Aluminium Titanate-Aluminia Composites Synthesized by Heterogeneous Precipitation Method

Abstract:

Aluminium titanate-alumina (AT-A) composites were sintered from the precursor powders prepared by two different methods: a simple sol-gel based heterogeneous precipitation method and a traditional blending method. The crystalline phase, microstructure, mechanical strength, sintering properties, and thermal expansion coefficient (TEC) of the sintered AT-A composites were investigated and compared. The heterogeneous precipitation method increases the homogeneity of the precursor powders and improves the mechanical and sintering properties of the AT-A composites. The AT-A composites with a Al:Ti ratio of 2.2 achieve the optimal performance where the bending strength is high and the TEC remains low.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 3-7
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.3
• Online since: November 2012
• Authors: Chun Xia Feng, Jing Hua Chen, Wei Guo, Bao Xiang Jiao, Hong Bin Lu
• Keywords: Aluminium Titanate-Aluminia (AT-A) Composites, Bending Strength, Heterogeneous Precipitation, Sintering

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