Influence of SiC whisker and AlPO <sub>4</sub> particle on the resistance for bi-layer mullite/SiC coating in burner rig tests
To enhance the oxidation resistance of Mullite coating at high-temperature and high-speed gas scour environment in burner rig tests, the bi-layer Mullite/SiC, (SiC<sub>w</sub>-Mullite)/SiC, (SiC<sub>w</sub>-AlPO<sub>4</sub>-Mullite)/SiC coating were prepared on the surface of C<sub>f</sub>/SiC composites. Results show that the weight loss of the bi-layer Mullite/SiC coating coated sample reached 38.49×10<sup>-3 </sup>g·cm<sup>-2</sup> after 16 times thermal cycles (240 min). After adding SiC whiskers to the Mullite outer coating, the weight loss of the bi-layer (SiC<sub>w</sub>-Mullite)/SiC coating coated samples decreased to 14.09×10<sup>-3 </sup>g·cm<sup>-2</sup> due to the toughening effect of SiC whiskers. After further adding AlPO<sub>4</sub> particles to the SiC<sub>w</sub>-Mullite outer coating, the weight loss of the bi-layer (SiC<sub>w</sub>-AlPO<sub>4</sub>-Mullite)/SiC coating coated samples was only 5.59×10<sup>-3 </sup>g·cm<sup>-2</sup>, much lower than the weight loss of the bi-layer (SiC<sub>w</sub>-Mullite)/SiC coating coated samples, showed that the AlPO<sub>4</sub> particles can further prevent the formation of cracks and reduce the weight loss of the coating sample owing to its adhesive performance in high-temperature environments.
Authors
- Peng Xiao (ORCID: https://orcid.org/0000-0003-2231-9824)
- Pengju Chen (ORCID: https://orcid.org/0000-0002-9195-6184)
- Li Yang (ORCID: https://orcid.org/0000-0003-4343-4370)
- Tian Tian (ORCID: https://orcid.org/0000-0002-4951-418X)
Publication Details
- Journal
- Materials and Solidification
- Published
- 2025-04-03
- DOI
- https://doi.org/10.26599/mas.2025.9580009
- Citations
- 1
- Primary Topic
- Advanced ceramic materials synthesis
- Type
- article
- Field-Weighted Citation Impact
- 0.73