Low-Temperature Spark Plasma Sintering of Pure Nano WC Powder

被引：42

作者：

Grasso, Salvatore ^{[1
,2
]}

Poetschke, Johannes ^{[3
]}

Richter, Volkmar ^{[3
]}

Maizza, Giovanni ^{[4
]}

Sakka, Yoshio ^{[5
]}

Reece, Michael J. ^{[1
,2
]}

机构：

[1] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England

[2] Queen Mary Univ London, Nanoforce Technol Ltd, London E1 4NS, England

[3] Fraunhofer Inst Ceram Technol & Syst, D-01277 Dresden, Germany

[4] Politecn Torino, Dipartimento Sci Mat & Ingn Chim, I-10129 Turin, Italy

[5] Natl Inst Mat Sci, Adv Mat Proc Unit, Tsukuba, Ibaraki 3050047, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2013年 / 96卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

TUNGSTEN CARBIDE; TOUGHNESS; FRACTURE; ALUMINA; VC;

D O I：

10.1111/jace.12365

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For the first time we have demonstrated the densification of high-purity nanostructured (davg approximate to 60 nm) tungsten carbide by High Pressure Spark Plasma Sintering (HPSPS) in the unusually low temperature range of 1200 degrees C-1400 degrees C. The high-pressure sintering (i.e., 300MPa) produced dense material at a temperature as low as 1400 degrees C. In comparison with more conventional sintering techniques, such as SPS (80MPa) or hot isostatic pressing, HPSPS lowered the temperature required for full densification by 400 degrees C-500 degrees C. High Pressure Spark Plasma Sintering, even in absence of any sintering aid or grain growth inhibitor, retained a very fine microstructure resulting in a significant improvement in both hardness (2721 HV10) and fracture toughness (7.2MPam1/2).

引用

页码：1702 / 1705

页数：4

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