Ca-ATZ/Ca-ATZ+SiO2功能梯度陶瓷

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Advances in Applied Ceramics Pub Date : 2023-01-02 DOI:10.1080/17436753.2023.2192079

A. Dmitrievskiy, D. G. Zhigacheva, Grigory V. Grigoriev

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引用次数: 0

摘要

研究了添加二氧化硅的铝增韧氧化锆(Ca-ATZ/Ca-ATZ+SiO2)双层复合陶瓷的结构特征、相组成和复杂力学性能。所研究的陶瓷是使用一种经济有效的技术制造的，包括研磨和混合粉末，粉末混合物(不同成分)分层，单轴压制和两段烧结。结果发现，在组合物界面处，断裂韧性突然增加(33%)，硬度和杨氏模量分别下降(8%和7%)。表明了制备具有高硬度比(不低于14 GPa)和断裂韧性比(不低于12 MPa m1/2)的Ca-ATZ+SiO2复合陶瓷(表面薄，不含SiO2)的可能性。考虑到开发的陶瓷对低温降解的抵抗力增加，这将增加产品在潮湿大气中高机械负荷下运行的使用寿命。

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Ca-ATZ/Ca-ATZ+SiO2 functionally graded ceramic

ABSTRACT The paper studies the structural features, phase composition and complex mechanical properties of two-layer composite ceramics based on alumina-toughened zirconia with silica added (Ca-ATZ/Ca-ATZ+SiO2). The ceramics under study were manufactured using a cost-effective technology involving grinding and mixing powders, layering of powder mixtures (different compositions), uniaxial pressing and two-stage sintering. It was found that at the interface of the compositions, there is an abrupt increase in fracture toughness (by 33%) and a decrease in hardness and Young’s modulus (by 8% and 7%, respectively). The possibility of manufacturing composite ceramics Ca-ATZ+SiO2 (with a thin surface layer, not containing SiO2) with a high ratio of hardness (not lower than 14 GPa) and fracture toughness (not lower than 12 MPa m1/2) was shown. Given the increased resistance to low-temperature degradation of the developed ceramics, this will increase the service life of products operated under high mechanical loads in a humid atmosphere.

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来源期刊

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.