Effect of Particle Size and Titanium Content on the Fracture Toughness of Particle-Ceramic Composites

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• 作者：Rocha-Rangel Enrique^a ; ^{erochar@upv.edu.mx" class="auth_mail" title="E-mail the corresponding author} ; A. Rodrí ; guez-Garcí ; a José ; ^a ; Esparza-Vá ; zquez Sergio^a ; Cruz-Sá ; nchez Brianda^a ; Estrada-Guel Ivanovich^b ; Martí ; nez-Sá ; nchez Roberto^b
• 关键词：Al2O3 ; Particle size ; Ti particles ; Fracture toughness
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：2
• 页码：249-257
• 全文大小：844 K

文摘

Through an intense powder mixing produced in a planetary mill, they were manufactured Al₂O₃-ceramics strengthened with different amounts of Ti nano-particles. After milling, powders SEM observations show good dispersion of titanium in the mixture. From these observations it was estimated that the size of titanium particles is around 100 nm, whereas, Al₂O₃ presents 1-2 μm sizes. Then compacts made with mixed powder were pressureless at 1500 °C during 2 h. Resulting microstructures, show dense composites formed by an Al₂O₃-ceramic matrix with homogeneous immerse distribution of Ti nano-particles. Fracture toughness of the composites is directly dependent with the titanium content in the ceramic-matrix.