Search Results for composite material

Fig. 11 Soft magnetic composite material with channels for direct water cooling. Source: Ref 4 More

Fig. 9 Thermoplastic stitch in carbon fiber composite material. Note the microcracks in the of the stitch. Epi-fluorescence, 390–440 nm excitation, 25× objective More

Fig. 1 Coordinates defined for composite material sample preparation as related to sectioning and viewing planes. Sectioning through the composite thickness on an angle helps in determining ply orientations (i.e., fibers will become elongated). More

Fig. 5 Composite material that was cut using a waterjet. Very little damage is observed at the cut edge of the specimen. A fluorescing dye was applied to the cut edge to determine if cracks were present. Epi-fluorescence, 390–440 nm excitation, 25× objective More

Fig. 6 Cut edge of a composite material after sectioning with an abrasive cut-off saw. The composite was mounted using a Rhodamine-B-dyed epoxy resin and viewed using epi-fluorescence, 390–440 nm excitation, 25× objective. More

Fig. 11 Composite material that was subjected to a laboratory-induced lightning strike. The section shown is 1 mm (0.04 in.) away from the center of the strike. This sample was first impregnated with Rhodamine-B-dyed epoxy casting resin and then, after sectioning, mounted with Coumarin 35 More

Fig. 9 Cross sections of an interlayer-toughened composite material. (a) Bright-field illumination, 25× objective. (b) Same view but after the addition of a solvent-based laser dye (Magnaflux Zyglo, Magnaflux Corp.) to the sample surface. The laser dye is preferentially absorbed More

Fig. 10 Microcracks in a composite material that are difficult to observe using epi-bright-field illumination. (a) Bright-field illumination, 25× objective. (b) Same location viewed after applying a fluorescent penetrant dye (Magnaflux Zyglo) to the surface and back-polishing. Epi-fluorescence More

Fig. 16 Composite material having a dispersed phase that was acid etched for 30 s using the CrO 3 /HNO 3 , etch described in Table 3 . Reflected-light phase contrast, 50× objective More

Fig. 11 Micrographs of a thermoset-matrix carbon fiber composite material comparing the use of two different ramp rates in the cure cycle. (a) 2.8 °C/min (5 °F/min). Transmitted light, phase contrast, 20× objective. (b) 0.56 °C/min (1 °F/min). Transmitted light, phase contrast, 20× objective More

Fig. 2 Cross section of a composite material made with unidirectional carbon fiber prepreg that shows a ply separation in the part. Bright-field illumination, 5× objective More

Fig. 4 Montage of ply wrinkling in a composite material developed during manufacturing. Bright-field illumination, 5× objective More

Fig. 4 Microcracked carbon fiber composite material illustrating the crack morphology in a fiber tow that is in the same plane as the polished surface. Bright-field illumination, 10× objective More

Fig. 12 Intraply microcracks in a carbon fiber composite material. Epi-fluorescence, 390–440 nm excitation, 25× objective More

Fig. 13 Large-scale microcracking in a carbon fiber composite material. Epi-fluorescence, 390–440 nm excitation, 10× objective More

Fig. 1 Micrograph of a carbon fiber composite material that contains a very small dispersed-rubber phase in the matrix. Ultrathin section. Transmitted light, Hoffman modulation contrast, 40× objective More

Fig. 2 Micrograph of a carbon fiber composite material that was toughened using two rubber materials of different molecular weight. Two different phase morphologies are observed, corresponding to the different tougheners. Ultrathin section. Transmitted light, Hoffman modulation contrast, 40 More

Fig. 3 Dispersed-phase-toughened carbon fiber composite material that was sectioned at an oblique angle to obtain a larger view of the interlayer region. Large, irregular ases, with some phases spherical and hollow, were found in the interlayer area and extended into the intraply area More

Fig. 4 Dispersed-phase-toughened carbon fiber composite material that was sectioned at an oblique angle to obtain a larger view of the interlayer region. A complex morphology was revealed, which was also present in the intraply area. Ultrathin section. Transmitted light, differential More

Fig. 3 Impact damage of a carbon fiber composite material that has a brittle matrix. (a) Montage of the impact area. Epi-fluorescence, 390–440 nm excitation, 5× objective. (b) Fiber fracture area in the composite. Epi-fluorescence, 390–440 nm excitation, 25× objective. (c) Fracture shown More