Porosity dependence of molten sand wetting and infiltration in oxide ceramics

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-29 DOI:10.1016/j.jeurceramsoc.2025.117856

Andrew J. Wright , Timothy Sharobem , Chris Dambra , Brian Keyes , Anindya Ghoshal

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Abstract

The role of porosity in governing the interaction between molten sand and oxide substrates remains poorly understood. Here, we systematically investigate the effect of porosity on CMAS wettability, infiltration, and reactivity across 3 mol.% yttria stabilized zirconia (3YSZ), Gd₂O₃, and (Y_1/2Yb_1/2)₂Si₂O₇ (YYbDS) by coupling high temperature contact angle experiments conducted at 1260 °C for 30 min with microscopy, elemental, and phase analyses. In 3YSZ, increased porosity promoted deeper infiltration but suppressed lateral spreading. Gd₂O₃ showed the opposite trend in that greater porosity enhanced CMAS spreading that was attributed to its reactivity. For YYbDS, despite being chemically reactive, showed reduced spreading with increased porosity. Linear regression revealed strong correlations between porosity and a few wetting parameters depending on the reactivity regime. These findings reveal that porosity dependence on CMAS interactions with a substrate are coupled with reactivity and provide an approach to forecast CMAS behavior with novel materials.

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氧化陶瓷中熔融砂润湿和渗透的孔隙度依赖性

孔隙度在控制熔融砂和氧化物基质之间相互作用中的作用仍然知之甚少。在这里，我们系统地研究了孔隙度对CMAS润湿性、渗透性和3 mol反应性的影响。通过在1260°C下进行30 min的高温接触角实验，结合显微镜、元素和物相分析，钇稳定了氧化锆（3YSZ）、Gd2O3和（Y1/2Yb1/2）2Si2O7 （YYbDS）。在3YSZ中，孔隙度的增加促进了更深的入渗，但抑制了横向扩展。而Gd2O3则表现出相反的趋势，孔隙度越大，CMAS扩张越明显，这是由于Gd2O3的反应性。对于YYbDS，尽管具有化学反应性，但随着孔隙度的增加，扩散程度降低。线性回归显示孔隙度与一些润湿参数之间存在很强的相关性，这取决于反应性状态。这些发现表明，孔隙度依赖于CMAS与衬底的相互作用，并与反应性相结合，为预测CMAS在新材料中的行为提供了一种方法。

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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.