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Process for preparing weak interface fiber monolith hafnium boride ceramic by wet spinning and co-extrusion method
The invention provides a process for preparing weak interface fiber monolith hafnium boride ceramic by a wet spinning and co-extrusion method. The method is characterized by comprising the following steps of: (1) adding a curing agent and a plasticizer into an organic solvent, stirring for dissolving the curing agent and the plasticizer, respectively adding ceramic powder of a fibrous monolith precursor cell and ceramic powder of a fibrous monolith precursor interfacial layer, uniformly stirring to form two spinneret slurries with different components, spraying the spinneret slurries into a gel tank filled with water through a co-extrusion spinneret under mechanical pressure, and carrying out solidification molding to obtain a fibrous monolith precursor with an interfacial layer; (2) carrying out warm-pressing molding; (3) carrying out vacuum degreasing; and (4) carrying out hot-pressing sintering to obtain the weak interface fiber monolith hafnium boride ceramic, the fracture toughness of which can reach 9 MPa.m<1/2> or above. The process for forming the fibrous monolith precursor through the wet spinning co-extrusion method is simplified, mechanical arrangement is facilitated, the microstructure of the obtained fibrous monolith hafnium boride super-high-temperature ceramic is accurately controlled, the fracture mode is non-brittle fracture, and the performance is excellent.
本发明提供一种湿纺共挤出法制备弱界面纤维独石硼化铪陶瓷的工艺，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纤维独石前驱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，在机械压力下，通过共挤出喷丝头喷入盛满水的凝胶槽中，凝固成型，即得具有界面层的纤维独石前驱体；2）温压成型；3）真空脱脂；4）热压烧结，即得弱界面纤维独石硼化铪陶瓷，其断裂韧性可达9MPa·m1/2以上。本发明湿纺共挤出法成型纤维独石前驱体简化工艺，有利于机械排布，所得的纤维独石硼化铪超高温陶瓷，达到微观结构的精确控制，断裂方式为非脆性断裂，性能优良。
Process for preparing weak interface fiber monolith hafnium boride ceramic by wet spinning and co-extrusion method
The invention provides a process for preparing weak interface fiber monolith hafnium boride ceramic by a wet spinning and co-extrusion method. The method is characterized by comprising the following steps of: (1) adding a curing agent and a plasticizer into an organic solvent, stirring for dissolving the curing agent and the plasticizer, respectively adding ceramic powder of a fibrous monolith precursor cell and ceramic powder of a fibrous monolith precursor interfacial layer, uniformly stirring to form two spinneret slurries with different components, spraying the spinneret slurries into a gel tank filled with water through a co-extrusion spinneret under mechanical pressure, and carrying out solidification molding to obtain a fibrous monolith precursor with an interfacial layer; (2) carrying out warm-pressing molding; (3) carrying out vacuum degreasing; and (4) carrying out hot-pressing sintering to obtain the weak interface fiber monolith hafnium boride ceramic, the fracture toughness of which can reach 9 MPa.m<1/2> or above. The process for forming the fibrous monolith precursor through the wet spinning co-extrusion method is simplified, mechanical arrangement is facilitated, the microstructure of the obtained fibrous monolith hafnium boride super-high-temperature ceramic is accurately controlled, the fracture mode is non-brittle fracture, and the performance is excellent.
本发明提供一种湿纺共挤出法制备弱界面纤维独石硼化铪陶瓷的工艺，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纤维独石前驱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，在机械压力下，通过共挤出喷丝头喷入盛满水的凝胶槽中，凝固成型，即得具有界面层的纤维独石前驱体；2）温压成型；3）真空脱脂；4）热压烧结，即得弱界面纤维独石硼化铪陶瓷，其断裂韧性可达9MPa·m1/2以上。本发明湿纺共挤出法成型纤维独石前驱体简化工艺，有利于机械排布，所得的纤维独石硼化铪超高温陶瓷，达到微观结构的精确控制，断裂方式为非脆性断裂，性能优良。
Process for preparing weak interface fiber monolith hafnium boride ceramic by wet spinning and co-extrusion method
湿纺共挤出法制备弱界面纤维独石硼化铪陶瓷的工艺
WANG PENG (Autor:in) / ZHOU LIJUAN (Autor:in) / MENG FANTAO (Autor:in)
30.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
D01D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
,
Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
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D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
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