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Inherent anisotropy in transition metal diborides and microstructure/property tailoring in ultra-high temperature ceramics—A review
Journal of the European Ceramic Society ( IF 5.8 ) Pub Date : 2017-09-12 , DOI: 10.1016/j.jeurceramsoc.2017.09.012
Guo-Jun Zhang , De-Wei Ni , Ji Zou , Hai-Tao Liu , Wen-Wen Wu , Ji-Xuan Liu , Tohru S. Suzuki , Yoshio Sakka

This is the first comprehensive review on inherent anisotropic features of transition metal diboride (MB2) and their implementation for tailoring the microstructure and properties of MB2-based Ultra-high temperature Ceramics (UHTCs). The emphasis is on the processing approaches, microstructures, and properties of self-reinforced and/or textured MB2-based composites with elongated MB2 grains. The crystal structure characteristics and grain growth behaviour of MB2 are also critically reviewed. Benefiting from the tailored microstructure, the MB2-based ceramics exhibit some improved properties. Considering the success of Si3N4 ceramics in the field of structural ceramics, it is expected that the potential MB2-based ceramic composites with abundant elongated MB2 grains, textured structures, and controlled grain boundaries would possess improved fracture toughness, thermal shock resistance, and reliable high-temperature properties, which are desired for their practical applications. Accordingly, microstructure designing and tailoring provide an important perspective for the future development of UHTCs.



中文翻译:

过渡金属二硼化物的固有各向异性和超高温陶瓷的微观结构/性能调整—综述

这是对过渡金属二硼化物(MB 2)的固有各向异性特征及其用于定制基于MB 2的超高温陶瓷(UHTC)的微观结构和性能的实现的首次全面综述。重点在于具有细长MB 2晶粒的自增强和/或纹理化MB 2基复合材料的加工方法,微观结构和性能。MB 2的晶体结构特征和晶粒生长行为也得到了严格的审查。受益于定制的微结构,基于MB 2的陶瓷表现出一些改进的性能。考虑Si 3 N 4的成功在结构陶瓷领域中,人们期望具有大量细长MB 2晶粒,纹理结构和受控晶界的潜在MB 2基陶瓷复合材料将具有改善的断裂韧性,抗热震性和可靠的高温性能,这是其实际应用所需要的。因此,微观结构的设计和定制为UHTC的未来发展提供了重要的视角。

更新日期:2017-09-12
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