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| 带复相涂层RMI C/SiC复合材料的抗激光烧蚀行为和机理 |
| Laser ablation behavior and mechanism of RMI C/SiC composites with multiphase coatings |
| 投稿时间：2024-04-30 修订日期：2024-05-10 |
| DOI： |
| 中文关键词: 陶瓷涂层 RMI-C/SiC 激光烧蚀 力学性能 |
| 英文关键词: Ceramic coating RMI-C/SiC Laser ablation Mechanical property |
| 基金项目:国家自然科学基金项目 |
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| 摘要点击次数: 67 |
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| 中文摘要: |
| 采用kW级高能激光烧蚀实验研究了带ZrB2-SiC-ZrO2-SiO2复相陶瓷涂层的C/SiC复合材料的耐烧蚀性能和损伤机理。结果表明，烧蚀后的样品呈现典型的环形烧蚀形态。烧蚀后涂层中心产物以ZrO2和SiO2为主，边缘以SiO2为主。当涂层厚度为0.5 mm，烧蚀时间为10 s时，样品S1的线性烧蚀速率为0.070 mm/s；当涂层厚度增加到1mm时，烧蚀时间保持为10 s时，样品S2的线性烧蚀速率增加到0.116mm/s；当涂层厚度为1mm，烧蚀时间为20s，样品S3线性烧蚀速率为0.076mm/s。在上述S1-S3样品中，C/SiC基材相应的线性烧蚀速率分别为0.020mm/s、0.016mm/s和0.026mm/s。复相陶瓷涂层的存在可以有效降低C/SiC基材的烧蚀损伤程度，烧蚀后基材的弯曲强度保持率仍然保持在82.5% -91.5%的高范围内。 |
| 英文摘要: |
| The ablation resistance and damage mechanism of C/SiC composites with ZrB2-SiC-ZrO2-SiO2 multiphase ceramic coatings were studied using kW level high-energy laser ablation experiments. The results show that the ablated samples exhibited typical annular ablation morphologies after ablation. ZrO2 and SiO2 dominated at the center of the coating after ablation, while SiO2 dominated at the edges. S1 sample with a coating thickness of 0.5 mm and an ablation time of 10 s has a linear ablation rate of 0.070 mm/s, which increases to 0.116mm/s when the coating thickness increases to 1mm in S2 sample. S3 sample, with a coating thickness of 1mm and an ablation time of 20s, has a linear ablation rate of 0.076mm/s. The corresponding linear ablation rates of C/SiC substrates in the above S1-S3 samples are 0.020mm/s, 0.016mm/s, and 0.026mm/s, respectively. The presence of multiphase ceramic coatings can effectively reduce the degree of ablation damage to C/SiC substrates, which still have a high range of bending strength retention rates of 82.5% - 91.5% after ablation. |
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