| 刘天宇,付前刚,程春玉.颗粒冲蚀对注射法制备C/C-ZrC-SiC复合材料抗烧蚀性能的影响研究[J].装备环境工程,2019,16(10):8-15. LIU Tian-yu,FU Qian-gang,CHENG Chun-yu.Effects of Particle Impacting on Ablation Property of C/C-ZrC-SiC Composites Via Injection Method[J].Equipment Environmental Engineering,2019,16(10):8-15. |
| 颗粒冲蚀对注射法制备C/C-ZrC-SiC复合材料抗烧蚀性能的影响研究 |
| Effects of Particle Impacting on Ablation Property of C/C-ZrC-SiC Composites Via Injection Method |
| 投稿时间：2019-05-22 修订日期：2019-06-24 |
| DOI：10.7643/issn.1672-9242.2019.10.002 |
| 中文关键词: C/C复合材料 基体改性 ZrC SiC 颗粒冲蚀 高温烧蚀性能 |
| 英文关键词:C/C-ZrC-SiC composites matrix modification ZrC SiC particle erosion high temperature ablation property |
| 基金项目:国家自然科学基金(51572223，51872239) |
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| 中文摘要: |
| 目的 采用ZrC和SiC复相陶瓷对C/C复合材料进行改性，研究改性后的复合材料受到颗粒冲蚀破坏的烧蚀行为。方法 采用注射法将ZrC和SiC复相陶瓷前驱体引入到等温化学气相渗透法(ICVI)制备的低密度C/C复合材料中，再通过高温热处理、ICVI的方法制备出ZrC和SiC复相陶瓷改性的C/C(C/C-ZrC-SiC)复合材料，随后对制备的复合材料进行高速颗粒冲击实验破坏，并对破坏后的试样进行氧乙炔火焰烧蚀，研究其烧蚀行为。结果 改性后的复合材料线冲蚀率和质量冲蚀率分别为253.1 μm/s和79.8 mg/s，相较于同孔隙率的C/C复合材料分别降低了49.2%和61%。颗粒冲蚀破坏后C/C-ZrC-SiC复合材料的线烧蚀率和质量烧蚀率分别为4.26 μm/s和1.44 mg/s，相比于同孔隙率的C/C复合材料，分别降低了37%和39%。 结论 由于引入的ZrC和SiC陶瓷相的硬度大于碳基体，C/C-ZrC-SiC复合材料在受到高速颗粒的冲击时，能通过硬质陶瓷相起到抗冲击作用，使得改性后的复合材料抗冲蚀性能大幅度提高。受到颗粒冲蚀破坏后的C/C-ZrC-SiC复合材料内部仍存在超高温陶瓷相，烧蚀过程中能够形成ZrO2骨架结构和SiO2球形颗粒，进而有效保护碳纤维和热解碳基体。 |
| 英文摘要: |
| Objective To study the ablation behavior of modified composites damaged by particle impacting by modifying C/C composites with ZrC and SiC composite ceramics. Methods C/C composites were prepared by Isothermal Chemical vapor Infiltration (ICVI), and the precursors of ZrC and SiC ceramics were introduced into C/C composites by injection. Then the C/C-ZrC-SiC composites were prepared by heat-treatment and ICVI. The ablation resistance of the composites damaged by particle erosion was tested by high-speed particle impacting and oxyacetylene torch tests. Results The linear erosion rate and mass erosion rate of the modified material were 253.1 um/s and 79.8 mg/s respectively, which were 49.2% and 61% lower than those of the C/C composites with the same porosity. The linear ablation rate and mass ablation rate of the composites damaged by particle erosion were 4.26 um/s and 1.44 mg/s respectively, which were 37% and 39% lower than those of the C/C composites with the same porosity. Conclusion The hardness of ZrC and SiC ceramics is higher than that of carbon matrix, and it’s ceramic phase in the composite plays a role of impact resistance, which greatly improves the erosion resistance of the modified composites. There are still high-temperature ceramics phase in the C/C-ZrC-SiC composites damaged by particle impacting. The formed ZrO2 skeleton structure and SiO2 spherical particles in the composites can protect the carbon fibers and pyrolytic carbon matrix efficiently. |
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