Functionally graded Al2O3‐based ceramic systems by gel casting method

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS International Journal of Applied Ceramic Technology Pub Date : 2024-08-23 DOI:10.1111/ijac.14898

Gülsüm Topateş, Erdem Akça, Yahya Kemal Tür, Cihangir Duran

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Abstract

Functionally graded ceramic systems consisted of Al2O3/(Al2O3–ZrO2) and Al2O3/(Al2O3–Nd2Ti2O7) have been produced by gel casting. In Al2O3/ZrO2 systems, Al2O3 was gathered with three different Al2O3/ZrO2 mixtures with varying ZrO2 contents. For Al2O3/Nd2Ti2O7 system, Al2O3 layer was combined with 3 mol% Nd2Ti2O7‐doped Al2O3. All samples sintered at 1480 and 1540°C showed strong adhesion between layers without any crack formation. In the Al2O3/ZrO2 systems, both layers were intact; a distinct separation was observed, whereas a large reaction zone was observed for the Al2O3/Nd2Ti2O7 system as a consequence of reaction between both phases. The separation between layers for both systems was identified by SEM–EDX analyses. The hardness and wear tests of the samples showed that functional grading approach ensures combining various physical properties in a monolithic body.

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凝胶浇注法的功能分级 Al2O3 基陶瓷系统

通过凝胶铸造法生产出了由 Al2O3/（Al2O3-ZrO2）和 Al2O3/（Al2O3-Nd2Ti2O7）组成的功能分级陶瓷系统。在 Al2O3/ZrO2 体系中，Al2O3 与 ZrO2 含量不同的三种不同 Al2O3/ZrO2 混合物聚集在一起。在 Al2O3/Nd2Ti2O7 系统中，Al2O3 层与 3 mol% 掺杂 Nd2Ti2O7 的 Al2O3 结合在一起。所有在 1480 和 1540°C 温度下烧结的样品都显示出层间很强的附着力，没有形成任何裂缝。在 Al2O3/ZrO2 系统中，两个层都完好无损；观察到明显的分离，而在 Al2O3/Nd2Ti2O7 系统中，由于两个相之间的反应，观察到一个较大的反应区。通过 SEM-EDX 分析确定了两种体系的层间分离。样品的硬度和磨损测试表明，功能分级方法可确保在整体中结合各种物理特性。

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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;