SUBSURFACE AND AT-DEPTH INTERPHASE CHARACTERIZATION IN HYGROTHERMAL AGED CARBON FIBER REINFORCED POLYMER MATRIX COMPOSITE

被引:0
|
作者
Fard, Masoud Yekani [1 ]
Raji, Brian [2 ]
Pankretz, Heidi [1 ]
Mester, Jack [1 ]
Pensky, Alek [1 ]
机构
[1] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA
[2] ASE Inc, 9083 E Raintree Dr, Scottsdale, AZ 85260 USA
来源
PROCEEDINGS OF THE ASME 2020 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2020, VOL 12 | 2020年
关键词
EPOXY-RESIN;
D O I
暂无
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
The interphase region between the carbon monofilament and epoxy matrix in Carbon Fiber Reinforced Polymer Composites (CFRPs) is immensely vital to transfer stress between carbon monofilament and bulk matrix material. To the best of the authors' knowledge, no other research group has studied the interphase region at subsurface and at-depth levels on hygrothermal aged CFRPs. The composite samples were exposed to 60 degrees C and 90% humidity for one and two years. Moisture absorptions were measured periodically to assess water gain in the material. The advanced Atomic Force Microscopy (AFM) based Peak Force Quantitative Nanomechanics Mapping Technique was used to study the physics of the interphase. PFQNM allows non-destructive and simultaneous capture of imaging and mechanical property data with nanometer resolution. The interphase thickness was increased with increased hygrothermal exposure time. The interphase surrounding carbon monofilaments exhibited non-uniform thickness, ranging from similar to 85 to 95 nm in the subsurface level, and from similar to 10 to 75 nm on the at-depth level. Aged samples showed a decrease in average surface roughness, likely due to swelling of the epoxy matrix caused by the moisture absorption. The water diffusion generally followed Fickian [GRAPHICS] .
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页数:5
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