SrAl₁₂O₁₉ phase formation in ceramic materials are given based on the structural and X-ray diffraction analyses as well as on mechanical tests. It is shown that an addition of 3 wt% SrAl₁₂O₁₉ into the ZTA ceramic results in an increase in fracture toughness by up to 30 % in comparison with the initial material.

• Periodical: Applied Mechanics and Materials (Volume 788)
• Pages: 246-251
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.788.246
• Online since: August 2015
• Authors: Natalya Belousova*, Sergey Veselov, Nina Cherkasova, Aleksey Lazarev, Ruslan Kuzmin, Maksim Perepyolkin
• Keywords: Dense Ceramic, Fracture Toughness, Platelet, Sr₃Al₂O₆, SrAl₁₂O₁₉, Strontium Carbonate, Structural Ceramic, ZTA Ceramic

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