Revisiting the validity of the ‘Garvie criterion’ for the stabilization of doped tetragonal zirconia systems

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Research Pub Date : 2024-08-26 DOI:10.1557/s43578-024-01419-0

Avinash Kant Kaushal, Annu Kumar Lakshya, Anirban Chowdhury

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Abstract

Stabilization mechanisms involving doped zirconia systems have been discussed over the last 60 years. The primary objective of this work is to provide scientific clarifications regarding the relevance of Garvie factor for important doped zirconia systems. With the commercially popular compositions of yttria-stabilized zirconia (YSZ) systems, our results illustrate no relevance of a Garvie criterion for YSZ systems (for yttria doping ≥ 2.5 mol.%). The same was found to be true for ceria (12–20 mol.%)-doped zirconia (CeTZP) systems. The Garvie criterion seems to be strongly system dependent as it was found to be valid for tetragonal CaO-doped (3–4 mol.%) zirconia (CaSZ) systems. Contrary to a ‘consolidation factor’ that was credited for stabilization of tetragonal CaSZ ceramic, an opposite trend (between grain and particle size) was observed for YSZ and CeTZP systems. This was explained in terms of their possible difference and crossover between their respective surface and grain boundary diffusion parameters.

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重新审视稳定掺杂四方氧化锆体系的 "加维标准 "的有效性

过去 60 年来，人们一直在讨论掺杂氧化锆体系的稳定机制。这项工作的主要目的是为重要的掺杂氧化锆体系提供有关加维因子相关性的科学说明。对于商业上流行的钇稳定氧化锆（YSZ）体系成分，我们的研究结果表明加维标准与 YSZ 体系无关（钇掺杂 ≥ 2.5 摩尔%）。掺杂铈（12-20 摩尔%）的氧化锆（CeTZP）体系也是如此。加维标准似乎与体系密切相关，因为它对掺杂 CaO 的四方氧化锆（3-4 摩尔%）体系有效。与用于稳定四方 CaSZ 陶瓷的 "固结因子 "相反，在 YSZ 和 CeTZP 系统中观察到了相反的趋势（晶粒和颗粒尺寸之间）。这是因为它们各自的表面和晶界扩散参数之间可能存在差异和交叉。

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来源期刊

Journal of Materials Research 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.70%

发文量

362

审稿时长

2.8 months

期刊介绍： Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory