Influence of Microstructure on Ultrahigh Thermal Conductivity of Mesophase Pitch-based Carbon Fibers

机译：微观结构对中间相沥青基碳纤维超高导热性的影响

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Carbon fibers (CFs) derived from mesophase pitch (MP) enjoy the distinct advantage over carbon fibers derived from other precursors (viz. polyacrylonitrile, rayon and lignin) in terms of superior thermal and electrical conductivity, making these CFs a valuable reinforcement for composites in thermal management applications. The mechanism by which this remarkable heat conduction takes place is phonon transport, thus fibers with larger and more perfect crystallites have a higher thermal conductivity. The present work investigates the relationship between microstructure formation and thermal conductivity in MP-based carbon fibers. MP-based carbon fibers have been processed by melt-spinning, oxidative stabilization and heat treatment at 1200-2400 C. The transverse and longitudinal microstructure of CFs was characterized by SEM, WAXD, and Raman spectroscopy. Thermal conductivity of various MP-derived carbon fibers was estimated from their electrical conductivity using the Izzi-Lavin correlation. Continuous, unidirectional composites obtained from such fibers will be tested for longitudinal and transverse thermal conductivity directly by thermal flash analysis using an LFA 447. Extensive finite element analysis done in a previous study will be utilized to calculate the thermal conductivity of the carbon fibers.

机译：衍生自中间相沥青（MP）的碳纤维（CFs）在优越的导热性和导电性方面，与衍生自其他前体（即聚丙烯腈，人造丝和木质素）的碳纤维相比，具有明显的优势，使这些CFs成为复合材料中有价值的增强材料热管理应用。这种显着的热传导发生的机理是声子传输，因此具有更大和更完美的微晶的纤维具有更高的热导率。本工作研究了MP基碳纤维的微观结构形成与导热性之间的关系。 MP基碳纤维已通过熔纺，氧化稳定化和在1200-2400 C的温度进行了处理。CF的横向和纵向微观结构通过SEM，WAXD和拉曼光谱进行了表征。使用Izzi-Lavin相关性从各种MP衍生的碳纤维的电导率估算其热导率。由此类纤维制得的连续单向复合材料将通过使用LFA 447的热闪蒸分析直接测试纵向和横向热导率。先前研究中进行的广泛有限元分析将用于计算碳纤维的热导率。

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《North American Thermal Analysis Society conference》|2017年|64-64|共1页
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Victor Bermudez; Amod Ogale;
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mesophase pitch; carbon fiber; thermal conductivity; laser flash analysis;

机译：中间相沥青碳纤维;导热系数;激光闪光分析;

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1. THE EVOLUTION OF MICROSTRUCTURE AND THERMAL CONDUCTIVITY OF MESOPHASE PITCH-BASED CARBON FIBERS WITH HEAT TREATMENT TEMPERATURE [J] . Fan Zhen, Cao Min, Yang Wen-bing, Carbon: An International Journal Sponsored by the American Carbon Society . 2019,第期

机译：具有热处理温度的中间相沥青基碳纤维微观结构和导热率的演变
2. Young's modulus, thermal conductivity, electrical resistivity and coefficient of thermal expansion of mesophase pitch-based carbon fibers [J] . Francisco G. Emmerich Carbon: An International Journal Sponsored by the American Carbon Society . 2014,第Null期

机译：中间相沥青基碳纤维的杨氏模量，导热系数，电阻率和热膨胀系数
3. Pitch-based ribbon-shaped carbon-fiber-reinforced one-dimensional carbon/carbon composites with ultrahigh thermal conductivity [J] . Guanming Yuan, Xuanke Li, Zhijun Dong Carbon: An International Journal Sponsored by the American Carbon Society . 2014,第Null期

机译：沥青基带状碳纤维增强的一维碳/碳复合材料，具有超高导热性
4. Influence of Microstructure on Ultrahigh Thermal Conductivity of Mesophase Pitch-based Carbon Fibers [C] . Victor Bermudez, Amod Ogale North American Thermal Analysis Society conference . 2017

机译：微观结构对中间磷酸盐基碳纤维超高热导率的影响
5. A study of the stabilization, carbonization, and graphitization of mesophase pitch-based carbon fibers. [D] . Rogers, Darren K. 1993

机译：对中间相沥青基碳纤维的稳定，碳化和石墨化的研究。
6. Shortening Stabilization Time Using Pressurized Air Flow in Manufacturing Mesophase Pitch-Based Carbon Fiber [O] . Hiroki Shimanoe, Seunghyun Ko, Young-Pyo Jeon, 2019

机译：在制造中间相沥青基碳纤维中使用加压气流缩短稳定时间
7. Mesophase pitch-based graphite fiber-reinforced acrylonitrile butadiene styrene resin composites with high thermal conductivity [O] . Guanming Yuan, Xuanke Li, Jing Yi, 2015

机译：基于中间相沥青的石墨纤维增强丙烯腈丁二烯苯乙烯树脂复合材料，具有高导热率
8. Study of the Stabilization, Carbonization, and Graphitization of Mesophase Pitch-Based Carbon Fibers [R] . Rogers, D. K. 1993

机译：中间相沥青基碳纤维的稳定化，碳化和石墨化研究

Influence of Microstructure on Ultrahigh Thermal Conductivity of Mesophase Pitch-based Carbon Fibers

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