Regulating the microstructures and mechanical properties of Al2O3 whisker reinforced ZrO2 ceramic composite by dynamic hot forging

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

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.140

Hongtian He , Haitao Tian , Jingchong Huang , Chao Ma , Hailong Wang , Daoyang Han , Hongxia Lu , Hongliang Xu , Rui Zhang , Gang Shao , Linan An

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引用次数: 0

Abstract

Inherent inferior plasticity of ceramic composites hinders severely the improvement of mechanical properties via increment of dislocation density and transformation of morphology by post-treatment. To date, dynamic hot forging (DHF) is discovered as a direct and efficient strategy to promote deformation and dislocation density in ceramics. Herein, we forge the Al₂O₃ whisker reinforced ZrO₂ composite via DHF and systematically study the effect of dynamic pressure amplitude on the microstructure regulation and mechanical properties. The results show that dynamic pressure can produce intragranular dislocations in the composite, and thus leading to plastic deformation via dislocation-accommodated grain-boundary sliding. Furthermore, the vibration of pressure amplitude can significantly promote dislocation density, and thereby resulting in regulation of dislocation morphology and interior microstructures. The corresponding mechanical properties of the composite is also significantly improved by DHF process. This work provides a novel pathway for regulating microstructures and improving mechanical properties of ceramic composites via DHF.

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动态热锻对Al2O3晶须增强ZrO2陶瓷复合材料组织和力学性能的调控

陶瓷复合材料固有的塑性差严重阻碍了后处理过程中位错密度的增加和形貌的转变对其力学性能的改善。迄今为止，动态热锻（DHF）是一种直接有效的提高陶瓷变形和位错密度的方法。本文采用DHF法锻造了Al2O3晶须增强ZrO2复合材料，系统研究了动压幅值对其组织调控和力学性能的影响。结果表明：动压可使复合材料产生晶内位错，从而通过位错调节的晶界滑动导致塑性变形；此外，压力振幅的振动可以显著提高位错密度，从而导致位错形态和内部显微组织的调节。DHF工艺也显著提高了复合材料的力学性能。本研究为通过DHF调控陶瓷复合材料的微观组织和提高陶瓷复合材料的力学性能提供了一条新的途径。

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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.