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A platform for research: civil engineering, architecture and urbanism
Interlayer closed-pore heat-insulating interface phase as well as preparation method and application thereof
The invention relates to an interlayer closed-pore heat-insulating interface phase and a preparation method and application thereof.The preparation method includes the steps that a SiCO interface layer is deposited on the surface of woven fiber cloth through a CVI technology to protect fibers against subsequent technology damage and environmental oxygen erosion, then organic slurry containing Sc2SiO5 is introduced into SiC fiber cloth containing the SiCO interface layer through a vacuum impregnation method, the fiber cloth is stacked, and the interlayer closed-pore heat-insulating interface phase is obtained; the preparation method comprises the following steps: preparing a SiCO interface layer on the surface of the SiCO interface layer, pressurizing, heating and curing, then pressurizing and cracking in a tubular furnace, preparing a film-like porous Sc2SiO5 layer on the surface of the SiCO interface layer, and finally preparing a SiBN interface layer with a high crystallization degree on the surface of the film-like porous Sc2SiO5 layer by adopting a CVI (Chemical Vapor Infiltration) process, thereby forming the SiCO-Sc2SiO5-SiBN interlayer closed-pore heat-insulating interface phase. The interlayer closed-pore heat-insulating interface phase formed by combining the three interface layers reduces the actual temperature of the fiber by about 100 DEG C on the premise of ensuring the obdurability of the SiC/SiC composite material, so that the problem that the temperature resistance of the domestic fiber is to be improved at the present stage is expected to be solved, and the use temperature of the SiC/SiC composite material is further improved.
本发明涉及一种夹层闭孔隔热界面相及其制备方法和应用，采用CVI工艺在编织的纤维布表面沉积一层SiCO界面层保护纤维免受后续工艺损伤和环境氧侵蚀，再将含Sc2SiO5的有机浆料通过真空浸渍的方法引入到含有SiCO界面层的SiC纤维布内，将纤维布叠层，加压升温固化，随后将其在管式炉内加压裂解，在SiCO界面层表面制备膜状多孔Sc2SiO5层，最后采用CVI工艺在膜状多孔Sc2SiO5层表面制备高晶化程度的SiBN界面层，由此形成SiCO‑Sc2SiO5‑SiBN夹层闭孔隔热界面相。三种界面层组合形成的夹层闭孔隔热界面相在保证SiC/SiC复合材料强韧性的前提下，将纤维所受实际温度降低100℃左右，有望解决现阶段国产纤维耐温性待提升的问题，进一步提高SiC/SiC复合材料的使用温度。
Interlayer closed-pore heat-insulating interface phase as well as preparation method and application thereof
The invention relates to an interlayer closed-pore heat-insulating interface phase and a preparation method and application thereof.The preparation method includes the steps that a SiCO interface layer is deposited on the surface of woven fiber cloth through a CVI technology to protect fibers against subsequent technology damage and environmental oxygen erosion, then organic slurry containing Sc2SiO5 is introduced into SiC fiber cloth containing the SiCO interface layer through a vacuum impregnation method, the fiber cloth is stacked, and the interlayer closed-pore heat-insulating interface phase is obtained; the preparation method comprises the following steps: preparing a SiCO interface layer on the surface of the SiCO interface layer, pressurizing, heating and curing, then pressurizing and cracking in a tubular furnace, preparing a film-like porous Sc2SiO5 layer on the surface of the SiCO interface layer, and finally preparing a SiBN interface layer with a high crystallization degree on the surface of the film-like porous Sc2SiO5 layer by adopting a CVI (Chemical Vapor Infiltration) process, thereby forming the SiCO-Sc2SiO5-SiBN interlayer closed-pore heat-insulating interface phase. The interlayer closed-pore heat-insulating interface phase formed by combining the three interface layers reduces the actual temperature of the fiber by about 100 DEG C on the premise of ensuring the obdurability of the SiC/SiC composite material, so that the problem that the temperature resistance of the domestic fiber is to be improved at the present stage is expected to be solved, and the use temperature of the SiC/SiC composite material is further improved.
本发明涉及一种夹层闭孔隔热界面相及其制备方法和应用，采用CVI工艺在编织的纤维布表面沉积一层SiCO界面层保护纤维免受后续工艺损伤和环境氧侵蚀，再将含Sc2SiO5的有机浆料通过真空浸渍的方法引入到含有SiCO界面层的SiC纤维布内，将纤维布叠层，加压升温固化，随后将其在管式炉内加压裂解，在SiCO界面层表面制备膜状多孔Sc2SiO5层，最后采用CVI工艺在膜状多孔Sc2SiO5层表面制备高晶化程度的SiBN界面层，由此形成SiCO‑Sc2SiO5‑SiBN夹层闭孔隔热界面相。三种界面层组合形成的夹层闭孔隔热界面相在保证SiC/SiC复合材料强韧性的前提下，将纤维所受实际温度降低100℃左右，有望解决现阶段国产纤维耐温性待提升的问题，进一步提高SiC/SiC复合材料的使用温度。
Interlayer closed-pore heat-insulating interface phase as well as preparation method and application thereof
一种夹层闭孔隔热界面相及其制备方法和应用
YE FANG (author) / GUO GUANGDA (author) / CHENG LAIFEI (author) / ZHANG LITONG (author)
2023-08-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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