Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rare earth aluminate eutectic ceramic material and preparation method thereof
The invention discloses a rare earth aluminate eutectic ceramic material with high toughness and low thermal conductivity and a preparation method of the rare earth aluminate eutectic ceramic material. The rare earth aluminate eutectic ceramic material comprises two phases of xRE3Al5O12/yREAlO3, wherein x: y = 3: 2, and RE is one or more of La, Nd, Sm, Gd, Y, Yb, Lu and Er. The ceramic material disclosed by the invention is toughened by utilizing the ferroelastic characteristic of REAlO3, so that the ceramic has high fracture toughness, and meanwhile, the ceramic material has the advantage of fine crystal grains of an eutectic ceramic material. The high-temperature thermal conductivity of the ceramic is not higher than 2.0 W/(m.K), the thermal expansion coefficient is (8-12) * 10 <-6 >/K, and the fracture toughness is higher than 3.0 MPa.m < 1/2 >. The rare earth aluminate eutectic ceramic material prepared by the invention is wide in component range, has the advantages of simple synthesis process, low thermal conductivity, high fracture toughness and high expansion coefficient, and has wide application prospects in the field of high-temperature thermal barrier coating materials.
本发明公开了一种高韧性、低热导的稀土铝酸盐共晶陶瓷材料及其制备方法，稀土铝酸盐共晶陶瓷材料的成分为xRE3Al5O12/yREAlO3两种物相；其中x:y＝3:2，RE为La、Nd、Sm、Gd、Y、Yb、Lu以及Er中的一种或几种。本发明的陶瓷材料利用REAlO3的铁弹特性进行增韧使得陶瓷具有高断裂韧性，同时具有共晶陶瓷材料晶粒细小的优点。该陶瓷的高温热导率不高于2.0W/(m·K)，热膨胀系数为(8～12)×10‑6/K，断裂韧性高于3.0MPa·m1/2。本发明所制备的稀土铝酸盐共晶陶瓷材料成分范围广，具有合成工艺简单、低热导率、高断裂韧性、高膨胀系数的优点，在高温热障涂层材料领域具有广泛的应用前景。
Rare earth aluminate eutectic ceramic material and preparation method thereof
The invention discloses a rare earth aluminate eutectic ceramic material with high toughness and low thermal conductivity and a preparation method of the rare earth aluminate eutectic ceramic material. The rare earth aluminate eutectic ceramic material comprises two phases of xRE3Al5O12/yREAlO3, wherein x: y = 3: 2, and RE is one or more of La, Nd, Sm, Gd, Y, Yb, Lu and Er. The ceramic material disclosed by the invention is toughened by utilizing the ferroelastic characteristic of REAlO3, so that the ceramic has high fracture toughness, and meanwhile, the ceramic material has the advantage of fine crystal grains of an eutectic ceramic material. The high-temperature thermal conductivity of the ceramic is not higher than 2.0 W/(m.K), the thermal expansion coefficient is (8-12) * 10 <-6 >/K, and the fracture toughness is higher than 3.0 MPa.m < 1/2 >. The rare earth aluminate eutectic ceramic material prepared by the invention is wide in component range, has the advantages of simple synthesis process, low thermal conductivity, high fracture toughness and high expansion coefficient, and has wide application prospects in the field of high-temperature thermal barrier coating materials.
本发明公开了一种高韧性、低热导的稀土铝酸盐共晶陶瓷材料及其制备方法，稀土铝酸盐共晶陶瓷材料的成分为xRE3Al5O12/yREAlO3两种物相；其中x:y＝3:2，RE为La、Nd、Sm、Gd、Y、Yb、Lu以及Er中的一种或几种。本发明的陶瓷材料利用REAlO3的铁弹特性进行增韧使得陶瓷具有高断裂韧性，同时具有共晶陶瓷材料晶粒细小的优点。该陶瓷的高温热导率不高于2.0W/(m·K)，热膨胀系数为(8～12)×10‑6/K，断裂韧性高于3.0MPa·m1/2。本发明所制备的稀土铝酸盐共晶陶瓷材料成分范围广，具有合成工艺简单、低热导率、高断裂韧性、高膨胀系数的优点，在高温热障涂层材料领域具有广泛的应用前景。
Rare earth aluminate eutectic ceramic material and preparation method thereof
一种稀土铝酸盐共晶陶瓷材料及其制备方法
ZHAO ZIFAN (Autor:in) / WANG QING (Autor:in) / RUAN ZIYANG (Autor:in) / LEE GUN-WOO (Autor:in) / FENG JING (Autor:in)
16.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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