Effects of fibre content on mechanical properties and fracture behaviour of short carbon fibre reinforced geopolymer matrix composites

Bulletin of materials science

Dechang Jia¹  Tiesong Lin¹  Defu Liang¹  Peigang He¹  Meirong Wang¹ 

[1] Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, People’s Republic of China$$Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, People’s Republic of ChinaInstitute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, People’s Republic of China$$

关键词: Short carbon fibre;    mechanical properties;    fracture behaviour;    geopolymer;    fibre content;    composite.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Geopolymer matrix composites reinforced with different volume fractions of short carbon fibres (C_f/geopolymer composites) were prepared and the mechanical properties, fracture behaviour and microstructure of as-prepared composites were studied and correlated with fibre content. The results show that short carbon fibres have a great strengthening and toughening effect at low volume percentages of fibres (3.5 and 4.5 vol.%). With the increase of fibre content, the strengthening and toughening effect of short carbon fibres reduce, possibly due to fibre damage, formation of high shear stresses at intersect between fibres and strong interface cohesion of fibre/matrix under higher forming pressure. The property improvements are primarily based on the network structure of short carbon fibre preform and the predominant strengthening and toughening mechanisms are attributed to the apparent fibre bridging and pulling-out effect.

【 授权许可】

Unknown