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Gradient ultrahigh-temperature ceramic-based composite material and preparation method thereof
The invention relates to a gradient ultrahigh-temperature ceramic matrix composite material and a preparation method thereof. The method adopts a reactive infiltration process to perform one-way high-temperature reactive infiltration on the porous low-density C/C base material, and comprises the following steps: firstly, flatly laying a silicon-zirconium or silicon-hafnium binary alloy infiltration agent at the bottom of a crucible, then placing the porous low-density C/C base material above the infiltration agent, and performing one-way infiltration under the capillary acting force of the porous low-density C/C base material. The high-melting-point matrix components (ZrC and HfC) in the prepared ultrahigh-temperature ceramic matrix composite are distributed in a gradient mode from bottom to top, the side, with the high content, of the high-melting-point matrix components (ZrC and HfC) has good oxidation ablation resistance, meanwhile, SiC with the relatively small molecular weight can reduce the weight of the whole material, and therefore the dual effects of oxidation ablation resistance and light weight are achieved.
本发明涉及一种梯度超高温陶瓷基复合材料及其制备方法。所述方法采用反应熔渗工艺对多孔低密度C/C基材进行单向高温反应熔渗，所述方法首先将硅锆或硅铪二元合金渗剂平铺于坩埚底部，然后将多孔低密度C/C基材放置于渗剂上方，在多孔低密度C/C基材毛细作用力下进行单向熔渗。本发明制备的超高温陶瓷基复合材料中高熔点基体组元(ZrC、HfC)由下往上呈梯度分布，高熔点基体组元(ZrC、HfC)含量高的一侧具有良好的抗氧化烧蚀性能，同时，相对分子量较小的SiC又能够减轻整体材料的重量，从而达到抗氧化烧蚀与轻量化的双重效果。
Gradient ultrahigh-temperature ceramic-based composite material and preparation method thereof
The invention relates to a gradient ultrahigh-temperature ceramic matrix composite material and a preparation method thereof. The method adopts a reactive infiltration process to perform one-way high-temperature reactive infiltration on the porous low-density C/C base material, and comprises the following steps: firstly, flatly laying a silicon-zirconium or silicon-hafnium binary alloy infiltration agent at the bottom of a crucible, then placing the porous low-density C/C base material above the infiltration agent, and performing one-way infiltration under the capillary acting force of the porous low-density C/C base material. The high-melting-point matrix components (ZrC and HfC) in the prepared ultrahigh-temperature ceramic matrix composite are distributed in a gradient mode from bottom to top, the side, with the high content, of the high-melting-point matrix components (ZrC and HfC) has good oxidation ablation resistance, meanwhile, SiC with the relatively small molecular weight can reduce the weight of the whole material, and therefore the dual effects of oxidation ablation resistance and light weight are achieved.
本发明涉及一种梯度超高温陶瓷基复合材料及其制备方法。所述方法采用反应熔渗工艺对多孔低密度C/C基材进行单向高温反应熔渗，所述方法首先将硅锆或硅铪二元合金渗剂平铺于坩埚底部，然后将多孔低密度C/C基材放置于渗剂上方，在多孔低密度C/C基材毛细作用力下进行单向熔渗。本发明制备的超高温陶瓷基复合材料中高熔点基体组元(ZrC、HfC)由下往上呈梯度分布，高熔点基体组元(ZrC、HfC)含量高的一侧具有良好的抗氧化烧蚀性能，同时，相对分子量较小的SiC又能够减轻整体材料的重量，从而达到抗氧化烧蚀与轻量化的双重效果。
Gradient ultrahigh-temperature ceramic-based composite material and preparation method thereof
一种梯度超高温陶瓷基复合材料及其制备方法
FENG SHIJIE (author) / ZHANG BAOPENG (author) / SONG HUANJUN (author) / YANG LIANGWEI (author) / SUN YANAN (author) / CHEN HAORAN (author) / YANG XIAOJIAN (author) / LI XIAODONG (author) / LIU WEI (author) / YU XINMIN (author)
2024-03-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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