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Preparation method of antioxidant SiCf/SiC-HfB2 composite material
The invention relates to a preparation method of an antioxidant SiCf/SiC-HfB2 composite material, belongs to the technical field of preparation of ceramic-based composite materials, and solves the problems of insufficient modified phase content and inoxidizability of the SiCf/SiC composite material in the prior art. The SiCf/SiC-HfB2 composite material with a high HfB2 volume fraction is prepared by combining a slurry impregnation (SI) and precursor impregnation pyrolysis (PIP) densification process, and a glass phase generated during oxidation of HfB2 and SiC matrixes is utilized to heal oxide layer cracks, prevent oxygen from entering and improve the oxidation resistance.
本发明涉及一种抗氧化SiCf/SiC‑HfB2复合材料的制备方法，属于陶瓷基复合材料的制备技术领域，解决了现有技术中SiCf/SiC复合材料改性相含量和抗氧化性不足的问题，本发明通过熔盐辅助硼热还原工艺制备了亚微米级别的HfB2粉末，结合浆料浸渍(SI)和前驱体浸渍裂解(PIP)致密化工艺，制备含有高HfB2体积分数的SiCf/SiC‑HfB2复合材料，利用HfB2和SiC基体氧化时生成的玻璃相，愈合氧化层裂纹，阻碍氧气进入，提升抗氧化性能。
Preparation method of antioxidant SiCf/SiC-HfB2 composite material
The invention relates to a preparation method of an antioxidant SiCf/SiC-HfB2 composite material, belongs to the technical field of preparation of ceramic-based composite materials, and solves the problems of insufficient modified phase content and inoxidizability of the SiCf/SiC composite material in the prior art. The SiCf/SiC-HfB2 composite material with a high HfB2 volume fraction is prepared by combining a slurry impregnation (SI) and precursor impregnation pyrolysis (PIP) densification process, and a glass phase generated during oxidation of HfB2 and SiC matrixes is utilized to heal oxide layer cracks, prevent oxygen from entering and improve the oxidation resistance.
本发明涉及一种抗氧化SiCf/SiC‑HfB2复合材料的制备方法，属于陶瓷基复合材料的制备技术领域，解决了现有技术中SiCf/SiC复合材料改性相含量和抗氧化性不足的问题，本发明通过熔盐辅助硼热还原工艺制备了亚微米级别的HfB2粉末，结合浆料浸渍(SI)和前驱体浸渍裂解(PIP)致密化工艺，制备含有高HfB2体积分数的SiCf/SiC‑HfB2复合材料，利用HfB2和SiC基体氧化时生成的玻璃相，愈合氧化层裂纹，阻碍氧气进入，提升抗氧化性能。
Preparation method of antioxidant SiCf/SiC-HfB2 composite material
一种抗氧化SiCf/SiC-HfB2复合材料的制备方法
LI LU (author) / GUO RURU (author) / ZHENG RUIXIAO (author) / MA CHAOLI (author) / LI ZHIJIAN (author)
2023-09-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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