Toughening mechanisms and microstructure of Al2O3-TiC-Co composites

被引：10

作者：

Shi, Rui-xia ^{[1
]}

Li, Jia ^{[1
]}

Yin, Yan-sheng ^{[2
]}

Ge, He-yi ^{[1
]}

机构：

[1] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China

[2] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 16-17期

关键词：

Toughening mechanism; Microstructure; Al2O3-TiC-Co; Cobalt-coated; MECHANOCHEMICAL REDUCTION; NANOCOMPOSITE; ALUMINA; CARBIDE;

D O I：

10.1016/j.msea.2011.03.054

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cobalt-coated Al2O3-TiC composites were prepared by hot-pressing at 1650 degrees C. Higher fracture toughness (7.81 MPa m(1/2)) and bending strength (782 MPa) were obtained for composites containing both intragranular and intergranular TiC grains. TiC grains were dispersed homogeneously with an incoherent interface in the Al2O3 matrix and most cobalt particles resided at triple grain junctions. Grain/subgrain refinement, dislocation activities, and dispersion strengthening mainly account for the toughening mechanisms. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：5341 / 5347

页数：7

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