Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material as well as preparation method and application thereof
The invention relates to the field of aero-engine hot end component surface thermal barrier/environmental barrier coating materials, and particularly discloses a low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material as well as a preparation method and application of the low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material. The preparation method comprises the following steps: firstly, carrying out wet ball-milling and mixing on Dy2O3, Ho2O3, Er2O3, Tm2O3, Lu2O3 and HfO2 powder raw materials according to a ratio, then synthesizing high-entropy hafnate powder through a high-temperature solid-phase reaction method, and carrying out dry pressing molding and high-temperature sintering to obtain the high-entropy hafnate compact ceramic material. The low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material provided by the invention is a defective fluorite phase, has the characteristics of low thermal conductivity, low thermal expansion coefficient, extremely high CMAS corrosion resistance and the like, and can be used as a thermal barrier coating material on the surface of a ceramic-based composite component at the hot end of an aero-engine.
本发明涉及航空发动机热端构件表面热障/环境障涂层材料领域，具体公开了一种低热导‑低热膨胀、抗CMAS腐蚀高熵铪酸盐陶瓷材料及其制备方法与应用。本发明首先以Dy2O3，Ho2O3，Er2O3，Tm2O3，Lu2O3以及HfO2粉末原料按照配比湿法球磨混合，随后通过高温固相反应法合成高熵铪酸盐粉体，并通过干压成型以及高温烧结获得高熵铪酸盐致密陶瓷材料。本发明提供低热导‑低热膨胀、抗CMAS腐蚀高熵铪酸盐陶瓷材料为缺陷萤石相，其热导率低，热膨胀系数低以及抗CMAS腐蚀性能极强等特性，可用于航空发动机热端陶瓷基复合材料构件表面的热障涂层材料。
Low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material as well as preparation method and application thereof
The invention relates to the field of aero-engine hot end component surface thermal barrier/environmental barrier coating materials, and particularly discloses a low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material as well as a preparation method and application of the low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material. The preparation method comprises the following steps: firstly, carrying out wet ball-milling and mixing on Dy2O3, Ho2O3, Er2O3, Tm2O3, Lu2O3 and HfO2 powder raw materials according to a ratio, then synthesizing high-entropy hafnate powder through a high-temperature solid-phase reaction method, and carrying out dry pressing molding and high-temperature sintering to obtain the high-entropy hafnate compact ceramic material. The low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material provided by the invention is a defective fluorite phase, has the characteristics of low thermal conductivity, low thermal expansion coefficient, extremely high CMAS corrosion resistance and the like, and can be used as a thermal barrier coating material on the surface of a ceramic-based composite component at the hot end of an aero-engine.
本发明涉及航空发动机热端构件表面热障/环境障涂层材料领域，具体公开了一种低热导‑低热膨胀、抗CMAS腐蚀高熵铪酸盐陶瓷材料及其制备方法与应用。本发明首先以Dy2O3，Ho2O3，Er2O3，Tm2O3，Lu2O3以及HfO2粉末原料按照配比湿法球磨混合，随后通过高温固相反应法合成高熵铪酸盐粉体，并通过干压成型以及高温烧结获得高熵铪酸盐致密陶瓷材料。本发明提供低热导‑低热膨胀、抗CMAS腐蚀高熵铪酸盐陶瓷材料为缺陷萤石相，其热导率低，热膨胀系数低以及抗CMAS腐蚀性能极强等特性，可用于航空发动机热端陶瓷基复合材料构件表面的热障涂层材料。
Low-thermal-conductivity-low-thermal-expansion CMAS-corrosion-resistant high-entropy hafnate ceramic material as well as preparation method and application thereof
一种低热导-低热膨胀、抗CMAS腐蚀高熵铪酸盐陶瓷材料及其制备方法与应用
MIAO QIANG (Autor:in) / ZHAO HUI (Autor:in) / LIANG WENPING (Autor:in) / LIU RUIXIANG (Autor:in) / YAN RONGXUE (Autor:in) / ZHANG MENG (Autor:in) / DONG MEIJING (Autor:in) / WU YUTING (Autor:in) / ZANG KAI (Autor:in) / JIA FEILONG (Autor:in)
12.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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