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Environmental barrier coating for SiCf/SiC ceramic-based composite material and preparation method
The invention discloses an environmental barrier coating for a SiCf/SiC ceramic matrix composite and a preparation method, the environmental barrier coating is composed of a Si bonding layer and a Yb2Si2O7 surface layer, a matrix and the Si bonding layer are in plane contact, and the Si bonding layer and the Yb2Si2O7 surface layer are in wave-shaped surface contact. The wavy structure can increase the contact area and enhance the bonding strength of the Si/Yb2Si2O7 interface, so that the deformation and damage of the structure are reduced. The middle of the Yb2Si2O7 surface layer adopts a net structure, and two ends adopt solid structures. The net-shaped structure can effectively disperse and bear external stress, excellent structural strength is provided, meanwhile, the use amount of materials is reduced, and lightweight design is achieved; the solid structures are adopted at the two ends, so that the environmental barrier coating is prevented from losing efficacy due to diffusion of a corrosive medium, and an effective surface protection effect can be provided for the SiC ceramic-based composite material. When the bonding layer and the surface layer are prepared, a plasma spray gun needs to spray according to a set path due to a wave-shaped structure at the interface, and meanwhile, a net-shaped structure is formed in the middle of the surface layer.
本发明公开了一种用于SiCf/SiC陶瓷基复合材料的环境障涂层及制备方法，该环境障涂层由Si粘结层和Yb2Si2O7面层组成，基体与Si粘结层采用平面接触，Si粘结层和Yb2Si2O7面层采用波浪形面接触。波浪形结构能够增大接触面积，增强Si/Yb2Si2O7界面的粘结强度，从而减少结构的变形和破坏。Yb2Si2O7面层中间采用网状结构，两端采用实体结构。网状结构能够有效地分散和承受外部应力，提供优异的结构强度，同时减少材料的使用量，实现轻量化设计；两端采用实体结构是为了防止因腐蚀介质的扩散而使环境障涂层失效，可为SiC陶瓷基复合材料提供有效的表面防护效果。在制备粘接层和面层时，由于其界面处波浪形结构，等离子喷枪需按设定路径喷涂，同时面层中间形成网状结构。
Environmental barrier coating for SiCf/SiC ceramic-based composite material and preparation method
The invention discloses an environmental barrier coating for a SiCf/SiC ceramic matrix composite and a preparation method, the environmental barrier coating is composed of a Si bonding layer and a Yb2Si2O7 surface layer, a matrix and the Si bonding layer are in plane contact, and the Si bonding layer and the Yb2Si2O7 surface layer are in wave-shaped surface contact. The wavy structure can increase the contact area and enhance the bonding strength of the Si/Yb2Si2O7 interface, so that the deformation and damage of the structure are reduced. The middle of the Yb2Si2O7 surface layer adopts a net structure, and two ends adopt solid structures. The net-shaped structure can effectively disperse and bear external stress, excellent structural strength is provided, meanwhile, the use amount of materials is reduced, and lightweight design is achieved; the solid structures are adopted at the two ends, so that the environmental barrier coating is prevented from losing efficacy due to diffusion of a corrosive medium, and an effective surface protection effect can be provided for the SiC ceramic-based composite material. When the bonding layer and the surface layer are prepared, a plasma spray gun needs to spray according to a set path due to a wave-shaped structure at the interface, and meanwhile, a net-shaped structure is formed in the middle of the surface layer.
本发明公开了一种用于SiCf/SiC陶瓷基复合材料的环境障涂层及制备方法，该环境障涂层由Si粘结层和Yb2Si2O7面层组成，基体与Si粘结层采用平面接触，Si粘结层和Yb2Si2O7面层采用波浪形面接触。波浪形结构能够增大接触面积，增强Si/Yb2Si2O7界面的粘结强度，从而减少结构的变形和破坏。Yb2Si2O7面层中间采用网状结构，两端采用实体结构。网状结构能够有效地分散和承受外部应力，提供优异的结构强度，同时减少材料的使用量，实现轻量化设计；两端采用实体结构是为了防止因腐蚀介质的扩散而使环境障涂层失效，可为SiC陶瓷基复合材料提供有效的表面防护效果。在制备粘接层和面层时，由于其界面处波浪形结构，等离子喷枪需按设定路径喷涂，同时面层中间形成网状结构。
Environmental barrier coating for SiCf/SiC ceramic-based composite material and preparation method
一种用于SiCf/SiC陶瓷基复合材料的环境障涂层及制备方法
JIN XIAOCHAO (author) / MA RONG (author) / GAO XIAOLONG (author) / HOU CHENG (author) / YANG JINGJING (author) / ZHOU ZIYANG (author) / FAN XUELING (author)
2024-03-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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