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Preparation method of component- gradient -controllable multi-element ultrahigh-temperature ceramic modified C/C composite material
The invention discloses a preparation method of a component-gradient-controllable multi-element ultrahigh-temperature ceramic modified C/C composite material. Through multi-section design of various ultrahigh-temperature ceramics (ZrC, HfC, HfB2 and the like) and high-temperature ceramic (SiC) composite modified C/C composite materials, a ceramic phase forms a continuous component gradient distribution form in a C/C matrix, ablation resistance and oxidation resistance requirements of different temperature range fields are met regionally, and meanwhile the defect that the mechanical property isreduced due to component mutation is overcome. According to the invention, a preparation process of combining molten salt infiltration and common reaction infiltration and gradient infiltration powder configuration are adopted in sections, so that near-ablation-end strong ceramic phase interface design is realized, and ceramic phase distribution realizing that the content of an ultrahigh-temperature ceramic phase is sequentially decreased from the near ablation end to a far ablation end and the high-temperature ceramic phase is sequentially increased is regulated and controlled; finally, thegradient ceramic-based composite material with different ceramic phase components and contents in gradient change and meeting the performance requirements of the material is formed.
本发明公开了一种成分梯度可控多元超高温陶瓷改性C/C复合材料的制备方法，通过多种超高温陶瓷(ZrC、HfC、HfB2等)和高温陶瓷(SiC)复合改性C/C复合材料的多段设计，使陶瓷相在C/C基体内部形成连续成分梯度分布形态，实现分区域应对不同温域场的抗烧蚀抗氧化性能要求，同时避免成分突变引起的力学性能降低的缺点。本发明分段采用熔盐熔渗和普通反应熔渗相结合的制备工艺，以及梯度熔渗粉料配置，实现了近烧蚀端的强陶瓷相界面设计，以及近烧蚀端向远烧蚀端方向，超高温陶瓷相含量依次递减，而高温陶瓷相依次递增陶瓷相分布调控，最终形成了一种满足材料性能要求的不同陶瓷相成分和含量呈梯度变化的梯度陶瓷基复合材料。
Preparation method of component- gradient -controllable multi-element ultrahigh-temperature ceramic modified C/C composite material
The invention discloses a preparation method of a component-gradient-controllable multi-element ultrahigh-temperature ceramic modified C/C composite material. Through multi-section design of various ultrahigh-temperature ceramics (ZrC, HfC, HfB2 and the like) and high-temperature ceramic (SiC) composite modified C/C composite materials, a ceramic phase forms a continuous component gradient distribution form in a C/C matrix, ablation resistance and oxidation resistance requirements of different temperature range fields are met regionally, and meanwhile the defect that the mechanical property isreduced due to component mutation is overcome. According to the invention, a preparation process of combining molten salt infiltration and common reaction infiltration and gradient infiltration powder configuration are adopted in sections, so that near-ablation-end strong ceramic phase interface design is realized, and ceramic phase distribution realizing that the content of an ultrahigh-temperature ceramic phase is sequentially decreased from the near ablation end to a far ablation end and the high-temperature ceramic phase is sequentially increased is regulated and controlled; finally, thegradient ceramic-based composite material with different ceramic phase components and contents in gradient change and meeting the performance requirements of the material is formed.
本发明公开了一种成分梯度可控多元超高温陶瓷改性C/C复合材料的制备方法，通过多种超高温陶瓷(ZrC、HfC、HfB2等)和高温陶瓷(SiC)复合改性C/C复合材料的多段设计，使陶瓷相在C/C基体内部形成连续成分梯度分布形态，实现分区域应对不同温域场的抗烧蚀抗氧化性能要求，同时避免成分突变引起的力学性能降低的缺点。本发明分段采用熔盐熔渗和普通反应熔渗相结合的制备工艺，以及梯度熔渗粉料配置，实现了近烧蚀端的强陶瓷相界面设计，以及近烧蚀端向远烧蚀端方向，超高温陶瓷相含量依次递减，而高温陶瓷相依次递增陶瓷相分布调控，最终形成了一种满足材料性能要求的不同陶瓷相成分和含量呈梯度变化的梯度陶瓷基复合材料。
Preparation method of component- gradient -controllable multi-element ultrahigh-temperature ceramic modified C/C composite material
一种成分梯度可控多元超高温陶瓷改性C/C复合材料的制备方法
SUN WEI (author) / TIAN TIAN (author) / XIONG XIANG (author) / ZHANG HONGBO (author) / ZENG YI (author) / WANG YALEI (author) / CHEN ZHAOKE (author) / YIN JIAN (author)
2021-03-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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