Al2O3-Based Ceramic Composites with a High Brittle Fracture Resistance

被引：7
|
作者：
Podzorova, L. I. [1 ]
Il'icheva, A. A. [1 ]
Pen'kova, O. I. [1 ]
Antonova, O. S. [1 ]
Baikin, A. S. [1 ]
Konovalov, A. A. [1 ]
机构：
[1] Russian Acad Sci, Baikov Inst Met & Mat Sci, Leninskii Pr 49, Moscow 119334, Russia
来源：
INORGANIC MATERIALS | 2019年 / 55卷 / 06期
关键词：
aluminum oxide; zirconium dioxide; phase composition; fracture toughness; bending strength; ALUMINA MATRIX COMPOSITES; PHASE; MICROSTRUCTURE;
D O I：
10.1134/S0020168519060128
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We examine synthesis conditions of precursors to ZrO2-Al2O3-CeO2 powders modified with calcium cations. The precipitation procedure and the aging of reaction systems of precursors to the synthesized composites are shown to influence the morphology and particle size of the nanopowders and the evolution of the phase composition, microstructure, and mechanical characteristics of composites prepared from them. The composites offer a high brittle fracture resistance due to the combined effect of transformation and dispersion hardening owing to the presence of T-ZrO2-based solid solutions and calcium hexaaluminates (bending strength, up to 1000 MPa; fracture toughness K-Ic, up to 10.5 MPa m(1/2)).
引用
收藏
页码：628 / 633
页数：6
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