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Thermal shock resistant gradient composite coating on surface of silicon carbide-based composite material and preparation method of thermal shock resistant gradient composite coating
The invention discloses a thermal-shock-resistant gradient composite coating on the surface of a silicon carbide-based composite material and a preparation method thereof, and relates to the technical field of high-temperature protective coatings, the preparation method comprises the following steps: sequentially preparing n layers of silicon-doped tantalate aSi-b (DTa) (1-x) Si2xO4 on a fiber-reinforced silicon carbide-based composite material matrix to form a thermal-shock-resistant gradient composite coating system, a = 1-0, b = 0-1, and x = 0.01-0.09; the thicknesses of all the silicon-doped tantalate layers are sequentially increased from inside to outside, and the porosity is sequentially reduced. The gradient composite coating has stronger fracture toughness, higher bonding strength, lower thermal diffusion rate and more adaptive thermal expansion coefficient due to the intrinsic performance of the coating material and the structural design of the gradient coating, so that the composite coating has more excellent thermal shock resistance, the service life of the silicon carbide-based composite material is remarkably prolonged, and the service life of the silicon carbide-based composite material is prolonged. The coating is an advanced silicon carbide-based composite material surface high-temperature protective coating.
本发明公开了一种碳化硅基复合材料表面的抗热震梯度复合涂层及其制备方法，涉及高温防护涂层技术领域，包括在纤维增强碳化硅基复合材料基体上依次制备n层硅掺杂钽酸盐aSi‑b(DTa)1‑xSi2xO4形成抗热震梯度复合涂层体系，其中，a＝1～0,b＝0～1，x＝0.01～0.09；各硅掺杂钽酸盐层从内向外厚度依次增厚、孔隙率依次减小。本发明的梯度复合涂层由于涂层材料本征性能和梯度涂层结构设计从而拥有更强的断裂韧性，更高的结合强度、更低的热扩散速率、更适配的热膨胀系数，使该复合涂层具有更为优异的抗热震性能，显著提高碳化硅基复合材料服役寿命，是极为先进的碳化硅基复合材料表面高温防护涂层。
Thermal shock resistant gradient composite coating on surface of silicon carbide-based composite material and preparation method of thermal shock resistant gradient composite coating
The invention discloses a thermal-shock-resistant gradient composite coating on the surface of a silicon carbide-based composite material and a preparation method thereof, and relates to the technical field of high-temperature protective coatings, the preparation method comprises the following steps: sequentially preparing n layers of silicon-doped tantalate aSi-b (DTa) (1-x) Si2xO4 on a fiber-reinforced silicon carbide-based composite material matrix to form a thermal-shock-resistant gradient composite coating system, a = 1-0, b = 0-1, and x = 0.01-0.09; the thicknesses of all the silicon-doped tantalate layers are sequentially increased from inside to outside, and the porosity is sequentially reduced. The gradient composite coating has stronger fracture toughness, higher bonding strength, lower thermal diffusion rate and more adaptive thermal expansion coefficient due to the intrinsic performance of the coating material and the structural design of the gradient coating, so that the composite coating has more excellent thermal shock resistance, the service life of the silicon carbide-based composite material is remarkably prolonged, and the service life of the silicon carbide-based composite material is prolonged. The coating is an advanced silicon carbide-based composite material surface high-temperature protective coating.
本发明公开了一种碳化硅基复合材料表面的抗热震梯度复合涂层及其制备方法，涉及高温防护涂层技术领域，包括在纤维增强碳化硅基复合材料基体上依次制备n层硅掺杂钽酸盐aSi‑b(DTa)1‑xSi2xO4形成抗热震梯度复合涂层体系，其中，a＝1～0,b＝0～1，x＝0.01～0.09；各硅掺杂钽酸盐层从内向外厚度依次增厚、孔隙率依次减小。本发明的梯度复合涂层由于涂层材料本征性能和梯度涂层结构设计从而拥有更强的断裂韧性，更高的结合强度、更低的热扩散速率、更适配的热膨胀系数，使该复合涂层具有更为优异的抗热震性能，显著提高碳化硅基复合材料服役寿命，是极为先进的碳化硅基复合材料表面高温防护涂层。
Thermal shock resistant gradient composite coating on surface of silicon carbide-based composite material and preparation method of thermal shock resistant gradient composite coating
一种碳化硅基复合材料表面的抗热震梯度复合涂层及其制备方法
FENG JING (author) / ZHANG LUYANG (author) / CHEN LIN (author) / ZHANG DI (author) / YAN SHIXIAO (author) / LEE GUN-WOO (author) / XU BIN (author) / WANG MENG (author) / REN ZHIYI (author) / WANG JIANKUN (author)
2024-02-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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