RMI法制备涂层基集成C/(Hf, Zr, Ti)C-(Ti, Zr, Hf)3SiC2-SiC复合材料的组织与性能

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-06-27 DOI:10.1016/j.jeurceramsoc.2025.117642

Xian Liu , Sijie Kou , Shaobo Yang , Chun Guo , Yujie Chen , Shangwu Fan , Xu Ma

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引用次数: 0

摘要

以HfSi2-ZrSi2-TiSi2杂化合金为材料，采用RMI工艺制备了C/(Hf, Zr, Ti)C-(Ti, Zr, Hf)3SiC2-SiC复合材料，并具有Hf-Zr-Ti基原位涂层。研究了复合材料的显微组织、力学性能和烧蚀性能。以（Hf, Zr, Ti）C-(Hf, Zr, Ti)Si2为主要成分的原位涂层与基体不断结合。在衬底中，边缘有较多的富Hf (Hf, Zr, Ti)C，内部有较多的富Ti (Ti, Zr, Hf)3SiC2和SiC。在层状（Ti, Zr, Hf）3SiC2的作用下，复合材料的抗折强度为225 ± 5.93 MPa，断裂韧性为11 ± 0.85 MPa·m1/2。烧蚀60 s后，复合材料的线性烧蚀速率为−2.13 ± 0.91 μm/s，质量烧蚀速率为−0.97 ± 0.01 mg/s。玻璃状SiO2促进（Hf, Zr, Ti）O2烧结和液态TiO2修复缺陷，使材料具有优异的抗烧蚀性能。

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Microstructure and properties of coating-matrix integrated C/(Hf, Zr, Ti)C-(Ti, Zr, Hf)3SiC2-SiC composites prepared via RMI process

C/(Hf, Zr, Ti)C-(Ti, Zr, Hf)₃SiC₂-SiC composites with Hf-Zr-Ti based in-situ coatings were prepared by RMI process utilizing HfSi₂-ZrSi₂-TiSi₂ hybrid alloy. The microstructure, mechanical properties, and ablation performance of the composites were investigated. The in-situ coating with (Hf, Zr, Ti)C-(Hf, Zr, Ti)Si₂ as main components was continuously integrated with the matrix. In the substrate, there were more Hf-rich (Hf, Zr, Ti)C in the marginal region and more Ti-rich (Ti, Zr, Hf)₃SiC₂ and SiC in the interior. The flexural strength of the composites was 225 ± 5.93 MPa and fracture toughness was 11 ± 0.85 MPa·m^1/2 under the effect of lamellar (Ti, Zr, Hf)₃SiC₂. After ablation for 60 s, the linear and mass ablation rates of the composites were −2.13 ± 0.91 μm/s and −0.97 ± 0.01 mg/s, respectively. The outstanding ablation resistance was attributed to the glassy SiO₂ promoting (Hf, Zr, Ti)O₂ sintering and liquid TiO₂ healing defects.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.