Ultrafast formation of Al2O3-Y3Al5O12 eutectic ceramic by flash sintering
Ultrafast formation of Al2O3-Y3Al5O12 eutectic ceramic by flash sintering
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闪速烧结超快形成Al 2 O 3 →Y 3 Al 5 O 12 共晶陶瓷
DOI：
10.1111/jace.17109
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发表时间：
2020
影响因子：
3.9
通讯作者：
An Linan
中科院分区：
文献类型：
--
作者：
Liu Jinling;Xu Xiang;Liu Dianguang;Chen Liying;Zhao Ke;An Linan
在本研究中，通过在1350°C的炉温下在小于150秒内快速烧结Al 2 O3和Y2 O3的粉末混合物来合成致密的Al 2 O3-Y3 Al 5 O 12（YAG）陶瓷。所得陶瓷具有由交替的Al 2 O3和YAG层组成的定义明确的共晶结构。测得陶瓷的硬度和断裂韧性分别为18.5 GPa和4.3 MPa.m1/2。这些值与通过定向凝固技术制成的类似共晶陶瓷的值相当。研究结果为制备高性能共晶陶瓷提供了一种新的方法，可应用于其他系统。
In this study, a dense Al2O3–Y3Al5O12(YAG) ceramic was synthesized by flash sintering a powder mixture of Al2O3and Y2O3in less than 150 seconds at a furnace temperature of 1350°C. The resultant ceramic has a well‐defined eutectic structure consisting of alternating Al2O3and YAG layers. The hardness and fracture toughness of the ceramic were measured to be 18.5 GPa and 4.3 MPa.m1/2, respectively. These values are comparable to those of similar eutectic ceramics made by directional solidification techniques. The results suggest a new method for making high‐performance eutectic ceramics, which could be applied in other systems.