摘要：【中文】本发明提供的碳化硅微粉表面硅烷化的改性方法及改性碳化硅微粉，将碳化硅微粉加入硅烷偶联剂混合溶液搅拌后得到碳化硅浆料，调节碳化硅浆料的PH值在碱性范围内，将碳化硅浆料干燥后得到硅烷化的改性碳化硅微粉。本发明提供碳化硅微粉表面硅烷化的改性方法，由于硅烷偶联剂是一类同时含有有机官能团和水解性无机官能团的分子无机填料，可与材料表面的活性基团形成化学键，水解性无机官能团水解成硅醇，硅醇与纳米碳化硅粉体表面的羟基形成氢键，硅羟基会凝聚失水，形成共价化合键，使偶联剂在纳米碳化硅粉体表面形成偶联层，可降低粉体的亲水性，减轻团聚现象，制备的改性碳化硅微粉分散性好、稳定性高，且制备工艺操作简单。 【EN】According to the modification method for silanization of the surface of the silicon carbide micro powder and the modified silicon carbide micro powder, provided by the invention, the silicon carbide micro powder is added into a silane coupling agent mixed solution and stirred to obtain silicon carbide slurry, the pH value of the silicon carbide slurry is adjusted within an alkaline range, and the silicon carbide slurry is dried to obtain the silanized modified silicon carbide micro powder. The invention provides a modification method for silanization of silicon carbide micropowder surface, because a silane coupling agent is a molecular inorganic filler containing an organic functional group and a hydrolytic inorganic functional group, a chemical bond can be formed with an active group on the material surface, the hydrolytic inorganic functional group is hydrolyzed into silanol, the silanol and a hydroxyl on the surface of the nano silicon carbide powder form a hydrogen bond, the silicon hydroxyl can be condensed and dehydrated to form a covalent chemical bond, so that the coupling agent forms a coupling layer on the surface of the nano silicon carbide powder, the hydrophilicity of the powder can be reduced, the agglomeration phenomenon can be reduced, the prepared modified silicon carbide micropowder has good dispersibility and high stability, and the preparation process is simple to operate.

摘要：【中文】本发明提供的碳化硅陶瓷基复合材料的制备方法，对碳纤维表面进行氧化处理，采用硅烷偶联剂接枝法在所述碳纤维表面接枝碳化硅纳米粒子，使聚碳硅烷先驱体溶液在接枝碳化硅纳米粒子后的碳纤维表面浸渍、固化及高温裂解形成碳纤维增强碳化硅陶瓷基复合材料。上述碳化硅陶瓷基复合材料采用硅烷偶联剂接枝法制备了碳化硅纳米粒子接枝碳纤维，增强了纤维增强体与基体之间的润湿性，使纤维与基体之间具有合适的界面结合强度，保证了陶瓷基体与纤维增强体之间载荷的有效传递，同时一定程度上保护了纤维免受物理和化学的损伤。 【EN】According to the preparation method of the silicon carbide ceramic-based composite material, the surface of carbon fiber is subjected to oxidation treatment, silicon carbide nano particles are grafted on the surface of the carbon fiber by adopting a silane coupling agent grafting method, and a polycarbosilane precursor solution is impregnated, cured and pyrolyzed on the surface of the carbon fiber after the silicon carbide nano particles are grafted, so that the carbon fiber reinforced silicon carbide ceramic-based composite material is formed. The silicon carbide ceramic matrix composite material adopts a silane coupling agent grafting method to prepare the silicon carbide nano particle grafted carbon fiber, so that the wettability between the fiber reinforcement and the matrix is enhanced, the fiber and the matrix have proper interface bonding strength, the effective transmission of load between the ceramic matrix and the fiber reinforcement is ensured, and the fiber is protected from physical and chemical damages to a certain extent.