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A platform for research: civil engineering, architecture and urbanism
Hafnium silicate environment barrier coating for ceramic-based composite material matrix and preparation method thereof
The invention provides a hafnium silicate environment barrier coating for a ceramic-based composite material matrix and a preparation method thereof. The preparation method comprises the following steps: (1) mixing HfO2 and SiO2, carrying out wet mixing and ball milling on a ball mill, drying, grinding, sieving, sintering, and carrying out a high-temperature solid-phase reaction; (2) after the high-temperature solid-phase reaction is finished, adding deionized water for slurry preparation, then performing ball milling, and performing spray granulation to obtain an HfSiO4 powder material; (3) firstly spraying a Si layer on the surface of a ceramic-based composite matrix as a priming coat, and then spraying the HfSiO4 powder material on the surface of the priming coat as a surface layer to form a multi-layer coating; and (4) carrying out a heat treatment on the multi-layer coating to obtain the environmental barrier coating. Due to the added heat treatment, the crystallinity of the HfSiO4 surface layer is improved, the binding force of each layer of the coating is better, the stability is higher, and the water and oxygen resistance of the environment barrier coating is greatly improved. The provided preparation method is simple and easy to control, and is easy for industrial production and application.
本发明提供了一种用于陶瓷基复合材料基体的硅酸铪环境障涂层及其制备方法。步骤如下：(1)将HfO和SiO混合，在球磨机上湿混球磨，经干燥、研磨、过筛，然后烧结进行高温固相反应；(2)待高温固相反应结束后，加入去离子水进行配浆，然后球磨，再经喷雾造粒制得HfSiO粉体材料；(3)在陶瓷基复合材料基体表面先喷涂一层Si层作为打底层，然后将HfSiO粉体材料喷涂在打底层表面作为面层，形成多层涂层；(4)对多层涂层进行热处理即得环境障涂层。本发明增加了热处理工艺，使得HfSiO面层结晶度提高，涂层各层结合力更好，稳定性更高，环境障涂层的抗水氧能力得到了大幅度提高。本发明提供的制备方法简单易控，易于工业化生产和应用。
Hafnium silicate environment barrier coating for ceramic-based composite material matrix and preparation method thereof
The invention provides a hafnium silicate environment barrier coating for a ceramic-based composite material matrix and a preparation method thereof. The preparation method comprises the following steps: (1) mixing HfO2 and SiO2, carrying out wet mixing and ball milling on a ball mill, drying, grinding, sieving, sintering, and carrying out a high-temperature solid-phase reaction; (2) after the high-temperature solid-phase reaction is finished, adding deionized water for slurry preparation, then performing ball milling, and performing spray granulation to obtain an HfSiO4 powder material; (3) firstly spraying a Si layer on the surface of a ceramic-based composite matrix as a priming coat, and then spraying the HfSiO4 powder material on the surface of the priming coat as a surface layer to form a multi-layer coating; and (4) carrying out a heat treatment on the multi-layer coating to obtain the environmental barrier coating. Due to the added heat treatment, the crystallinity of the HfSiO4 surface layer is improved, the binding force of each layer of the coating is better, the stability is higher, and the water and oxygen resistance of the environment barrier coating is greatly improved. The provided preparation method is simple and easy to control, and is easy for industrial production and application.
本发明提供了一种用于陶瓷基复合材料基体的硅酸铪环境障涂层及其制备方法。步骤如下：(1)将HfO和SiO混合，在球磨机上湿混球磨，经干燥、研磨、过筛，然后烧结进行高温固相反应；(2)待高温固相反应结束后，加入去离子水进行配浆，然后球磨，再经喷雾造粒制得HfSiO粉体材料；(3)在陶瓷基复合材料基体表面先喷涂一层Si层作为打底层，然后将HfSiO粉体材料喷涂在打底层表面作为面层，形成多层涂层；(4)对多层涂层进行热处理即得环境障涂层。本发明增加了热处理工艺，使得HfSiO面层结晶度提高，涂层各层结合力更好，稳定性更高，环境障涂层的抗水氧能力得到了大幅度提高。本发明提供的制备方法简单易控，易于工业化生产和应用。
Hafnium silicate environment barrier coating for ceramic-based composite material matrix and preparation method thereof
一种用于陶瓷基复合材料基体的硅酸铪环境障涂层及其制备方法
DONG SHUJUAN (author) / WANG YIHUI (author) / CAO XUEQIANG (author) / JIANG JIANING (author) / DENG LONGHUI (author) / ZHOU XIN (author)
2020-06-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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