聚合物浸渍裂解法制备C/C-ZrC-SiC-ZrB2复合材料及其性能研究

doi:10.3724/SP.J.1077.2013.12450

无机材料学报 ›› 2013, Vol. 28 ›› Issue (06): 605-610.DOI: 10.3724/SP.J.1077.2013.12450

聚合物浸渍裂解法制备C/C-ZrC-SiC-ZrB₂复合材料及其性能研究

解静, 李克智, 付前刚, 李贺军, 姚西媛

(西北工业大学凝固技术国家重点实验室, 炭/炭复合材料工程技术研究中心, 西安 710072)

收稿日期:2012-07-18 修回日期:2012-09-04 出版日期:2013-06-20 网络出版日期:2013-05-20
作者简介:解静(1986–), 女, 博士研究生. E-mail: xj1024921@126.com
基金资助:
国家自然科学基金(910160029; 50902111)

Preparation and Properties of C/C-ZrC-SiC-ZrB₂ Composites via Polymer Infiltration and Pyrolysis

XIE Jing, LI Ke-Zhi, FU Qian-Gang, LI He-Jun, YAO Xi-Yuan

(C/C Composites Research Shanghai Center, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China)

Received:2012-07-18 Revised:2012-09-04 Published:2013-06-20 Online:2013-05-20
About author:XIE Jing. E-mail: xj1024921@126.com
Supported by:
National Natural Science Foundation of China (910160029, 50902111)

摘要/Abstract

摘要： 以有机ZrC、ZrB₂前驱体和聚碳硅烷的混合溶液为浸渍前驱体, 利用聚合物浸渍裂解法(PIP)制备了C/C-ZrC-SiC-ZrB₂复合材料, 并对材料的微观形貌、弯曲和烧蚀性能进行了研究。研究结果表明: 利用该方法可制备出陶瓷相填充充分且分布均匀的C/C-ZrC-SiC-ZrB₂复合材料。材料的弯曲强度为126.31 MPa, 断面有大量的纤维束拔出, 表现出良好的假塑性断裂模式。经过120 s氧–乙炔烧蚀, 材料无明显烧蚀, 其线烧蚀率和质量烧蚀率分别为–2.50×10^-4 mm/s和–1.33×10^-4 g/s。在材料表面不同区域形成不同的保护层, 不仅能够降低氧气和热流向材料内部扩散, 还具有弥补缺陷的作用, 使材料表现出优异的抗烧蚀性能。

关键词: 聚合物浸渍裂解法, C/C-ZrC-SiC-ZrB₂复合材料, 力学性能, 烧蚀

Abstract: C/C-ZrC-SiC-ZrB₂ composites were prepared by precursor infiltration and pyrolysis (PIP) process using a mixture solution of organic ZrC, ZrB₂ precursor and polycarbosilane as precursor. Microstructure, flexural property and ablation behavior of the composites were studied. The results show that the composites produced by PIP have a homogeneity distribution of ceramic phase. The flexural strength of the composites is 126.31 MPa. There are a large number of carbon fiber bundles pulled-out, and the composites exhibit a pseudo-plastic fracture behavior. After ablated for 120 s by oxyacetylene flame, the composites show no significant ablation, and their linear and mass ablation rates are –2.50×10^-4 mm/s and –1.33×10^-4 g/s, respectively. Different kinds of protective coatings form on the different regions of ablated surface, which can not only reduce the diffusion of oxygen and heat but also remedy defects effectively, and thereby greatly improves the ablation resistance of the composites.

Key words: polymer infiltration and pyrolysis, C/C-ZrC-SiC-ZrB₂ composites, mechanical property, ablation

中图分类号:

TB332

解静, 李克智, 付前刚, 李贺军, 姚西媛. 聚合物浸渍裂解法制备C/C-ZrC-SiC-ZrB₂复合材料及其性能研究[J]. 无机材料学报, 2013, 28(06): 605-610.

XIE Jing, LI Ke-Zhi, FU Qian-Gang, LI He-Jun, YAO Xi-Yuan. Preparation and Properties of C/C-ZrC-SiC-ZrB₂ Composites via Polymer Infiltration and Pyrolysis[J]. Journal of Inorganic Materials, 2013, 28(06): 605-610.

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聚合物浸渍裂解法制备C/C-ZrC-SiC-ZrB₂复合材料及其性能研究

Preparation and Properties of C/C-ZrC-SiC-ZrB₂ Composites via Polymer Infiltration and Pyrolysis

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