| 反应熔渗制备ZrC-SiC/(C/C)复合材料组织结构及耐烧蚀性能 |
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| 引用本文： | 孙泽旭,周哲,张贝,易君,易茂中,冉丽萍.反应熔渗制备ZrC-SiC/(C/C)复合材料组织结构及耐烧蚀性能[J].复合材料学报,2019,36(10):2371-2379. |
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| 作者姓名： | 孙泽旭 周哲 张贝 易君 易茂中 冉丽萍 |
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| 作者单位： | 中南大学 粉末冶金国家重点实验室, 长沙 410083 |
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| 基金项目： | 长时抗氧化碳/碳复合材料×××研究（442202××××） |
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| 摘 要： | 采用反应熔渗法（RMI）制备出密度为3.288 g/cm3的ZrC-SiC/（C/C）复合材料，采用SEM-EDS、XRD和TEM等分析手段研究了ZrC-SiC/（C/C）复合材料的微观组织结构。结果表明:陶瓷相填充充分且均匀分布在C/C复合材料基体中，其内部组织主要由ZrC、SiC、热解炭（PyC）和碳纤维（CF）组成。熔渗剂反应充分，复合材料内部未检测到残余未反应金属Zr、Si。采用氧乙炔烧蚀设备检测ZrC-SiC/（C/C）复合材料在2 500℃下，烧蚀时间分别为30 s、60 s和90 s的烧蚀性能，其质量烧蚀率分别为5.667 mg/s、2.907 mg/s和3.030 mg/s，线烧蚀率分别为1.001 μm/s、4.662 μm/s和4.450 μm/s。试验结果表明，在高温烧蚀过程中，ZrC-SiC/（C/C）复合材料烧蚀中心区陶瓷相逐渐氧化生成ZrO2和SiO2；生成的ZrO2和SiO2混合物保护并填充复合材料烧蚀孔隙，阻止氧化反应向材料内部进行，有效提高了材料的烧蚀性能。
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| 关 键 词： | C/C复合材料 反应熔渗(RMI) ZrC-SiC/(C/C) 烧蚀性能 烧蚀机制 |
| 收稿时间： | 2018-10-18 |
Microstructure and ablation properties of ZrC-SiC/(C/C) composite prepared by reaction melting infiltration |
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| SUN Zexu,ZHOU Zhe,ZHANG Bei,YI Jun,YI Maozhong,RAN Liping.Microstructure and ablation properties of ZrC-SiC/(C/C) composite prepared by reaction melting infiltration[J].Acta Materiae Compositae Sinica,2019,36(10):2371-2379. |
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| Authors: | SUN Zexu ZHOU Zhe ZHANG Bei YI Jun YI Maozhong RAN Liping |
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| Affiliation: | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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| Abstract: | Reaction melt infiltration (RMI) was adopted to prepare ZrC-SiC/(C/C) composites with a density of 3.288 g/cm3. The analysis methods such as SEM-EDS, XRD and TEM were used to discuss the microstructure of ZrC-SiC/(C/C) composites. The results show that the ceramic phase has been fully and uniformly filled in the matrices of C/C composites, whose internal structure mainly consists of ZrC, SiC, pyrolytic carbon(PyC) and carbon fiber(CF). The infiltrant reacted fully and no residual metals Zr and Si were detected in the composites. The ablation properties of ZrC-SiC/(C/C) composites were determined at 2 500℃ after ablation for 30 s, 60 s and 90 s with the oxyacetylene ablation equipment. The mass ablation rates are 5.667 mg/s, 2.907 mg/s and 3.030 mg/s and the linear ablation rates are 1.001 μm/s, 4.662 μm/s and 4.450 μm/s. Test ablation results show that the ceramic phase in the ablation center of ZrC-SiC/(C/C) composites is gradually oxidized to produce ZrO2 and SiO2 during the high-temperature ablation. The resulting binary glassy mixture protects and fills the ablation pores of the composites, so as to avoid the occurrence of oxidation reaction in the composites and improve the ablation properties of such materials effectively. |
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| Keywords: | C/C composite reaction melting infiltration(RMI) ZrC-SiC/(C/C) ablation resistance ablation mechanism |
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