Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1656416 | Surface and Coatings Technology | 2016 | 7 Pages |
Abstract
To relieve the mismatch of thermal expansion coefficient and enhance the service reliability of SiC coating efficiently, blasting treatment of C/C composites conducted by oxyacetylene torch, as a surface modification method, was used. SiC coating was prepared on the treated C/C composites by pack cementation, and an inlaid interface with different structures between SiC coating and C/C substrate was achieved. High temperature test was conducted under oxyacetylene torch, and the oxyacetylene flame was parallel to the as-received SiC coated C/C composites. After 5 thermal cycles from 1750 °C to room temperature, a glassy SiO2 protective layer without macro-crack was formed on the surface of the coated C/C composites with pre-blasting treatment in the heat flux of 3.2 MW/m2. The good thermal cycle performance was attributed to the inlaid interface, which could relieve the thermal stress, improve the bonding strength and alleviate the mismatch of thermal expansion coefficient between C/C substrate and SiC coating efficiently.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Jia-Ping Zhang, Qian-Gang Fu, Jun-Ling Qu, Lei Zhuang, Pei-Pei Wang, He-Jun Li,