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《Materials for Mechanical Engineering》 2013-05
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Fracture Surfaces of High-Performance Pitch-Based Carbon Fibers after Monofilament Tensile Testing

LI Jing1,2,3,OUYANG Ting2,YANG Xi-ying2,FEI You-qing1,2(1.State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body;2.College of Materials Science and Engineering,Hunan University,Changsha 410082,China;3.Department of Chemistry and Materials Science,Hunan University of Humanities,Science and Technology,Loudi 417000,China)  
The fracture surfaces of high-performance pitch-based carbon fibers after monofilament tensile testing were observed by scanning electron microscopy,and the relation between tensile fracture and tensile strength was analysed.The results show that pitch-based carbon fibers had characteristic fracture morphology of clear graphite crystallitic structure.The tensile fracture of low-strength carbon fibers was relatively smooth,the fracture surfaces became rough and uneven with the increase of the tensile strength,and graphite crystallitic fragments were observed in certain zone of tensile fracture surface of high-strength carbon fibers.
【CateGory Index】: TQ342.742
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