Fabrication of self-healing and high strength alumina/glass composite by infiltration route and its application for repairing cracks in dense ceramic

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

Ceramics International Pub Date : 2025-02-01 DOI:10.1016/j.ceramint.2024.11.453

Mu Tang , Weiwei Zhu , Haohao Zou , Guoqing Zu , Ying Han , Xu Ran

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Abstract

In this work, Dy₂O₃-Al₂O₃-SiO₂ glass was used to infiltrate dense alumina ceramics for fabricating alumina/glass composites. At the infiltration temperature of 1450–1500 °C, the infiltration only occurred along the three or multi-grain junctions. When the infiltration temperature reached 1550 °C, the glass was uniformly distributed at the grain boundaries of alumina ceramics. The obtained composites exhibited an optimal flexural strength of 525±25 MPa and a fracture toughness of 5.87 MPa·m^1/2. Moreover, the composites demonstrated excellent thermal shock resistance and self-healing characteristics. After undergoing two cycles of thermal shock treatment from 4 °C to 800 °C, the composites still maintained a flexural strength of 118±15 MPa. Heat treatment of the composites with cracks at 1450 °C for 2 h could restore their mechanical properties to levels comparable to those before thermal shock. Meanwhile, this method can also be applied to repair cracked alumina ceramics. The flexural strength of the repaired alumina ceramics was up to 623±30 MPa.

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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.