Compressive creep behavior of spark plasma sintered La₂O₃-YSZ composite

详细信息    查看全文

• 作者：K.D. Robles Arellano ; L. Bichler ; K. Mondal
• 关键词：A. Sintering ; B. Composite ; C. Creep ; D. ZrO2 ; La2O3
• 刊名：Ceramics International
• 出版年：April, 2014
• 年：2014
• 卷：40
• 期：3
• 页码：4231-4235
• 全文大小：813 K

文摘

The present paper describes compressive creep behavior of cubic 8 mol% yttria stabilized zirconia+10 mol% La₂O₃ (fabricated by Spark Plasma Sintering) in the temperature range of 1300-1330 掳C at a stress level of 45-78 MPa in vacuum. The pre- and post-creep microstructures, relative magnitudes of the stress exponent (n=1.7-2.1) and the activation energy (540-580 kJ/mol) suggest that grain boundary sliding aided by inter-diffusion of La and Zr leading to the formation of pyrochlore La_1.6Y_0.4Zr₂O₇ phase at the grain boundaries during creep is the active creep mechanism in this composite.