Fracture behavior of directionally solidified CeO2- and Pr2O3-doped Y3Al5O12/Al2O3 eutectic composites

被引：32

作者：

Park, DY ^{[1
]}

Yang, JM ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 332卷 / 1-2期

关键词：

eutectic fiber; fracture toughness; directional solidification; CeO2-doped YAG alumina; Pr2O3-doped YAG/alumina;

D O I：

10.1016/S0921-5093(01)01748-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructural features and fracture behavior of CeO2- and Pr2O3-doped Y3Al5O12/Al2O3 eutectic composites grown by an edge-defined film-fed growth (EFG) technique were studied, The microstructures of the composites were examined using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Fracture toughness and crack propagation behavior of the composites were investigated using an indentation technique. The fracture toughness (K-IC) of CeO2- and Pr2O3-doped Y3Al5O12/Al2O3 eutectic composites were measured to be 4.99 MPa m(1/2) and 2.79 MPa m(1/2), respectively. Crack deflection was observed occasionally in both CeO2- and Pr2O3-doped Y3Al5O12/Al2O3 eutectic composites. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：276 / 284

页数：9

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