Sintering behavior and mechanical properties of WC-Al2O3 composites prepared by spark plasma sintering (SPS)

被引：29

作者：

Chen, Wei-Hsio ^{[1
]}

Lin, Hao-Tung ^{[2
]}

Nayak, Pramoda K. ^{[1
,3
]}

Chang, Man-Ping ^{[1
]}

Huang, Jow-Lay ^{[1
,4
,5
]}

机构：

[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 701, Taiwan

[2] Kun Shan Univ, Dept Mat Engn, Tainan 710, Taiwan

[3] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 30013, Taiwan

[4] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 701, Taiwan

[5] Natl Univ Kaohsiung, Dept Chem & Mat Engn, Kaohsiung 811, Taiwan

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2015年 / 48卷

关键词：

Nanocomposite; Spark plasma sintering; Hardness; Microstructure; AL2O3/SIC NANOCOMPOSITES; MICROSTRUCTURE; ALUMINA; STRENGTH;

D O I：

10.1016/j.ijrmhm.2014.10.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The sintering behavior of WC-Al2O3 composites prepared via spark plasma sintering (SPS) was investigated. The initial WC-Al2O3 nanocomposite powders were prepared via metal organic chemical vapor deposition in a spouted bed followed by carburization process. Then the nanocomposite powders were densified via SPS at 1400 degrees C. The mechanical properties of sintered disks such as hardness and toughness were analyzed. The WC -Al2O3 composites show maximum toughness of 6.1 MPa.m(1/2) and hardness value of 24 GPa, which are higher than those of monolithic alumina. Microstructure observations indicate that WC nanoparticles are dispersed within the alumina matrix which limit the grain growth of alumina matrix. The fracture mode changes from intergranular in the case of monolithic Al2O3 to transgranular mode for nanocomposites to reinforce their mechanical properties. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：414 / 417

页数：4

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