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Method for preparing exoskeleton structure fiber monolith zirconium carbide ceramic through wet spinning and co-extrusion
The invention provides a method for preparing exoskeleton structure fiber monolith zirconium carbide ceramic through wet spinning and co-extrusion. The method is characterized by comprising the following steps of: (1) adding a curing agent and a plasticizer into an organic solvent and stirring for dissolving the curing agent and the plasticizer, respectively adding ceramic powder of a fibrous monolith precursor cell and ceramic powder of a cell interface layer, uniformly stirring to form two spinneret slurries with different components, pouring the spinneret slurries into different injectors,and spraying the spinneret slurries into a gel tank through a co-extrusion spinneret under mechanical pressure to obtain an exoskeleton structure fibrous monolith precursor; (2) carrying out warm-pressing molding; (3) carrying out vacuum degreasing; and (4) carrying out hot pressing sintering to obtain the exoskeleton structure fiber monolith zirconium carbide ceramic, the fracture toughness of which can reach 8MPa. M<1/2> or above. According to the obtained exoskeleton structure fiber monolith zirconium carbide ceramic, the toughening mode in which strong and weak layers of a biomimetic material are alternately arranged is reserved, meanwhile, the three-dimensional communication structure of a weak material is changed, and the fracture toughness and the oxidation ablation resistance of the material are synergistically improved.
本发明提供一种湿纺共挤出制备外骨骼结构纤维独石碳化锆陶瓷，其特征在于采用以下步骤：1）先将固化剂和增塑剂加入有机溶剂中搅拌溶解，再分别加入纤维独石前驱体胞体和胞体界面层的陶瓷粉料、搅拌均匀，形成两种不同组分的喷丝料浆，倒入不同的注射器中，在机械压力下，通过共挤出喷丝头喷入凝胶槽中，即得外骨骼结构的纤维独石前驱体；2）温压成型；3）真空脱脂；4）热压烧结，即得外骨骼结构纤维独石碳化锆陶瓷，其断裂韧性可达8MPa•m1/2以上。本发明所得的外骨骼结构纤维独石碳化锆陶瓷，保留了仿生材料强弱层交替排列的增韧方式，同时，改变了弱质材料的三维联通结构，材料达到断裂韧性和抗氧化烧蚀性协同提高。
Method for preparing exoskeleton structure fiber monolith zirconium carbide ceramic through wet spinning and co-extrusion
The invention provides a method for preparing exoskeleton structure fiber monolith zirconium carbide ceramic through wet spinning and co-extrusion. The method is characterized by comprising the following steps of: (1) adding a curing agent and a plasticizer into an organic solvent and stirring for dissolving the curing agent and the plasticizer, respectively adding ceramic powder of a fibrous monolith precursor cell and ceramic powder of a cell interface layer, uniformly stirring to form two spinneret slurries with different components, pouring the spinneret slurries into different injectors,and spraying the spinneret slurries into a gel tank through a co-extrusion spinneret under mechanical pressure to obtain an exoskeleton structure fibrous monolith precursor; (2) carrying out warm-pressing molding; (3) carrying out vacuum degreasing; and (4) carrying out hot pressing sintering to obtain the exoskeleton structure fiber monolith zirconium carbide ceramic, the fracture toughness of which can reach 8MPa. M<1/2> or above. According to the obtained exoskeleton structure fiber monolith zirconium carbide ceramic, the toughening mode in which strong and weak layers of a biomimetic material are alternately arranged is reserved, meanwhile, the three-dimensional communication structure of a weak material is changed, and the fracture toughness and the oxidation ablation resistance of the material are synergistically improved.
本发明提供一种湿纺共挤出制备外骨骼结构纤维独石碳化锆陶瓷，其特征在于采用以下步骤：1）先将固化剂和增塑剂加入有机溶剂中搅拌溶解，再分别加入纤维独石前驱体胞体和胞体界面层的陶瓷粉料、搅拌均匀，形成两种不同组分的喷丝料浆，倒入不同的注射器中，在机械压力下，通过共挤出喷丝头喷入凝胶槽中，即得外骨骼结构的纤维独石前驱体；2）温压成型；3）真空脱脂；4）热压烧结，即得外骨骼结构纤维独石碳化锆陶瓷，其断裂韧性可达8MPa•m1/2以上。本发明所得的外骨骼结构纤维独石碳化锆陶瓷，保留了仿生材料强弱层交替排列的增韧方式，同时，改变了弱质材料的三维联通结构，材料达到断裂韧性和抗氧化烧蚀性协同提高。
Method for preparing exoskeleton structure fiber monolith zirconium carbide ceramic through wet spinning and co-extrusion
湿纺共挤出制备外骨骼结构纤维独石碳化锆陶瓷
LI SHUANG (Autor:in) / MENG FANTAO (Autor:in) / DONG SHUHUA (Autor:in)
30.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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