Ultra-high strength micro-nano quasi-monocrystalline Al2O3/Y3Al5O12/ZrO2 ternary eutectic ceramics processed by high-speed directional solidification

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-04-27 DOI:10.1016/j.jeurceramsoc.2025.117485

Di Zhao , Haijun Su , Baohao Lu , Yuan Liu , Zhonglin Shen , Yinuo Guo , Zhuo Zhang , Min Guo

{"title":"Ultra-high strength micro-nano quasi-monocrystalline Al2O3/Y3Al5O12/ZrO2 ternary eutectic ceramics processed by high-speed directional solidification","authors":"Di Zhao , Haijun Su , Baohao Lu , Yuan Liu , Zhonglin Shen , Yinuo Guo , Zhuo Zhang , Min Guo","doi":"10.1016/j.jeurceramsoc.2025.117485","DOIUrl":null,"url":null,"abstract":"<div><div>A micro-nanostructured Al<sub>2</sub>O<sub>3</sub>/YAG/ZrO<sub>2</sub> eutectic ceramic containing quasi-monocrystalline Al<sub>2</sub>O<sub>3</sub> and Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (YAG) phases was fabricated via high-rate directional solidification at a pulling rate of 100 μm/s. Despite a cellular solidification interface, the two phases grew along specific crystallographic orientations, forming a homogeneous and refined eutectic microstructure. The resulting rod-shaped composites exhibited a large diameter of up to 3.5 mm and an ultra-high flexural strength of 2.5 GPa. The stable directional solidification process and high temperature gradient played a key role in enabling continuous growth of micro-nano quasi-monocrystalline phases under such a high pulling rate. These quasi-monocrystalline phases minimized grain boundary defects and significantly restricted microcrack propagation within the specimens. The effective control of defects ultimately contributed to the exceptional flexural strength. This study highlights the potential of high-speed directional solidification technology for preparing high-performance composite ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 13","pages":"Article 117485"},"PeriodicalIF":5.8000,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The European Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S095522192500305X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

A micro-nanostructured Al₂O₃/YAG/ZrO₂ eutectic ceramic containing quasi-monocrystalline Al₂O₃ and Y₃Al₅O₁₂ (YAG) phases was fabricated via high-rate directional solidification at a pulling rate of 100 μm/s. Despite a cellular solidification interface, the two phases grew along specific crystallographic orientations, forming a homogeneous and refined eutectic microstructure. The resulting rod-shaped composites exhibited a large diameter of up to 3.5 mm and an ultra-high flexural strength of 2.5 GPa. The stable directional solidification process and high temperature gradient played a key role in enabling continuous growth of micro-nano quasi-monocrystalline phases under such a high pulling rate. These quasi-monocrystalline phases minimized grain boundary defects and significantly restricted microcrack propagation within the specimens. The effective control of defects ultimately contributed to the exceptional flexural strength. This study highlights the potential of high-speed directional solidification technology for preparing high-performance composite ceramics.

查看原文本刊更多论文

高速定向凝固制备超高强度准单晶Al2O3/Y3Al5O12/ZrO2三元共晶陶瓷

采用100 μm/s高速率定向凝固制备了Al2O3/YAG/ZrO2准单晶Al2O3和Y3Al5O12 （YAG）相的微纳米共晶陶瓷。尽管存在胞状凝固界面，但两相沿特定的晶体取向生长，形成均匀而细化的共晶组织。所制备的棒状复合材料直径可达3.5 mm，抗弯强度高达2.5 GPa。稳定的定向凝固过程和较高的温度梯度是在如此高的拉拔速率下微纳准单晶相持续生长的关键。这些准单晶相使晶界缺陷最小化，显著地限制了试样内微裂纹的扩展。缺陷的有效控制最终促成了优异的抗弯强度。该研究突出了高速定向凝固技术在制备高性能复合陶瓷方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.