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Effects of Si3N4 and WC on the oxidation resistance of ZrB2/SiC ceramic tool materials.

Authors :
Zhang, Jingbao
Chen, Hui
Xiao, Guangchun
Yi, Mingdong
Chen, Zhaoqiang
Zhang, Jingjie
Shang, Xizuo
Xu, Chonghai
Source :
Ceramics International. Mar2022, Vol. 48 Issue 6, p8097-8103. 7p.
Publication Year :
2022

Abstract

ZrB 2 /SiC, ZrB 2 /SiC/Si 3 N 4 and ZrB 2 /SiC/WC ceramic tool materials were prepared by spark plasma sintering technology, and their oxidation resistance was tested at different oxidation temperatures. When the oxidation temperature is 1300 °C, the oxide layer thickness, oxidation weight gain and flexural strength of ZrB 2 /SiC/Si 3 N 4 ceramic tool material after oxidation are 8.476 μm, 1.436 mg cm−2 and 891.0 MPa, respectively. Compared with ZrB 2 /SiC ceramic tool materials, the oxide layer thickness and oxidation weight gain are reduced by 8.2% and 11.8%, respectively, and the flexural strength after oxidation is increased by 116.1%. However, the addition of WC significantly reduces the oxidation resistance of the ceramic tool material. A dense oxide film is formed on the surface of ZrB 2 /SiC/Si 3 N 4 ceramic tool material during oxidation, which effectively prevents oxygen from entering the inside of the material, thereby improving the oxidation resistance of the ceramic tool material. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02728842
Volume :
48
Issue :
6
Database :
Academic Search Index
Journal :
Ceramics International
Publication Type :
Academic Journal
Accession number :
155311523
Full Text :
https://doi.org/10.1016/j.ceramint.2021.12.011