Microstructure and properties of in situ nanometric Al2O3 reinforced α-Fe(Al)-Fe3Al-based composites

被引：14
|
作者：
Li, Jia [1 ]
Kwong, Fung-luen [2 ]
Shi, Riu-xia [1 ]
Ng, Dickon H. L. [2 ]
Yin, Yan-sheng [3 ]
机构：
[1] Univ Jinan, Dept Mat Sci & Engn, Jinan, Peoples R China
[2] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[3] China Ocean Univ, Sch Mat Sci & Engn, Qingdao, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 526卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Iron aluminides composite; Particulate-reinforced; Microstructure; Mechanical testing; IRON;
D O I：
10.1016/j.msea.2009.07.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The alpha phase Fe(Al)-Fe3Al-based composites reinforced with 4-9 vol.% alpha-Al2O3 dispersions were fabricated by hot-pressing sintering. Nanometer-sized alpha-Al2O3 dispersed homogeneously in the submicron alpha-Fe(Al) and Fe3Al matrix, with a 20% lattice-mismatch presented between alpha-Al2O3 and alpha-Fe(Al). Higher fracture toughness (39 MPa M-1/2) and bending strength (1260 MPa) were obtained for composites containing both intragranular and intergranular Al2O3 grains. The combination of fine grain strengthening with dispersion strengthening can account for the improvement of mechanical properties. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：50 / 55
页数：6
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