Microstructure of mesophase pitch-based carbon fiber and its control

Mochida, Isao; Yoon, Seong Ho; Takano, Nobuyuki; Fortin, F.; Korai, Yozo; Yokogawa, Kiyoshi

doi:10.1016/0008-6223(95)00172-7

Cited by 124 publications

(43 citation statements)

References 17 publications

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“…or eliminated by precise control of spinning parameters [22,23], the round-shaped carbon fibers exhibiting radial texture in their transverse cross sections remain prone to splitting during high-temperature heat treatment. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Mesophase pitch-based graphite fiber-reinforced acrylonitrile butadiene styrene resin composites with high thermal conductivity

Yuan

Jing

et al. 2015

Carbon

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Section: Resultsmentioning

confidence: 99%

Mesophase pitch-based graphite fiber-reinforced acrylonitrile butadiene styrene resin composites with high thermal conductivity

Yuan

Jing

et al. 2015

Carbon

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“…10. The latter with a radial texture on the transverse cross-section usually tends to form a Pac-man wedge structure [22,45].…”

Section: Micro-elemental Analyses Of the Stabilized Thick Tapesmentioning

confidence: 99%

A comprehensive study on the oxidative stabilization of mesophase pitch-based tape-shaped thick fibers with oxygen

Yuan

Xiong

et al. 2017

Carbon

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Tape-shaped pitch fibers with a transverse cross-sectional size of 400 m width and ~30 m thickness, melt-spun from mesophase pitch, were adopted as a model for treatment in oxygen using various temperatures and durations to investigate their stabilization behavior. Several characterization techniques were used to systematically analyze the functional group species, oxygen content and distribution, local composition, thermal pyrolysis behavior and micro-structural changes in the various stabilized tapes. After oxidative stabilization treatment, the tape-shaped fiber exhibits uniform shrinkage behavior during subsequent heat treatments thereby maintaining its * Corresponding author. E-mail address: xkli8524@sina.com (X. Li) 2 tape shape and structural integrity. The ~30 m thick tapes can be stabilized completely by treatment in oxygen at 220 °C for ~10 h and this indicates a high efficiency of stabilization, which is, perhaps unexpectedly, higher than that of corresponding ~30 m diameter round-shaped fibers. Thermal decomposition pathways varied with the degree of stabilization and have obvious effects on the microstructure of the resulted tapes, which in turn strongly influences their final physical properties. Pitch tapes oxidized under mild conditions offered relatively higher mechanical performance. Tensile strength and Young's modulus of 2500 °C graphitized tapes, previously oxidatively stabilized at 220 °C for 20 h, were measured to be about 2 and 250 GPa, respectively.

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“…Much finer texture can be observed in the outer zone than that in the core area. The bent feature [22] of the transition domains changes the contour under polarized light, as evidenced by the rings around the outer zone of the transverse section of the carbon fibers shown in Fig. 2.…”

Section: Om and Sem Observation Of Carbon Fibersmentioning

confidence: 97%

The effect of the spinning conditions on the structure of mesophase pitch-based carbon fibers by Taguchi method

Jiang¹,

Ouyang²,

Yao³

et al. 2016

Carbon letters

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Taguchi's experimental design was employed in the melt spinning of molten mesophase pitch to produce carbon fibers. The textures of the obtained carbon fibers were radial with varied crack angles, as observed by scanning electron microscopy and polarized optical imaging. The diameter, crack angle, preferred orientation, and tensile modulus of the produced samples were examined to investigate the influence of four spinning variables. The relative importance of the variables has been emphasized for each characteristic. The results show that thicker carbon fiber can be obtained with a smaller entry angle, a higher spinning temperature, a reduced winding speed, and an increased extrusion pressure. The winding speed was found to be the most significant factor in relation to the fiber diameter. While it was observed that thicker carbon fiber generally shows improved preferred orientation, the most important variable affecting the preferred orientation was found to be the entry angle. As the entry angle decreased from 120° to 60°, the shear flow was enhanced to induce more ordered radial alignment of crystallite planes so as to obtain carbon fibers with a higher degree of preferred orientation. As a consequence, the crack angle was increased, and the tensile modulus was improved.

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Microstructure of mesophase pitch-based carbon fiber and its control

Cited by 124 publications

References 17 publications

Mesophase pitch-based graphite fiber-reinforced acrylonitrile butadiene styrene resin composites with high thermal conductivity

Mesophase pitch-based graphite fiber-reinforced acrylonitrile butadiene styrene resin composites with high thermal conductivity

A comprehensive study on the oxidative stabilization of mesophase pitch-based tape-shaped thick fibers with oxygen

The effect of the spinning conditions on the structure of mesophase pitch-based carbon fibers by Taguchi method

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