Yanlin Huang , Xiaolong Yi , Jin Jiang , Weixin Deng , Xin Wang , Kuo Jiang
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引用次数: 0
Abstract
The ceria-stabilized tetragonal superelastic zirconia materials (18 mol% CeO2-stabilized t-ZrO2, SC), which possess outstanding thermophysical properties, are investigated in this paper. It exhibits exceptional phase stability at 1600 °C and an extremely high fracture toughness (>200 J/m2). The SC/4YSZ thick thermal barrier coatings (TTBCs) are processed using atmospheric plasma spraying (APS). The experimental results reveal that the SC/4YSZ system displays superior thermal shock resistance in comparison to 4YSZ coatings. Specifically, the SC/4YSZ system can withstand 23 consecutive thermal cycles at a surface temperature up to 1750 °C, while the 4YSZ TTBCs fail after only one cycle. The enhanced durability of the SC/4YSZ system is attributed to the superelasticity of the SC coating, which undergoes a stress-induced reversible martensitic transformation, absorbing strain energy as heat. This capability improves with each thermal cycle as the depth of the martensitic phase transformation region increases during thermal cycling. These findings indicate that the SC/4YSZ TTBCs are a promising candidate for ultra-high temperature protection applications.
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.