Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Environmental barrier coating for ceramic-based composite material and preparation method of environmental barrier coating
The invention relates to the technical field of thermal protection coating materials, and discloses an environmental barrier coating for a ceramic-based composite material and a preparation method of the environmental barrier coating. The preparation method of the environmental barrier coating for the ceramic-based composite material comprises the following steps: adding high-entropy rare earth microcrystalline glass powder into a dispersing agent, then adding a sintering aid and a binder, and mixing and stirring to obtain environmental barrier coating slurry; uniformly coating a CMC base material with the environmental barrier coating slurry, and heating at 60-80 DEG C to remove the dispersing agent so as to obtain a pretreated CMC base material; and heating the pretreated CMC base material to 1500-1600 DEG C, and carrying out heat preservation to obtain the environmental barrier coating. The preparation method is low in cost and simple and controllable in process, corrosion-resistant high-entropy rare earth disilicate (5RE0.2) 2Si2O7 crystals and mullite crystals with high chemical tolerance are obtained through in-situ devitrification of high-entropy rare earth aluminosilicate glass ceramics at high temperature, meanwhile, a small amount of residual glass phase can enhance the bonding strength of a coating and a matrix, a Si bonding layer is not needed, and the preparation method is suitable for large-scale production. The single-layer environmental barrier coating resistant to 1500 DEG C corrosion can be prepared.
本申请涉及热防护涂层材料技术领域，公开了一种用于陶瓷基复合材料的环境障涂层及其制备方法。用于陶瓷基复合材料的环境障涂层的制备方法，包括：将高熵稀土微晶玻璃粉加入分散剂中，再加入烧结助剂与粘结剂，混合搅拌得到环境障涂层浆料；将环境障涂层浆料均匀涂覆在CMC基体材料上，在60～80℃加热去除分散剂，得到预处理CMC基体材料；将预处理CMC基体材料加热至1500‑1600℃并保温，得到环境障涂层。本申请的制备方法成本低，工艺简单可控，通过高熵稀土铝硅酸盐微晶玻璃在高温下原位析晶，得到耐腐蚀的高熵稀土二硅酸盐(5RE0.2)2Si2O7晶体和化学容限高的莫来石晶体，同时少量残余玻璃相还可以增强涂层和基体的结合强度，无需Si粘结层，即可制备耐1500℃腐蚀的单层环境障涂层。
Environmental barrier coating for ceramic-based composite material and preparation method of environmental barrier coating
The invention relates to the technical field of thermal protection coating materials, and discloses an environmental barrier coating for a ceramic-based composite material and a preparation method of the environmental barrier coating. The preparation method of the environmental barrier coating for the ceramic-based composite material comprises the following steps: adding high-entropy rare earth microcrystalline glass powder into a dispersing agent, then adding a sintering aid and a binder, and mixing and stirring to obtain environmental barrier coating slurry; uniformly coating a CMC base material with the environmental barrier coating slurry, and heating at 60-80 DEG C to remove the dispersing agent so as to obtain a pretreated CMC base material; and heating the pretreated CMC base material to 1500-1600 DEG C, and carrying out heat preservation to obtain the environmental barrier coating. The preparation method is low in cost and simple and controllable in process, corrosion-resistant high-entropy rare earth disilicate (5RE0.2) 2Si2O7 crystals and mullite crystals with high chemical tolerance are obtained through in-situ devitrification of high-entropy rare earth aluminosilicate glass ceramics at high temperature, meanwhile, a small amount of residual glass phase can enhance the bonding strength of a coating and a matrix, a Si bonding layer is not needed, and the preparation method is suitable for large-scale production. The single-layer environmental barrier coating resistant to 1500 DEG C corrosion can be prepared.
本申请涉及热防护涂层材料技术领域，公开了一种用于陶瓷基复合材料的环境障涂层及其制备方法。用于陶瓷基复合材料的环境障涂层的制备方法，包括：将高熵稀土微晶玻璃粉加入分散剂中，再加入烧结助剂与粘结剂，混合搅拌得到环境障涂层浆料；将环境障涂层浆料均匀涂覆在CMC基体材料上，在60～80℃加热去除分散剂，得到预处理CMC基体材料；将预处理CMC基体材料加热至1500‑1600℃并保温，得到环境障涂层。本申请的制备方法成本低，工艺简单可控，通过高熵稀土铝硅酸盐微晶玻璃在高温下原位析晶，得到耐腐蚀的高熵稀土二硅酸盐(5RE0.2)2Si2O7晶体和化学容限高的莫来石晶体，同时少量残余玻璃相还可以增强涂层和基体的结合强度，无需Si粘结层，即可制备耐1500℃腐蚀的单层环境障涂层。
Environmental barrier coating for ceramic-based composite material and preparation method of environmental barrier coating
一种用于陶瓷基复合材料的环境障涂层及其制备方法
FAN SHANGWU (Autor:in) / MA YUJIE (Autor:in) / CUI YONGJING (Autor:in) / KOU SIJIE (Autor:in) / MENG XINYU (Autor:in) / GUO CHUN (Autor:in)
09.04.2024
Patent
Elektronische Ressource
Chinesisch
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