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论文类型：期刊论文

发表时间：2013-05-01

发表刊物：SCRIPTA MATERIALIA

收录刊物：SCIE、EI、Scopus

卷号：68

期号：9

页面范围：731-734

ISSN号：1359-6462

关键字：Eutectic ceramic; Superheat treatment; Microstructure refinement; Undercooling

摘要：Directional solidification techniques are not suitable for preparing eutectic ceramics that possess a combination of large dimensions and fine microstructures. Herein, a traditional processing method of melt superheating was adopted to refine the microstructure, and successfully performed on Al2O3/YAG/ZrO2 bulk eutectic with an interphase spacing of 350 nm. The microstructures can be tailored by controlling the melt superheating treatment conditions. The solidification structure transitions are discussed in terms of the classical nucleation mechanism. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.