Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 32, Issue 10, Pages 996-1002Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2016.06.019
Keywords
Ceramic coating; C/C composites; Ablation performance
Funding
- National Natural Science Foundation of China [51521061, 51502245, 51472203]
- 111 Project [B08040]
- Research Fund of State Key Laboratory of Solidification Processing (NWPU), China [142-TZ-2016]
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Ablation resistance of monolithic LaB6-doped ZrC coating for SiC-coated carbon/carbon composites by supersonic atmospheric plasma spray was investigated under an oxyacetylene torch with a heat flux of 4.18 MW/m(2). Result shows that ZrC coating with 10 vol.% LaB6 has a good ablation resistance compared with pure ZrC, ZrC with 20 vol.% LaB6 and SiC-doped ZrC coating. After ablation for 15 s, the weight is increased by 1.12 mg/s. The good ablation resistance is ascribed to the formation of a stabilized scale which consists of protective La2Zr2O7-containing molten phase and ZrO2 particles keeping the integrity of the coating. Copyright (C) 2016, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
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