caa a22 4500 463225155 CHVBK 20180405153224.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0519-4 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0519-4 Effect of microstructure on the modulus of PAN-based carbon fibers during high temperature treatment and hot stretching graphitization [Elektronische Daten] [Dongfeng Li, Haojing Wang, Xinkui Wang] The changes of microstructure and Young's modulus of PAN-based carbon fibers during the high temperature treatment (2400-3000°C, stretching 0%) and hot stretching graphitization (0-5%, 2400°C) were compared. It was observed that although the Young's modulus of the fibers could be increased by the two graphitization techniques, the microstructure parameters determined by X-ray diffraction were different for the same value of modulus. The relationship between microstructure and modulus showed that Young's modulus not only depended on the preferred orientation, but also related to the crystallite size (L c and L a ) and shape (L a /L c ). On the other hand, it was found that crystallite size of the fibers was mainly affected by heat treatment temperature and the crystallite shape could be altered by hot stretching graphitization. Further investigation indicated that the fibers were composed of turbostratic carbon structure even after heat treated to 3000°C, which could be detected from the absence of 101 and 112 peaks in X-ray diffraction pattern, and the interlayer spacing (d002) and preferred orientation (Z) were only 0.3430nm and 14.71°, respectively. Springer Science+Business Media, LLC, 2007 Li Dongfeng Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, 030001, Taiyuan, China aut Wang Haojing Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, 030001, Taiyuan, China aut Wang Xinkui Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, 030001, Taiyuan, China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4642-4649 0022-2461 42:12<4642 2007 42 10853 https://doi.org/10.1007/s10853-006-0519-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0519-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Dongfeng Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, 030001, Taiyuan, China aut NATIONALLICENCE 700 1- Wang Haojing Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, 030001, Taiyuan, China aut NATIONALLICENCE 700 1- Wang Xinkui Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, 030001, Taiyuan, China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4642-4649 0022-2461 42:12<4642 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer