Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Antioxidant and long-life environmental barrier coating bonding layer and preparation method thereof
The invention discloses an anti-oxidation and long-life environmental barrier coating bonding layer and a preparation method thereof, and belongs to the technical field of coatings. The environment barrier bonding layer is of a double-phase structure and is divided into an initial state and a heat treatment state, HfO2 with the thermal expansion coefficient similar to that of SiC is added into a traditional Si-based phase, the HfO2 is discretely distributed in the continuous and compact Si-based phase and can react with an oxidation product of Si to form HfSiO4 particles with excellent water and oxygen corrosion resistance and high toughness, meanwhile, coating heat treatment is carried out, and the heat resistance of the coating is greatly improved. According to the preparation method, HfSiO4 particles are dispersed in the SiO2 film, so that a layer of SiO2 film is formed on the surface of the coating, the oxygen vacancy concentration and the diffusion coefficient in HfO2 are reduced, the HfSiO4 particles are dispersed in the SiO2 film, phase change stress is accommodated, crack propagation is prevented, the service life of the coating is further prolonged, and oxidation resistance and long-life service of the novel bonding layer are achieved.
本发明公开了一种抗氧化、长寿命环境障涂层粘接层及其制备方法，属于涂层技术领域。该环境障粘接层为双相结构，分为初始态和热处理态，在传统的Si基相中，加入与SiC热膨胀系数相近的HfO2，HfO2离散分布在连续致密的Si基相中，能够与Si的氧化产物反应，形成具有优良抗水氧腐蚀和高韧性的HfSiO4颗粒，同时进行涂层热处理，在涂层表面形成一层SiO2薄膜，降低HfO2中的氧空位浓度和扩散系数，HfSiO4颗粒弥散分布SiO2薄膜内部，容纳相变应力、阻止裂纹扩展，进一步提升了其服役寿命，实现了新型粘接层的抗氧化和长寿命服役。
Antioxidant and long-life environmental barrier coating bonding layer and preparation method thereof
The invention discloses an anti-oxidation and long-life environmental barrier coating bonding layer and a preparation method thereof, and belongs to the technical field of coatings. The environment barrier bonding layer is of a double-phase structure and is divided into an initial state and a heat treatment state, HfO2 with the thermal expansion coefficient similar to that of SiC is added into a traditional Si-based phase, the HfO2 is discretely distributed in the continuous and compact Si-based phase and can react with an oxidation product of Si to form HfSiO4 particles with excellent water and oxygen corrosion resistance and high toughness, meanwhile, coating heat treatment is carried out, and the heat resistance of the coating is greatly improved. According to the preparation method, HfSiO4 particles are dispersed in the SiO2 film, so that a layer of SiO2 film is formed on the surface of the coating, the oxygen vacancy concentration and the diffusion coefficient in HfO2 are reduced, the HfSiO4 particles are dispersed in the SiO2 film, phase change stress is accommodated, crack propagation is prevented, the service life of the coating is further prolonged, and oxidation resistance and long-life service of the novel bonding layer are achieved.
本发明公开了一种抗氧化、长寿命环境障涂层粘接层及其制备方法，属于涂层技术领域。该环境障粘接层为双相结构，分为初始态和热处理态，在传统的Si基相中，加入与SiC热膨胀系数相近的HfO2，HfO2离散分布在连续致密的Si基相中，能够与Si的氧化产物反应，形成具有优良抗水氧腐蚀和高韧性的HfSiO4颗粒，同时进行涂层热处理，在涂层表面形成一层SiO2薄膜，降低HfO2中的氧空位浓度和扩散系数，HfSiO4颗粒弥散分布SiO2薄膜内部，容纳相变应力、阻止裂纹扩展，进一步提升了其服役寿命，实现了新型粘接层的抗氧化和长寿命服役。
Antioxidant and long-life environmental barrier coating bonding layer and preparation method thereof
一种抗氧化、长寿命环境障涂层粘接层及其制备方法
CHEN LIN (Autor:in) / YANG GUANJUN (Autor:in) / LI GUANGRONG (Autor:in) / LI SHUWEN (Autor:in)
16.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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