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A platform for research: civil engineering, architecture and urbanism
High-toughness multiphase ceramic material as well as preparation method and application thereof
The invention provides a high-toughness multiphase ceramic material as well as a preparation method and application thereof. The high-toughness multiphase ceramic material comprises rare earth zirconate and rare earth aluminate with high Curie temperature, the rare earth aluminate is distributed in the rare earth zirconate, and the Curie temperature of the rare earth aluminate is not lower than 1000 DEG C. The rare earth aluminate contains a plurality of randomly oriented ferroelastic domains, when the stress applied by the outside is higher than the coercive force, the C axis of the ferroelastic domains tends to turn to the direction parallel to the external stress or perpendicular to the crack propagation direction, and the ferroelastic domains can effectively consume the crack propagation energy during turning. According to the high-toughness multiphase ceramic material provided by the invention, the rare earth aluminate with high Curie temperature is introduced into the rare earthzirconate matrix as a toughening phase, so that the prepared ceramic material still has high fracture toughness and low thermal conductivity at a high temperature of 1000 DEG C or above, and has a very wide application prospect as a thermal barrier coating.
本发明提供了一种高韧性复相陶瓷材料及其制备方法和应用，所述高韧性复相陶瓷材料，包括稀土锆酸盐和高居里温度的稀土铝酸盐，所述稀土铝酸盐分布于稀土锆酸盐中，所述稀土铝酸盐的居里温度不低于1000℃。所述稀土铝酸盐中存在众多随机取向的铁弹畴，所述铁弹畴在外界施加的应力高于矫顽力时，其C轴倾向于转向至与外应力相平行的方向或垂直于裂纹扩展方向，所述铁弹畴在发生转向时能有效消耗裂纹扩展能量。本发明提供的高韧性复相陶瓷材料，将高居里温度的稀土铝酸盐作为增韧相引入稀土锆酸盐基体中，制备的陶瓷材料在高温1000℃以上仍然具有高断裂韧性和低热导率，作为热障涂层具有很宽广的应用前景。
High-toughness multiphase ceramic material as well as preparation method and application thereof
The invention provides a high-toughness multiphase ceramic material as well as a preparation method and application thereof. The high-toughness multiphase ceramic material comprises rare earth zirconate and rare earth aluminate with high Curie temperature, the rare earth aluminate is distributed in the rare earth zirconate, and the Curie temperature of the rare earth aluminate is not lower than 1000 DEG C. The rare earth aluminate contains a plurality of randomly oriented ferroelastic domains, when the stress applied by the outside is higher than the coercive force, the C axis of the ferroelastic domains tends to turn to the direction parallel to the external stress or perpendicular to the crack propagation direction, and the ferroelastic domains can effectively consume the crack propagation energy during turning. According to the high-toughness multiphase ceramic material provided by the invention, the rare earth aluminate with high Curie temperature is introduced into the rare earthzirconate matrix as a toughening phase, so that the prepared ceramic material still has high fracture toughness and low thermal conductivity at a high temperature of 1000 DEG C or above, and has a very wide application prospect as a thermal barrier coating.
本发明提供了一种高韧性复相陶瓷材料及其制备方法和应用，所述高韧性复相陶瓷材料，包括稀土锆酸盐和高居里温度的稀土铝酸盐，所述稀土铝酸盐分布于稀土锆酸盐中，所述稀土铝酸盐的居里温度不低于1000℃。所述稀土铝酸盐中存在众多随机取向的铁弹畴，所述铁弹畴在外界施加的应力高于矫顽力时，其C轴倾向于转向至与外应力相平行的方向或垂直于裂纹扩展方向，所述铁弹畴在发生转向时能有效消耗裂纹扩展能量。本发明提供的高韧性复相陶瓷材料，将高居里温度的稀土铝酸盐作为增韧相引入稀土锆酸盐基体中，制备的陶瓷材料在高温1000℃以上仍然具有高断裂韧性和低热导率，作为热障涂层具有很宽广的应用前景。
High-toughness multiphase ceramic material as well as preparation method and application thereof
一种高韧性复相陶瓷材料及其制备方法和应用
WANG YANFEI (author) / LIU RONGJUN (author) / WAN FAN (author) / DU JINPING (author)
2021-03-02
Patent
Electronic Resource
Chinese
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