Tianyu Li , Keying Zhang , Jian Zhang , Dewen Wang , Xuejian Liu , Zhengren Huang , Yan Liu
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引用次数: 0
Abstract
The flash joining of YAG transparent ceramics was achieved within 5 min at 1550 °C. The flexural strength of the joint reaches 242.4 MPa, which is nearly 90 % of the parent material; and the transmittance at 1000 nm is 78.1 %, which is only 3.3 % different from the parent material. Nd:YAG/YAG and Ce:YAG/YAG flash joints were obtained under the same conditions, the doping concentration and type had significant effects on the interfacial diffusion and healing. Subsequently, the influence of non-thermal effect of E-field on flash joining is verified and discussed by EIS, XPS and EPR. The charged oxygen vacancy directed migrated across the joining interface, and accumulated in the negative electrode region together with the defects caused by the healing interface vacancy diffusion. Finally, combined with the joint formation process, the healing model is constructed on the grain and smaller scale.
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.
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