[1]孟祥利,崔 红,闫联生,等.基体改性C/C-HfC-HfB2-SiC复合材料抗烧蚀性能研究[J].中国材料进展,2013,(11):001-10.[doi:10.7502/j.issn.1674-3962.2013.11.03]
 MENG Xiangli,CUI Hong,YAN Liansheng,et al.Ablation behaviors of matrix modified C/C-HfC-HfB2-SiC composites[J].MATERIALS CHINA,2013,(11):001-10.[doi:10.7502/j.issn.1674-3962.2013.11.03]
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基体改性C/C-HfC-HfB2-SiC复合材料抗烧蚀性能研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2013年第11期
页码:
001-10
栏目:
特约研究论文
出版日期:
2013-11-30

文章信息/Info

Title:
Ablation behaviors of matrix modified C/C-HfC-HfB2-SiC composites
作者:
孟祥利12崔 红2闫联生2张 强2宋麦丽2朱阳 2
(1.西北工业大学材料学院 西安710072;)(2.西安航天复合材料研究所 西安710025)
Author(s):
MENG Xiangli12 CUI Hong2 YAN Liansheng2 ZHANG Qiang2 SONG Maili2 Zhu Yang2
(1.School of materials Science and Engineering, Northwestern Polytechnical University, Xin 710072, China)(2 Xi’an Aerospace Composites Research Institute, Xin 710025, China.)
关键词:
C/C-HfC-HfB2复合材料电弧风洞抗烧蚀前驱体浸渍裂解
DOI:
10.7502/j.issn.1674-3962.2013.11.03
摘要:
以碳化铪有机前驱体、硼化铪有机前驱体和聚碳硅烷混合溶液为浸渍剂, 采用化学气相渗透(CVI)和液相浸渍-裂解(PIP)工艺制得了准3D C/C-HfB2-HfC-SiC碳陶复合材料。采用电弧风洞结合扫描电子显微镜(SEM)和X射线衍射分析(XRD)对复合材料的结构及氧化失效行为进行了初步探讨。结果表明,高密度的基体改性C/C-HfB2-HfC-SiC复合材料具有良好的抗烧蚀性能,复合材料在2300K/600s电弧风洞(含水5%)试验条件下的质量烧蚀率和线烧蚀率分别仅为1.22×10-6 g/(cm2·s) 和 1.33×10-5mm/s。密度和温度对复合材料抗烧蚀性能影响较大,密度从2.63g/cm3增加到3.75g/cm3时,复合材料在2300k条件下的线烧蚀率降低了三个数量级,当温度从2300k升高的2400k时,材料的线烧蚀率增加了约1000倍,烧蚀过程中较高密度的复合材料表面容易形成更为致密的氧化膜是其具有良好的抗氧性能的重要因素。
Abstract:
The quasi three dimension carbon/carbon-hafnium carbide-hafnium diboride杝ilicon carbide (3D C/C-HfC-HfB2-SiC) composites, which made use of a hybrid precursor contained polycarbosilane and organic HfB2 polymeric precursor and organic HfC polymeric precursor, were prepared through chemical vapor infiltration (CVI) and then treated by precursor infiltration and pyrolysis (PIP) process. The components and microstructures of the ablated samples were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis,respectively. The results show that C/C-HfC-HfB2-SiC composites with high density have wonderful anti-ablation properties. After ablation at 2300k (5wt.% H2O contained) for 600s via arc heated wind tunnel test, the mass loss and linear recession rate is as low as 1.22?0-6 g/(cm2穝) and 1.33?0-5mm/s, respectively. Density and temperature were two very important factors to anti-ablation of the composites. The linear recession rate of the composites decreased three orders of magnitude when density of the composites increased form 2.63g/cm3 to 3.75g/cm3. And the linear recession rate rised by one thousand times from 2300k to 2400k. It is found that during ultra-high temperature stage, a high density membrane could easier got on the surface of the high density composites. It could effectively cover the ablation surface and therefore promote its anti-ablation property

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更新日期/Last Update: 2013-11-04