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Effects of Si3N4 and WC on the oxidation resistance of ZrB2/SiC ceramic tool materials.
- 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]
- Subjects :
- *CERAMIC materials
*SILICON nitride
*OXIDATION
*OXIDE coating
*WEIGHT gain
Subjects
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