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High-temperature and high-pressure synthesis method of carbon fiber reinforced and toughened ceramic composite material
The invention discloses a high-temperature and high-pressure preparation method of a carbon fiber reinforced and toughened ceramic composite material, and belongs to the technical field of preparation of ceramic composite materials. The method comprises the following steps: firstly, carrying out surface coating treatment on nickel-plated carbon fibers: adding a silane coupling agent into an alcohol-water solution, fully hydrolyzing, then adding nickel-plated PAN-based carbon fibers and nano silicon powder, carrying out suction filtration on the solution after the reaction is completed, drying to obtain modified carbon fibers with a surface film layer structure of Ni-Si-SiO2, loading the modified carbon fibers into an assembly block of a cubic press, and carrying out vacuum drying to obtain the nickel-plated PAN-based carbon fibers with the surface film layer structure of Ni-Si-SiO2. And putting the mixture into a cubic press, and sintering and pressing for 10-30 minutes under the conditions that the temperature is 1100-1500 DEG C and the pressure is 1-5 GPa to obtain the block reinforced and toughened ceramic composite material. The phase structure and the coating thickness of the gel layer on the surface of the carbon fiber are adjusted by adding the nano silicon powder, the brittleness of the ceramic phase material is improved, and the silicon oxide-based ceramic composite material with the overall organization structure being nanocrystal grains and having the self-lubricating/anti-attrition, heat-resistant and corrosion-resistant functions is synthesized.
本发明的一种碳纤维增强增韧陶瓷复合材料的高温高压制备方法属于陶瓷复合材料的制备技术领域。首先对镀镍碳纤维进行表面包覆处理：将硅烷偶联剂加入到醇水溶液中，充分水解后加入镀镍PAN基碳纤维和纳米硅粉，反应完成后对溶液进行抽滤、烘干得到表面膜层结构为“Ni‑Si‑SiO2”的改性碳纤维，将其装于六面顶压机的组装块中，置入六面顶压机，在1100～1500℃、1～5GPa条件下烧结压制10～30分钟，得到块体的增强增韧陶瓷复合材料。本发明通过加入纳米硅粉调整碳纤维表面凝胶层物相结构及包覆厚度，改善陶瓷相材料的脆性，合成了整体组织结构均为纳米晶粒并具有自润滑/减磨、耐热/耐蚀的氧化硅基陶瓷复合材料。
High-temperature and high-pressure synthesis method of carbon fiber reinforced and toughened ceramic composite material
The invention discloses a high-temperature and high-pressure preparation method of a carbon fiber reinforced and toughened ceramic composite material, and belongs to the technical field of preparation of ceramic composite materials. The method comprises the following steps: firstly, carrying out surface coating treatment on nickel-plated carbon fibers: adding a silane coupling agent into an alcohol-water solution, fully hydrolyzing, then adding nickel-plated PAN-based carbon fibers and nano silicon powder, carrying out suction filtration on the solution after the reaction is completed, drying to obtain modified carbon fibers with a surface film layer structure of Ni-Si-SiO2, loading the modified carbon fibers into an assembly block of a cubic press, and carrying out vacuum drying to obtain the nickel-plated PAN-based carbon fibers with the surface film layer structure of Ni-Si-SiO2. And putting the mixture into a cubic press, and sintering and pressing for 10-30 minutes under the conditions that the temperature is 1100-1500 DEG C and the pressure is 1-5 GPa to obtain the block reinforced and toughened ceramic composite material. The phase structure and the coating thickness of the gel layer on the surface of the carbon fiber are adjusted by adding the nano silicon powder, the brittleness of the ceramic phase material is improved, and the silicon oxide-based ceramic composite material with the overall organization structure being nanocrystal grains and having the self-lubricating/anti-attrition, heat-resistant and corrosion-resistant functions is synthesized.
本发明的一种碳纤维增强增韧陶瓷复合材料的高温高压制备方法属于陶瓷复合材料的制备技术领域。首先对镀镍碳纤维进行表面包覆处理：将硅烷偶联剂加入到醇水溶液中，充分水解后加入镀镍PAN基碳纤维和纳米硅粉，反应完成后对溶液进行抽滤、烘干得到表面膜层结构为“Ni‑Si‑SiO2”的改性碳纤维，将其装于六面顶压机的组装块中，置入六面顶压机，在1100～1500℃、1～5GPa条件下烧结压制10～30分钟，得到块体的增强增韧陶瓷复合材料。本发明通过加入纳米硅粉调整碳纤维表面凝胶层物相结构及包覆厚度，改善陶瓷相材料的脆性，合成了整体组织结构均为纳米晶粒并具有自润滑/减磨、耐热/耐蚀的氧化硅基陶瓷复合材料。
High-temperature and high-pressure synthesis method of carbon fiber reinforced and toughened ceramic composite material
一种碳纤维增强增韧陶瓷复合材料的高温高压合成方法
DONG SHUSHAN (author) / FU YUBO (author) / GUO YU (author) / DONG JUNYAN (author) / TAO QIANG (author) / ZHU PINWEN (author)
2024-11-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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