Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Environmental barrier coating as well as preparation method and application thereof
The invention provides an environmental barrier coating. The environmental barrier coating is composed of a SiC bonding layer, a mullite middle layer and an ytterbium silicate outer coating, which coat a C/SiC composite material and are sequentially arranged from inside to outside. The C/SiC composite material coated by a SiC coating is prepared by a secondary chemical vapor deposition (CVD) method; the mullite middle layer is prepared by combining a sol-gel method with an air spraying technology, and the ytterbium silicate outer coating is prepared by combining a solid phase sintering technology with an air spraying technology. Through a smart EBC coating system and a preparation process, the ytterbium silicate outer coating is prepared by combining a solid phase sintering technology withan air spraying technology for the first time, the mullite middle layer and the ytterbium silicate outer coating are tightly combined, and the coating is compact and free of cracks. The traditional sol-gel process is improved to a great extent, the defects of cracking, peeling and poor binding force in the sintering process of a coating prepared through a traditional sol-gel method are maximallyovercome, and the use requirements of large components and special-shaped parts can be met.
本发明提供的环境障碍涂层，由包覆在C/SiC复合材料上的由内向外依次设置的SiC粘结层、莫来石中间层和硅酸镱外涂层组成。该涂层采用二次化学气相沉积法制备得到SiC涂层包覆的C/SiC复合材料；溶胶‑凝胶结合空气喷涂工艺制备莫来石中间层，固体反应烧结+空气喷涂工艺制备硅酸镱外涂层。本发明通过巧妙的EBC涂层体系和制备工艺的设计，首次通过固相反应烧结结合空气喷涂工艺制备硅酸镱外涂层，使莫来石中间层和硅酸镱外涂层之间结合紧密，涂层致密无裂纹。对传统溶胶‑凝胶工艺做了很大程度上的改进，极大程度上避免了传统溶胶‑凝胶法制备涂层在烧结过程中开裂、剥落、结合力差的不足，能满足大型构件和异形件的使用。
Environmental barrier coating as well as preparation method and application thereof
The invention provides an environmental barrier coating. The environmental barrier coating is composed of a SiC bonding layer, a mullite middle layer and an ytterbium silicate outer coating, which coat a C/SiC composite material and are sequentially arranged from inside to outside. The C/SiC composite material coated by a SiC coating is prepared by a secondary chemical vapor deposition (CVD) method; the mullite middle layer is prepared by combining a sol-gel method with an air spraying technology, and the ytterbium silicate outer coating is prepared by combining a solid phase sintering technology with an air spraying technology. Through a smart EBC coating system and a preparation process, the ytterbium silicate outer coating is prepared by combining a solid phase sintering technology withan air spraying technology for the first time, the mullite middle layer and the ytterbium silicate outer coating are tightly combined, and the coating is compact and free of cracks. The traditional sol-gel process is improved to a great extent, the defects of cracking, peeling and poor binding force in the sintering process of a coating prepared through a traditional sol-gel method are maximallyovercome, and the use requirements of large components and special-shaped parts can be met.
本发明提供的环境障碍涂层，由包覆在C/SiC复合材料上的由内向外依次设置的SiC粘结层、莫来石中间层和硅酸镱外涂层组成。该涂层采用二次化学气相沉积法制备得到SiC涂层包覆的C/SiC复合材料；溶胶‑凝胶结合空气喷涂工艺制备莫来石中间层，固体反应烧结+空气喷涂工艺制备硅酸镱外涂层。本发明通过巧妙的EBC涂层体系和制备工艺的设计，首次通过固相反应烧结结合空气喷涂工艺制备硅酸镱外涂层，使莫来石中间层和硅酸镱外涂层之间结合紧密，涂层致密无裂纹。对传统溶胶‑凝胶工艺做了很大程度上的改进，极大程度上避免了传统溶胶‑凝胶法制备涂层在烧结过程中开裂、剥落、结合力差的不足，能满足大型构件和异形件的使用。
Environmental barrier coating as well as preparation method and application thereof
一种环境障碍涂层及其制备方法和应用
LI YANG (Autor:in) / CHEN PENGJU (Autor:in) / XIAO PENG (Autor:in) / LI ZHUAN (Autor:in)
05.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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