A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SiC/SiC-HfB2 dual-phase inlaid anti-oxidation coating prepared based on microporous skeleton structure and preparation method thereof
The invention relates to a SiC/SiC-HfB2 double-phase inlaid anti-oxidation coating prepared based on a microporous skeleton structure and a preparation method thereof, and aims to solve the problems that an ultrahigh-temperature ceramic HfB2 phase prepared by an existing method is non-uniform in distribution in a coating and the coating is rich in low-melting-point free silicon and to improve the long-life anti-oxidation performance of a carbon/carbon composite material at a high temperature. According to the technical scheme, a SiC inner coating is prepared on the surface of a C/C composite material through solid infiltration reaction sintering, then a SiC-HfB2 coating containing SiO2 hollow microspheres is prepared on the surface of the SiC inner coating through supersonic plasma spraying, the SiO2 hollow microspheres are volatilized through high-temperature heat treatment to generate a microporous HfB2 framework layer, and finally the microporous framework layer is filled with SiC through a low-temperature chemical vapor infiltration process so as to finally prepare the compact SiC-HfB2 anti-oxidation coating in which HfB2 is uniformly distributed and free silicon is not contained.
本发明涉及一种基于微孔骨架结构制备SiC/SiC‑HfB2双相镶嵌抗氧化涂层及制备方法，用于解决现有方法制备的超高温陶瓷HfB2相在涂层中分布不均匀和涂层富含低熔点游离硅的问题，以期提高碳/碳复合材料在高温下的长寿命抗氧化性能。本发明的技术方案是先通过固渗反应烧结在C/C复合材料表面制备SiC内涂层，然后在SiC内涂层表面采用超音速等离子喷涂制备含有SiO2空心微球的SiC‑HfB2涂层，再经高温热处理将SiO2空心微球挥发掉后生成微孔HfB2骨架层，最后经过低温化学气相渗透工艺将SiC填充于该微孔骨架层中，最终制备出了HfB2均匀分布、不含游离硅、致密的SiC‑HfB2抗氧化涂层。
SiC/SiC-HfB2 dual-phase inlaid anti-oxidation coating prepared based on microporous skeleton structure and preparation method thereof
The invention relates to a SiC/SiC-HfB2 double-phase inlaid anti-oxidation coating prepared based on a microporous skeleton structure and a preparation method thereof, and aims to solve the problems that an ultrahigh-temperature ceramic HfB2 phase prepared by an existing method is non-uniform in distribution in a coating and the coating is rich in low-melting-point free silicon and to improve the long-life anti-oxidation performance of a carbon/carbon composite material at a high temperature. According to the technical scheme, a SiC inner coating is prepared on the surface of a C/C composite material through solid infiltration reaction sintering, then a SiC-HfB2 coating containing SiO2 hollow microspheres is prepared on the surface of the SiC inner coating through supersonic plasma spraying, the SiO2 hollow microspheres are volatilized through high-temperature heat treatment to generate a microporous HfB2 framework layer, and finally the microporous framework layer is filled with SiC through a low-temperature chemical vapor infiltration process so as to finally prepare the compact SiC-HfB2 anti-oxidation coating in which HfB2 is uniformly distributed and free silicon is not contained.
本发明涉及一种基于微孔骨架结构制备SiC/SiC‑HfB2双相镶嵌抗氧化涂层及制备方法，用于解决现有方法制备的超高温陶瓷HfB2相在涂层中分布不均匀和涂层富含低熔点游离硅的问题，以期提高碳/碳复合材料在高温下的长寿命抗氧化性能。本发明的技术方案是先通过固渗反应烧结在C/C复合材料表面制备SiC内涂层，然后在SiC内涂层表面采用超音速等离子喷涂制备含有SiO2空心微球的SiC‑HfB2涂层，再经高温热处理将SiO2空心微球挥发掉后生成微孔HfB2骨架层，最后经过低温化学气相渗透工艺将SiC填充于该微孔骨架层中，最终制备出了HfB2均匀分布、不含游离硅、致密的SiC‑HfB2抗氧化涂层。
SiC/SiC-HfB2 dual-phase inlaid anti-oxidation coating prepared based on microporous skeleton structure and preparation method thereof
基于微孔骨架结构制备SiC/SiC-HfB2双相镶嵌抗氧化涂层及制备方法
ZHANG YULEI (author) / ZHU XIAOFEI (author) / ZHANG JIAN (author) / CHEN RUICONG (author)
2021-12-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
SiC/HfB2-SiC double-phase inlaid coating as well as preparation method and application thereof
| European Patent Office | 2024
Dual-phase inlaid medium-entropy oxide anti-ablation ceramic and preparation method thereof
| European Patent Office | 2024
Crystal element inlaid floor and preparation method thereof
| European Patent Office | 2022
C/HfB2-HfC-Cu composite material and preparation method thereof
| European Patent Office | 2023
British Library Online Contents | 2007