| DONG Zhi-jun,HUANG Rui,LUO An-an,LIU Shu-xian,YUAN Guan-ming,CONG Ye,LI Xuan-ke.Effect of Additives Used in a Pack Cementation Technique on the Structure and Properties of SiC-ZrC Coated Carbon/ Carbon Composites[J],43(6):22-27 |
| Effect of Additives Used in a Pack Cementation Technique on the Structure and Properties of SiC-ZrC Coated Carbon/ Carbon Composites |
| Received:July 12, 2014 Revised:December 10, 2014 |
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| DOI： |
| KeyWord:carbon / carbon composites SiC-ZrC coating additives used in a pack cementation technique anti-oxidation |
| Author | Institution |
| DONG Zhi-jun |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
| HUANG Rui |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
| LUO An-an |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
| LIU Shu-xian |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
| YUAN Guan-ming |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
| CONG Ye |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
| LI Xuan-ke |
The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials,Wuhan University of Science and Technology, Wuhan , China |
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| Abstract: |
| Objective To investigate the effect of different oxide additives on the phase composition, microstructure and oxidation resistance of the SiC-ZrC coated C/ C composites. Methods SiC-ZrC coated C/ C composites were prepared by a pack cementation technique with different oxides (Al2O3, B2O3 or MgO) as additives. The anti-oxidation property of the SiC-ZrC coated C/ C composites was also studied in the temperature range between 1000 ℃ and 1550 ℃ in static air. Results The results showed that Al2O3 and MgO additives exhibited better performance in enhancing the diffusion of the embedding powder materials than B2O3 additive. The SiC-ZrC coating prepared with Al2O3 as an additive was more compact than that prepared with MgO as an additive. The weight loss of the SiC-ZrC coated C/ C composites prepared with Al2O3 as an additive decreased gradually with the increasing oxidation temperature in the temperature range of 1000 ~ 1550 ℃ , and the weight loss was about 1% after oxidation at 1550 ℃ for 1 h in air. However, the weight loss of the SiC-ZrC coated C / C composites prepared with B2 O3 or MgO as an additive increased with the increase of the oxidation temperature. After oxidation for 1 h, the weight loss of the composites prepared with B2 O3 and MgO as additives reached 15% and 36% , respectively. Conclusion The SiC-ZrC coated C / C composites prepared with Al2 O3 as an additive had good oxidation resistance at high temperature. |
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