In situ processing of MWCNTs/leucite composites through geopolymer precursor

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• 作者：Jingkun Yuan^a ; ¹ ; Peigang He^a ; ¹ ; ^{peiganghe@hit.edu.cn} ; ^{hithepeigang@126.com} ; Dechang Jia^a ; ^b ; Shuai Fu^a ; Yao Zhang^a ; Xuzhao Liu^a ; Delong Cai^a ; Zhihua Yang^a ; ^b ; Xiaoming Duan^a ; ^b ; Shengjin Wang^a ; Yu Zhou^a
• 关键词：Geopolymer ; MWCNTs ; High-temperature treatment ; Microstructure ; Mechanical properties
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：May 2017
• 年：2017
• 卷：37
• 期：5
• 页码：2219-2226
• 全文大小：4292 K
• 卷排序：37

文摘

A serial of multi-walled carbon nanotubes (MWCNTs) reinforced geopolymer composites were prepared, and then heated at elevated temperature to fabricate MWCNTs/leucite composites by in situ transformation. Effects of high-temperature treatment on the microstructure evolution and mechanical performance of the composites were investigated. The results indicated that the introduction of MWCNTs could improve the mechanical properties of geopolymer, and the optimum content was 3 wt%. The mechanical performance declined instead with the further increase in MWCNTs content up to 5 wt%, which could be attributed to the agglomeration of MWCNTs. Significant improvements in mechanical properties were achieved after the composites were treated in a temperature range from 950 °C to 1200 °C relative to their original state before heat treatment. The significant improvements could be described to the matrix densification, and leucite formation as well as the proper interface bonding state between carbon nanotube and leucite matrix.