[1]庄磊,付前刚*,李贺军,等. 聚合物浸渍裂解法制备C/C-ZrC-SiC复合材料的氧化行为及抗烧蚀性能研究[J].中国材料进展,2015,(6):001-5.[doi:10.7502/j.issn.1674-3962.2015.06.02]
 Zhuang Lei,Fu Qiangang*,Li Hejun,et al. Oxidation Behavior and Ablation resistance of C/C-ZrC-SiC Composites Prepared by Polymer Infiltration and Pyrolysis[J].MATERIALS CHINA,2015,(6):001-5.[doi:10.7502/j.issn.1674-3962.2015.06.02]
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 聚合物浸渍裂解法制备C/C-ZrC-SiC复合材料的氧化行为及抗烧蚀性能研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2015年第6期
页码:
001-5
栏目:
特约研究论文
出版日期:
2015-06-30

文章信息/Info

Title:
 Oxidation Behavior and Ablation resistance of C/C-ZrC-SiC Composites Prepared by Polymer Infiltration and Pyrolysis
作者:
庄磊付前刚*李贺军张佳平
西北工业大学 超高温复合材料重点实验室 /碳复合材料工程技术研究中心
Author(s):
Zhuang LeiFu Qiangang*Li HejunZhang Jiaping
C/C Composites Research Center, Northwestern Polytechnical University
关键词:
FONT-FAMILY: ’Calibri’’sans-serif’">C/C-ZrC-SiC 复合材料' target="_blank" rel="external"> FONT-FAMILY: 宋体">复合材料氧化热重
DOI:
10.7502/j.issn.1674-3962.2015.06.02
文献标志码:
A
摘要:
采用热梯度化学气相渗透和聚合物浸渍裂解法制备了 ZrC-SiC 改性 C/C 复合材料( C/C-ZrC-SiC ),借助 SEM XRD 等手段研究了该复合材料的微观形貌与相组成,并对其在 1500 ℃恒温静态空气环境、室温至 1400 ℃变温过程的氧化行为以及氧乙炔抗烧蚀性能进行了研究。结果表明:室温至 1400 ℃动态氧化时 C/C-ZrC-SiC 复合材料表现为增重→缓慢失重→剧烈失重→稳定四个过程;在 1500 静态氧化时,C/C-ZrC-SiC表现为增重→缓慢失重→动态稳定→剧烈失重→稳定五个过程。ZrCSiC优先氧化分别生成ZrO2骨架和SiO2玻璃层包裹基体和碳纤维,一定程度上减缓了基体和碳纤维的氧化。经过1200 s氧乙炔烧蚀,材料线烧蚀和质量烧蚀率分别为9.27×10-4 mm?s-16.67×10-4 g?s-1。在烧蚀过程中,试样表面能形成一个ZrO2外层/SiO2内层的双层结构保护膜。ZrO2骨架层能减缓烧蚀火焰对材料内部的热力学和热化学烧蚀,而致密的SiO2层能够弥合材料的裂纹、孔洞等缺陷,阻挡有氧气氛进一步进入材料内部,使材料表现出优异的抗烧蚀性能。
Abstract:
C/C-ZrC-SiC-ZrB2 composites were prepared by thermal gradient chemical vapor infiltration (TCVI) and precursor infiltration and pyrolysis (PIP) process. The microstructures and phase compositions of C/C-ZrC-SiC composites after oxidation were analyzed by scanning electron microscopy and X-ray diffraction, respectively. Isothermal oxidation behavior at 1500 , dynamic oxidation behavior from room temperature to 1400 and long-term ablation resistance of the composites were investigated. The results show that dynamic oxidation behavior from room temperature to 1400 could be divided into four stages: mass gain, slow mass loss, severe mass loss and constant. While the isothermal oxidation behavior of C/C-ZrC-SiC at 1500 could be divided into five stages: mass gain, slow mass loss, constant, severe mass loss and constant. ZrC and SiC trend to be oxidized preferentially and generate ZrO2 and SiO2, which wrap and protect C/C matrix and fibers partly. After ablated for 1200 s by oxyacetylene flame, the linear and mass ablation rates of composites were 9.27×10-4 mm?s-1 and 6.67×10-4 g?s-1, respectively. ZrO2 and SiO2 were formed by the oxidation of ZrC and SiC, respectively. ZrO2 can alleviate the thermal-physical and thermal-chemical erosion caused by the oxyacetylene torch, and dense SiO2 glassy film can seal the defects such as cracks and holes, leading to a good ablation resistance of C/C-ZrC-SiC composites.
更新日期/Last Update: 2015-05-29