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Compact thermal shock resistant gradient ceramic coating and preparation method thereof
The invention belongs to the technical field of ceramic coating materials, and particularly relates to a compact thermal-shock-resistant gradient ceramic coating and a preparation method thereof.The compact thermal-shock-resistant gradient ceramic coating is composed of a porous silicon-based ceramic matrix and a compact ceramic coating body coating the surface of the porous silicon-based ceramic matrix; the compact ceramic coating is of a multi-layer structure, the difference of thermal expansion coefficients of all layers of compact ceramic coatings from the bottom of the compact ceramic coating to the surface of the compact ceramic coating is smaller than 10%, Young modulus is gradually decreased layer by layer, and the gradient ceramic coating is formed. The obtained coating is of a multi-layer ceramic coating structure with the modulus gradient increasing from the surface to the interior, and instability and expansion of cracks caused by thermal shock in the coating are inhibited, so that the structural stability of the coating is improved.
本发明属于陶瓷涂层材料技术领域，具体为一种致密抗热震梯度陶瓷涂层及其制备方法，一种致密抗热震梯度陶瓷涂层，所述梯度陶瓷涂层由多孔硅基陶瓷基体和涂覆于其表面的致密陶瓷涂层构成；所述致密陶瓷涂层为多层结构，由致密陶瓷涂层底部至表面的各层致密陶瓷涂层的热膨胀系数差异＜10％、杨氏模量逐层递减而形成所述梯度陶瓷涂层。获得的涂层由表面到内部模量梯度增加的多层陶瓷涂层结构，抑制热震引发的裂纹在涂层内部失稳扩展，以提升涂层的结构稳定性。
Compact thermal shock resistant gradient ceramic coating and preparation method thereof
The invention belongs to the technical field of ceramic coating materials, and particularly relates to a compact thermal-shock-resistant gradient ceramic coating and a preparation method thereof.The compact thermal-shock-resistant gradient ceramic coating is composed of a porous silicon-based ceramic matrix and a compact ceramic coating body coating the surface of the porous silicon-based ceramic matrix; the compact ceramic coating is of a multi-layer structure, the difference of thermal expansion coefficients of all layers of compact ceramic coatings from the bottom of the compact ceramic coating to the surface of the compact ceramic coating is smaller than 10%, Young modulus is gradually decreased layer by layer, and the gradient ceramic coating is formed. The obtained coating is of a multi-layer ceramic coating structure with the modulus gradient increasing from the surface to the interior, and instability and expansion of cracks caused by thermal shock in the coating are inhibited, so that the structural stability of the coating is improved.
本发明属于陶瓷涂层材料技术领域，具体为一种致密抗热震梯度陶瓷涂层及其制备方法，一种致密抗热震梯度陶瓷涂层，所述梯度陶瓷涂层由多孔硅基陶瓷基体和涂覆于其表面的致密陶瓷涂层构成；所述致密陶瓷涂层为多层结构，由致密陶瓷涂层底部至表面的各层致密陶瓷涂层的热膨胀系数差异＜10％、杨氏模量逐层递减而形成所述梯度陶瓷涂层。获得的涂层由表面到内部模量梯度增加的多层陶瓷涂层结构，抑制热震引发的裂纹在涂层内部失稳扩展，以提升涂层的结构稳定性。
Compact thermal shock resistant gradient ceramic coating and preparation method thereof
一种致密抗热震梯度陶瓷涂层及其制备方法
FAN XINGYU (author) / LI YANG (author) / ZHOU CHANCHAN (author) / YANG ZHOU (author) / ZHANG YUTING (author)
2024-03-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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