Directionally Solidified Boride and Carbide Eutectic Ceramics
TLDR
In this article, a review of directionally solidified eutectic (DSE) composites of boride and carbide constituent phases has been presented, along with current limitations and needs for future developments.Abstract:
Borides and carbides generally have outstanding hardness, excellent wear resistance, and high melting points due to their covalent bonding. Directionally solidified eutectic (DSE) composites of boride and carbide constituent phases have been investigated since the 1970s as an approach to produce dense composite microstructures with added control over the microstructure. A variety of DSE ceramic composites have been developed and evaluated as potential materials for structural and functional applications due to their unique thermo-electro-mechanical properties. Renewed interest over the past few decades has been motivated, in part, by the needs for ultrahigh-temperature composites for aerospace applications along with low-density composites for armor applications. Some directionally solidified boride and carbide DSEs exhibit advantages in material properties over monolithic materials. This study reviews historical and recent research on processing methods, microstructure, crystallography, and material properties (mechanical, electrical, thermal properties, and oxidation resistance) of directionally solidified boride and carbide eutectic ceramic composites. Opportunities along with current limitations and needs for future developments are also reviewed and discussed.read more
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Ultra-High Temperature Materials III: Refractory Carbides II (Ti and V Carbides)
TL;DR: In this article, the authors provide a thorough treatment of ultra-high temperature materials with melting (sublimation or decomposition) points around or over 2500 °C, including binary, ternary and multi-component systems.
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Ultra-High Temperature Materials II: Refractory Carbides I (Ta, Hf, NB and Zr Carbides)
TL;DR: In this paper, a thorough treatment of ultra-high temperature materials with melting points around or over 2500 °C is presented, which can be applied in various engineering devices and environmental conditions in the wide range from cryogenic to ultra high temperatures, on the basis of the latest updates in the field of physics, chemistry, nanotechnology, materials science and engineering.
Journal ArticleDOI
Eutectoid-structured WC/W2C heterostructures: A new platform for long-term alkaline hydrogen evolution reaction at low overpotentials
Zhigang Chen,Zhigang Chen,Wenbin Gong,Wenbin Gong,Shan Cong,Shan Cong,Zhen Wang,Zhen Wang,Ge Song,Ge Song,Pan Ting,Pan Ting,Xueqing Tang,Xueqing Tang,Jian Chen,Jian Chen,Weibang Lu,Weibang Lu,Zhigang Zhao,Zhigang Zhao +19 more
TL;DR: In this article, a unique eutectoid-structured WC/W2C heterostructure was proposed for hydrogen evolution reaction (HER) electrocatalysis in alkaline media.
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Effect of ultrasonic power on forming quality of nano-sized Al2O3-ZrO2 eutectic ceramic via laser engineered net shaping (LENS)
TL;DR: In this article, the effects of ultrasonic power on shape, internal cracks, pores and periodic banded structure of nano-sized Al2O3-ZrO2 eutectic ceramic were investigated.
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3D printing of nano-scale Al2O3-ZrO2 eutectic ceramic: Principle analysis and process optimization of pores
TL;DR: In this paper, the formation mechanism of pores was analyzed and the effects of laser power, feeding rate, scanning speed and ultrasonic power on pores were investigated for sample microstructure and phase composition, and the relative density of samples was measured by the progressive focused ion beam and the porosity was calculated by image processing software Image.
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