NDLI: Enhanced thermal shock resistance of ultra-high temperature ceramic by biomimetic surface modification

Content Provider	Royal Society of Chemistry (RSC)
Author	Qiu, Yunfeng Han, Jiecai Hu, PingAn Hu, Ping Han, Wenbo Zhang, Xinghong Hong, Changqing Peng, Zujun Zhang, Baoxi Chen, Guiqing
Copyright Year	2015
Abstract	The manipulation of the heat flow in a ceramic matrix composite is of great importance in industrial and academic fields. Energy flow, as a typical behavior of heat motion in ceramic surfaces can be confined within specific sites during thermal shock experiments, which weakens the temperature gradient distribution, and hence suppresses the crack propagation. The heat flow can be rationally controlled by the introduction of a nanostructured surface with a diverse forced convection coefficient and heat transfer resistance. Taking inspiration from a nanofin surface, yttria-stabilized zirconia (YSZ) nanostructures were fabricated using the sol–gel method. This bio-inspired coating exhibits a high forced convection coefficient (2.884 times) and high heat transfer resistance (30 times) because of the existence of irregular nanowires arrays and a porous nanostructure. The introduction of the nanostructured coating resulted in the rapid depression of the thermal gradient and stress concentration, and the crack propagation was also effectively suppressed. This sol–gel coating method effectively enhanced the thermal shock resistance of the ceramic materials, and indicates the potential for the application of ceramics in extreme environments.
Starting Page	2199
Ending Page	2206
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	5
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta05589f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ceramic matrix composite Thermal shock Convection Heat transfer Yttria-stabilized zirconia Nanostructure Stress concentration
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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