Microstructure transition and selection of Al2O3/Er3Al5O12/ZrO2 ternary eutectic ceramics from micronscale to nanoscale: The effect of rapid solidification

被引：7

作者：

Ren, Q. ^{[1
]}

Su, H. J. ^{[1
]}

Zhang, J. ^{[1
]}

Fan, G. R. ^{[1
]}

Lu, Z. ^{[1
]}

Ma, W. D. ^{[1
]}

Wang, E. Y. ^{[1
]}

Liu, H. F. ^{[1
]}

Ren, J. F. ^{[1
]}

Liu, L. ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Crystal growth; Rapid solidification; Liquid-metal quenching; Nanocomposites; FLOATING-ZONE METHOD; MECHANICAL-PROPERTIES; HIGH-STRENGTH; GROWTH; SYSTEM;

D O I：

10.1016/j.ceramint.2017.10.202

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructure transition and selection of Al2O3/Er3Al5O12/ZrO2 ternary eutectic ceramics with minimal eutectic spacing of 50 nm are studied by laser zone melting under rapid solidification rate. When the eutectic spacings are in micronscale, the 'Chinese script' structure is the main microstructure. As increasing the solidification rate (50 pm/s), the eutectic colony structure is obviously formed. The irregular-regular structural transition and coexistence are produced around eutectic spacing of 100-200 nm. The mechanism of irregular/regular eutectic structure transition and coexistence is revealed by considering the relative kinetic undercooling of each phase. In addition, the strong formation tendency of amorphous/nano-eutectic structure is observed at the surface of as-solidified ceramic drops by rapid liquid-metal quenching.

引用

页码：2611 / 2614

页数：4

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