Effect the Sintering Temperature on the Microstructure and Flexural Strength of ZrO₂ Ceramics Produced by NanoParticle Jetting.

IF 3.1 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-06-03 DOI:10.3390/ma18112605

Youji Huang, Xiaorong Li, Hongyu Chen, Kun Ren, Huijun Guo, Huan Qi

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引用次数: 0

Abstract

Zirconia ceramics (ZrO₂) have received significant attention due to their excellent mechanical properties and broad application prospects. Additive manufacturing, especially nanoparticle jetting (NPJ), offers a new approach for fabricating zirconia ceramics with complex geometries. However, the sintering process plays a crucial role in determining the final properties of these ceramics, and the effect of sintering temperature on NPJ printed zirconia ceramics remains to be fully understood. This study investigates the impact of sintering temperature on the properties of zirconia ceramics fabricated via NPJ. NPJ-printed ZrO₂ green bodies were sintered at varying temperatures, and their phase composition, microstructure, and flexural strength were analyzed. Results show that as the sintering temperature rises from 800 °C to 1450 °C, the relative density of ZrO₂ increases from 55.0% to 98.3%, and the flexural strength rises from 9.3 MPa to 356.1 MPa. The green body consists of monoclinic (m-ZrO₂) and tetragonal (t-ZrO₂) phases, with m-ZrO₂ completely transforming into t-ZrO₂ at 1000 °C. Grain size also increases with temperature. The improvement in zirconia's flexural strength is primarily attributed to a combination of grain size and porosity. This research provides guidance for optimizing the sintering process of NPJ-printed ZrO₂ ceramics.

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烧结温度对纳米颗粒喷射制备ZrO2陶瓷微观结构和抗弯强度的影响

氧化锆陶瓷（ZrO2）因其优异的力学性能和广阔的应用前景而备受关注。增材制造，特别是纳米颗粒喷射（NPJ），为制造复杂几何形状的氧化锆陶瓷提供了新的途径。然而，烧结工艺对这些陶瓷的最终性能起着至关重要的作用，烧结温度对NPJ印刷氧化锆陶瓷的影响尚不完全清楚。研究了烧结温度对NPJ法制备氧化锆陶瓷性能的影响。在不同温度下烧结npj印刷的ZrO2绿体，分析其相组成、显微组织和抗弯强度。结果表明：随着烧结温度从800℃升高到1450℃，ZrO2的相对密度从55.0%提高到98.3%，抗弯强度从9.3 MPa提高到356.1 MPa；绿体由单斜相（m-ZrO2）和四方相（t-ZrO2）组成，其中m-ZrO2在1000℃时完全转变为t-ZrO2。晶粒尺寸也随温度的升高而增大。氧化锆抗弯强度的提高主要是由于晶粒尺寸和孔隙率的共同作用。该研究为优化npj印刷ZrO2陶瓷的烧结工艺提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.