Physical characterization of composites based on yttria-stabilized zirconia and doped lanthanum gallate

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2024-12-11 DOI:10.1111/ijac.15003

Talita G. Fujimoto, V. Seriacopi, Izabel F. Machado, Reginaldo Muccillo, Eliana N. S. Muccillo

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Abstract

This work reports a systematic study on the microstructure, electrical conductivity, and nanoindentation of 8 mol% yttria-stabilized zirconia (8YSZ), La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-δ (LSGM) in both pure form and as composites. The main purpose was to evaluate the effects of the minor phase on the properties of the composite materials. Commercial 8YSZ was the major phase. Pure LSGM and composites consisting of 1, 10, and 20 wt.% LSGM were prepared by the solid-state reaction method. Sintering experiments were carried out from 1200°C to 1450°C. The temperature of maximum shrinkage decreased with increasing LSGM content. The average grain size of the composites was dependent on the relative proportion of the minor phase. Interface reactions occurr during sintering. Electrical conductivity of the composites was found to be lower compared to that of 8YSZ. The hardness showed no significant variation with the minor phase content, although a beneficial effect on the elastic modulus was noted for composites containing 10 wt.% LSGM.

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氧化钇稳定氧化锆和掺杂没食子酸镧复合材料的物理表征

本文系统地研究了8mol %钇稳定氧化锆（8YSZ）， La0.9Sr0.1Ga0.8Mg0.2O3-δ (LSGM)纯态和复合态的微观结构、电导率和纳米压痕。主要目的是评价小相对复合材料性能的影响。商业8YSZ是主要阶段。采用固相反应法制备了纯LSGM和含有1、10、20 wt.% LSGM的复合材料。烧结实验在1200 ~ 1450℃范围内进行。随着LSGM含量的增加，最大收缩温度降低。复合材料的平均晶粒尺寸取决于小相的相对比例。烧结过程中发生界面反应。与8YSZ相比，复合材料的电导率较低。低相含量对复合材料的硬度没有显著影响，但对含有10 wt.% LSGM的复合材料的弹性模量有有益的影响。

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来源期刊

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;