Effect of PyC coating on mechanical properties of Cf/AZ91D composites

被引:11
|
作者
Zhang, Ting [1 ]
Qi, Lehua [1 ]
Li, Shaolin [2 ]
Wei, Xinliang [1 ]
Ju, Luyan [1 ]
机构
[1] Northwestern Polytech Univ, Sch Mechatron Engn, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Xian, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
PyC coating; microstructure of PyC; C-f/AZ91D composites; mechanical properties; C-F/MG COMPOSITES; CARBON-FIBERS; MATRIX COMPOSITES; TENSILE PROPERTIES; C-SF/AZ91D COMPOSITES; PRESSURE INFILTRATION; ELECTRON-DIFFRACTION; MAGNESIUM; MICROSTRUCTURE; EVOLUTION;
D O I
10.1080/02670844.2017.1404696
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The microstructure of high strength PAN-based T700 carbon fibre (C-f) with pyrolytic carbon (PyC) coating was characterised. Effects of PyC coating on the surface of carbon fibres, interface characteristics, and mechanical properties of C-f/AZ91D composites were evaluated. The results showed that the carbon fibres with PyC coating had higher surface roughness and higher graphitisation which were beneficial to ease hazardous interface reaction. C-f-PyC/AZ91D composites with an optimal PyC coating that is about 150nm thick and has low texture exhibited ultimate tensile strength of 416MPa, which demonstrated 35% improvement compared with the C-f/AZ91D composites. The increase of mechanical properties of C-f-PyC/AZ91D composites could be ascribed to a synergistic effect of the rough C-f surface interlocking, an optimum interfacial bonding between fibres and matrix, and protection of fibres from a corrosive attack of the aluminium element in the matrix.
引用
收藏
页码:852 / 860
页数:9
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