Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Self-healing high-density environmental barrier coating as well as preparation method and application thereof
The invention discloses a self-healing high-density environmental barrier coating as well as a preparation method and application thereof, and belongs to the technical field of environmental barrier coatings. The preparation method of the environmental barrier coating comprises the following steps: preparing a rare earth silicate ceramic coating on the surface of a ceramic-based composite material matrix by adopting a plasma spraying-physical vapor deposition mode; then annealing treatment is carried out; the annealing treatment mode comprises high-temperature furnace annealing treatment or plasma gun in-situ scanning heat treatment. The plasma spraying-physical vapor deposition mode can reduce the residual stress of the coating, is beneficial to preparation of a high-density environmental barrier coating, and is combined with specific annealing treatment, so that the coating can generate phase change expansion and sintering, and self-healing of through cracks in a spraying state is promoted. The method is simple and easy to implement, the problem of through cracks is solved while the porosity is reduced, the porosity of the prepared coating is not higher than 5%, the coating does not contain through cracks, the coating is used for preparing gas turbine ceramic-based hot end components, the water oxygen corrosion resistance of the corresponding components is improved, and the service life of the corresponding components is prolonged.
本发明公开了一种自愈合高致密环境障涂层及其制备方法与应用，属于环境障涂层技术领域。该环境障涂层的制备包括：采用等离子喷涂‑物理气相沉积方式于陶瓷基复合材料基体的表面制备稀土硅酸盐陶瓷涂层；随后进行退火处理；退火处理方式包括高温炉退火处理或等离子喷枪原位扫描热处理。等离子喷涂‑物理气相沉积方式可降低涂层残余应力，有利于制备高致密环境障涂层，结合特定的退火处理，可使涂层发生相变膨胀与烧结，促进喷涂态贯穿裂纹自愈合。该方法简单易行，在降低孔隙率的同时克服了贯穿裂纹问题，由此制备得到的涂层孔隙率不高于5％且不含贯穿裂纹，将其用于制备燃气轮机陶瓷基热端部件，有利于提高相应部件的抗水氧腐蚀性能与服役寿命。
Self-healing high-density environmental barrier coating as well as preparation method and application thereof
The invention discloses a self-healing high-density environmental barrier coating as well as a preparation method and application thereof, and belongs to the technical field of environmental barrier coatings. The preparation method of the environmental barrier coating comprises the following steps: preparing a rare earth silicate ceramic coating on the surface of a ceramic-based composite material matrix by adopting a plasma spraying-physical vapor deposition mode; then annealing treatment is carried out; the annealing treatment mode comprises high-temperature furnace annealing treatment or plasma gun in-situ scanning heat treatment. The plasma spraying-physical vapor deposition mode can reduce the residual stress of the coating, is beneficial to preparation of a high-density environmental barrier coating, and is combined with specific annealing treatment, so that the coating can generate phase change expansion and sintering, and self-healing of through cracks in a spraying state is promoted. The method is simple and easy to implement, the problem of through cracks is solved while the porosity is reduced, the porosity of the prepared coating is not higher than 5%, the coating does not contain through cracks, the coating is used for preparing gas turbine ceramic-based hot end components, the water oxygen corrosion resistance of the corresponding components is improved, and the service life of the corresponding components is prolonged.
本发明公开了一种自愈合高致密环境障涂层及其制备方法与应用，属于环境障涂层技术领域。该环境障涂层的制备包括：采用等离子喷涂‑物理气相沉积方式于陶瓷基复合材料基体的表面制备稀土硅酸盐陶瓷涂层；随后进行退火处理；退火处理方式包括高温炉退火处理或等离子喷枪原位扫描热处理。等离子喷涂‑物理气相沉积方式可降低涂层残余应力，有利于制备高致密环境障涂层，结合特定的退火处理，可使涂层发生相变膨胀与烧结，促进喷涂态贯穿裂纹自愈合。该方法简单易行，在降低孔隙率的同时克服了贯穿裂纹问题，由此制备得到的涂层孔隙率不高于5％且不含贯穿裂纹，将其用于制备燃气轮机陶瓷基热端部件，有利于提高相应部件的抗水氧腐蚀性能与服役寿命。
Self-healing high-density environmental barrier coating as well as preparation method and application thereof
一种自愈合高致密环境障涂层及其制备方法与应用
LYU BOWEN (Autor:in) / WANG CHAO (Autor:in) / WU JIAN (Autor:in) / DENG ZIQIAN (Autor:in) / ZHANG XIAOFENG (Autor:in) / MAO JIE (Autor:in) / DENG CHUNMING (Autor:in) / DENG CHANGGUANG (Autor:in) / LIU MIN (Autor:in)
05.04.2022
Patent
Elektronische Ressource
Chinesisch
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