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Low-Temperature Degradation of Composite ATZ Ceramics Reinforced via Multiwalled Carbon Nanotubes
Nanotechnologies in Russia Pub Date : 2020-03-11 , DOI: 10.1134/s199507801903008x
V. V. Korenkov , A. I. Tyurin , V. V. Rodaev , A. O. Zhigachev , A. V. Umrikhin , T. S. Pirozhkova , Y. I. Golovin

Abstract

The influence of water vapor on structural stability and mechanical properties of ceramics based on baddeleite (natural zirconia mineral) and chemically deposited ZrO2 reinforced with carbon nanotubes is studied in this work. These composites are shown to possess high physical and mechanical properties and elevated hydrothermal aging resistance. Composites based on baddeleite and stabilized СаО are characterized via ageing rate of an order of magnitude lower than in the case of commercial ceramics stabilized with Y2О3. The embedding of carbon nanotubes in the composites and the use of spark plasma sintering inhibits the grain growth and amplifies the scale effect in hardness. With that, crack resistance KC under hydrothermal conditions decreases to a lesser extent than in nanotube-free composites.


中文翻译:

多壁碳纳米管增强的复合ATZ陶瓷的低温降解

摘要

这项工作研究了水蒸气对陶瓷的结构稳定性和机械性能的影响,该陶瓷基于铜锌矿(天然氧化锆矿物)和化学沉积的碳纳米管增强的ZrO 2。这些复合材料具有很高的物理和机械性能,并具有较高的耐水热老化性能。基于baddeleite复合材料和稳定СаО经由老化一个数量级的速度比,其中Y稳定化的市售陶瓷的情况下低的特征在于2 О 3。碳纳米管在复合物中的嵌入和火花等离子体烧结的使用抑制了晶粒的生长,并放大了硬度的结垢效应。这样,抗裂性K C 与不含纳米管的复合材料相比,在水热条件下的降低程度较小。
更新日期:2020-03-11
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