Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-entropy rare earth silicate ceramic coating material and preparation method thereof
The invention relates to a high-entropy rare earth silicate ceramic coating material and a preparation method thereof, and belongs to the technical field of high-entropy ceramic materials. The phase composition of the coating material is A2Si2O7, A is Yb < 0.1 > Lu < 0.1 > Ho < x > Y < 0.1 > Sc < 0.7-x > or Yb < 0.2 > Lu < 0.2 > Ho < 0.2 > Y < 0.2 > Sc < 0.2 >, and x is equal to 0.1 or 0.6. The preparation method comprises the following steps: uniformly mixing raw material powder through wet ball milling to form slurry; and then drying, raising the temperature to 1400-1500 DEG C, and calcining for 6-10 hours at a constant temperature to obtain the coating material. According to the coating material, by controlling different values of x, the purpose of regulating and controlling the thermal expansion coefficient can be achieved, and the five rare earth elements have the same molar ratio and are evenly distributed. The coating material has extremely low thermal conductivity and has a thermal expansion coefficient matched with a silicon carbide matrix, the thermal expansion coefficient can be effectively regulated and controlled, the service temperature of ultrahigh-temperature ceramic is increased, and the service life of the coating is prolonged.
本发明涉及一种高熵稀土硅酸盐陶瓷涂层材料及其制备方法，属于高熵陶瓷材料技术领域。所述涂层材料的物相组成为A2Si2O7，A为Yb0.1Lu0.1HoxY0.1Sc0.7‑x或Yb0.2Lu0.2Ho0.2Y0.2Sc0.2，x＝0.1或0.6。所述制备方法通过将原料粉体湿法球磨混合均匀，形成浆料；然后干燥，再升温至1400℃～1500℃恒温煅烧6h～10h，制得所述涂层材料。所述涂层材料通过控制x的不同取值，可达到调控热膨胀系数的目的，五种稀土元素具有相等的摩尔比，且分布均匀。所述涂层材料具有极低的热导率，具有与碳化硅基体相匹配的热膨胀系数，可实现热膨胀系数的有效调控，提高超高温陶瓷服役温度，提升涂层的使用寿命。
High-entropy rare earth silicate ceramic coating material and preparation method thereof
The invention relates to a high-entropy rare earth silicate ceramic coating material and a preparation method thereof, and belongs to the technical field of high-entropy ceramic materials. The phase composition of the coating material is A2Si2O7, A is Yb < 0.1 > Lu < 0.1 > Ho < x > Y < 0.1 > Sc < 0.7-x > or Yb < 0.2 > Lu < 0.2 > Ho < 0.2 > Y < 0.2 > Sc < 0.2 >, and x is equal to 0.1 or 0.6. The preparation method comprises the following steps: uniformly mixing raw material powder through wet ball milling to form slurry; and then drying, raising the temperature to 1400-1500 DEG C, and calcining for 6-10 hours at a constant temperature to obtain the coating material. According to the coating material, by controlling different values of x, the purpose of regulating and controlling the thermal expansion coefficient can be achieved, and the five rare earth elements have the same molar ratio and are evenly distributed. The coating material has extremely low thermal conductivity and has a thermal expansion coefficient matched with a silicon carbide matrix, the thermal expansion coefficient can be effectively regulated and controlled, the service temperature of ultrahigh-temperature ceramic is increased, and the service life of the coating is prolonged.
本发明涉及一种高熵稀土硅酸盐陶瓷涂层材料及其制备方法，属于高熵陶瓷材料技术领域。所述涂层材料的物相组成为A2Si2O7，A为Yb0.1Lu0.1HoxY0.1Sc0.7‑x或Yb0.2Lu0.2Ho0.2Y0.2Sc0.2，x＝0.1或0.6。所述制备方法通过将原料粉体湿法球磨混合均匀，形成浆料；然后干燥，再升温至1400℃～1500℃恒温煅烧6h～10h，制得所述涂层材料。所述涂层材料通过控制x的不同取值，可达到调控热膨胀系数的目的，五种稀土元素具有相等的摩尔比，且分布均匀。所述涂层材料具有极低的热导率，具有与碳化硅基体相匹配的热膨胀系数，可实现热膨胀系数的有效调控，提高超高温陶瓷服役温度，提升涂层的使用寿命。
High-entropy rare earth silicate ceramic coating material and preparation method thereof
一种高熵稀土硅酸盐陶瓷涂层材料及其制备方法
WANG YUHAN (Autor:in) / ZHU JINPENG (Autor:in) / YANG KAIJUN (Autor:in) / ZHANG YANING (Autor:in) / TIAN JINYU (Autor:in) / WANG HAILONG (Autor:in) / HE JILIN (Autor:in)
12.01.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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