钙钇共稳定氧化锆的力学性能和耐老化性能：从粉末到陶瓷

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.509

Ya-Nan Feng , Fei-Fan Wang , Weiwei Xiao , Yan Xia , Bin Wei , Shuaihua Wang , Zhonghua Deng , Fei-Fei Chen , Lingyun Li , Yan Yu

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引用次数: 0

摘要

本研究通过引入大半径的二价钙离子和小半径的三价钇离子，制备出具有优异力学性能和耐老化性能的共稳定氧化锆陶瓷。采用反相共沉淀法-水热法制备了一系列高质量的超细xCaO-yY2O3-ZrO2 （x = 2.0, 3.0, y = 0.5, 1.0, 1.5, 2.0）原料粉，用于低温无压烧结制备纳米陶瓷。通过研究烧结温度对致密化、晶粒生长和相演化的影响，优化了烧结工艺。最小掺杂的2.0CaO-0.5Y2O3-ZrO2陶瓷在室温下保持了纯方相，实现了优异韧性和高抗老化性能的平衡。考察了化学成分对xCaO-yY2O3-ZrO2 （x = 2.0, 3.0, y = 0.5, 1.0, 1.5, 2.0）陶瓷显微组织、硬度、韧性和耐时效性能的影响。钙离子和钇离子在晶界处的偏析有效地调整了微观结构。结果表明，用小的三价钇离子代替大的二价钙离子，在不牺牲力学性能的情况下，有效地提高了材料的抗老化性能，这是由于晶界的强化和晶粒间阳离子的不对称分布。本工作不仅生产出具有优异力学性能和耐老化性能的低掺杂氧化锆陶瓷，而且为开发先进的结构陶瓷提供了简单的制备高质量原料粉的方法和精细的烧结微结构工程。

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Mechanical properties and aging resistance of calcia-yttria co-stabilized zirconia: from powder to ceramic

In this study, divalent calcium cation with large radius and trivalent yttrium cation with small radius were introduced to develop co-stabilized zirconia ceramics with both superior mechanical properties and aging resistance. Through a reverse coprecipitation-hydrothermal method, a series of ultrafine xCaO-yY₂O₃-ZrO₂ (x = 2.0, 3.0, y = 0.5, 1.0, 1.5, 2.0) raw powders with high quality were fabricated for the production of nanostructured ceramics via low-temperature pressurelessly sintering. The sintering process was optimized by investigating the effects of sintering temperature on densification, grain growth and phase evolution. The minimally doped 2.0CaO-0.5Y₂O₃-ZrO₂ ceramic retained pure tetragonal phase at room temperature, achieving a balance of excellent toughness and high aging resistance. The impacts of chemical composition on microstructure, hardness, toughness and aging resistance were examined for these xCaO-yY₂O₃-ZrO₂ (x = 2.0, 3.0, y = 0.5, 1.0, 1.5, 2.0) ceramics. The segregation of calcium and yttrium cations at grain boundaries effectively tailored the microstructure. It was observed that substituting small trivalent yttrium cations for large divalent calcium cations effectively enhanced the aging resistance without sacrificing mechanical properties, due to the strengthened grain boundaries and asymmetrical distribution of cations among grains. This work not only produces low-doped zirconia ceramics with both excellent mechanical properties and aging resistance, but also presents straightforward method for preparation of high-quality raw powders and delicate microstructural engineering during sintering for developing advanced structural ceramics.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.