热解炭
- 网络Pyrolytic carbon;pyrocarbon;pyc
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对采用CVD工艺致密到不同密度,具有不同热解炭含量的2D炭布针刺体试样,利用沥青高压浸渍炭化工艺增密至相同的最终密度,然后对其进行力学、热学性能及等离子烧蚀试验。
The 2D carbon cloth needling samples with different PyC content were fabricated by CVD technique first , then densified to the same density by pitch high pressure dipping carbonization technology . The mechanical properties and ablation properties were measured .
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通过偏光显微镜测定材料不同区域CVI热解炭的消光角,分析热解炭显微结构在试样中的分布规律。
Extinction angles of CVI pyrocarbon at different areas of the samples were tested by polarized light microscopy , which were used to analyze the alteration of the microstructure of pyrocarbon .
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在C材料磨损表面,热解炭磨屑呈片状形貌,轴向垂直滑动方向的纤维呈螺旋状断裂形貌。
The fiber with the axis perpendicular to the sliding direction has the helical crack morphology .
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热解炭按粒径存在一定的分布,热解炭颗粒越小,石墨质C含量越低;
The PCB was sieved , and the smaller the PCB particle diameter , the lower the content of graphitic C.
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树脂热解炭制备SiC纳米微粉
Synthesis of Nanometer SiC Powder From Resin Char
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炭纤维/热解炭+Al2O3复合材料的微观结构研究
Study on the microstructure of carbon fiber / pyrolytic carbon + al2o3 Composites
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C/C复合材料断口热解炭及其界面形貌SEM分析
Analysis of Fracture Morphologies of Pyrocarbons and Their Interface in C / C Composites by SEM
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XRD分析表明,经过溴插层的热解炭出现了新的不完整的衍射峰,意味着形成了插层化合物。
Many new diffraction peaks appeared in XRD , which imply that new graphite intercalation compounds are formed after intercalation .
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热解炭中C和O的含量高,含氧官能团主要为醇、酚、酯、内酯、酸酐和醚,有大量芳香稠环的存在,热解温度越高,芳构化越高;
The concentration of C and O in PCBs is high and the principal oxygen-containing functional groups in PCBs are alcohol , phenol , ester , lactone , anhydride and ether .
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载气对CVIC/C材料密度和热解炭结构分布的影响
Effects of carrier gas on density and microstructure distribution of CVI-derived C / C composites
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废轮胎回转窑中试热解炭中O、S、N、Zn的X射线光电子能谱(XPS)分析
X-ray photoelectron spectroscopy ( XPS ) analysis on O , S , N and Zn in carbon black from pyrolysis of used tire in pilot-scale rotary kiln
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揭示了影响2D炭炭复合材料弯曲挠度的关键因素是纤维与热解炭基体界面的结合情况。
In fact , the flexural deflection of 2D C / C composites depends on the performance of the pyrocarbon and the interfacial bonding between fibers and matrix .
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应用X射线光电子能谱(XPS)对废轮胎回转窑中试热解炭(PCB)中C元素的化学形态进行分析。
The chemical structure of C in pyrolytic carbon black ( PCB ) from the pyrolysis of used tires in a pilot-scale rotary kiln was analyzed by X-ray photoelectron spectroscopy ( XPS ) .
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热解炭表面吸附、沉积物厚度的近似数量级为0.2mm,热解炭本体中C元素的化学形态并未受到表面吸附、沉积层太大的影响。
The thickness of the PCB surface layer was about 0.2 mm and the chemical structure of C in the bulk of PCB was not affected by the surface layer .
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本文以废弃松树锯末热解炭(PyC)为原料,用磷酸浸泡-微波辐射的方法对其改性。
In this research , H3PO4-microwave method was used to modify the pine sawdust pyrolytic char ( PyC ) .
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结果表明:三次CVI热解炭均为光滑层结构,且纤维体积分数越高,C/C复合材料的石墨化度也越高;
The results show that the microstructures of three kinds of C / C composites are smooth laminar ( SL ), and C / C composites with higher fibre volume fraction have higher graphitization degree ;
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采用浸渍模压与CVD复合工艺可在炭纸表面形成连续均匀的热解炭层,增强了纤维与基体的结合,减少了裂纹缺陷,加强了电流的传导。
In this way , pyrocarbon can form continuously and uniformly on the carbon fiber surface , which enhances the combination of carbon fibers and matrix , eliminates the crack flaws , and moreover improves the in-plane electrical resistance .
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RL比SL结构热解炭容易石墨化,经2400℃石墨化处理后,两者(002)衍射弧宽度分别为39°和66°,对应的石墨化度分别为87.6%和25.6%。
Heat treated at 2400 ℃, the angular width of the ( 002 ) diffraction arc of them are 39 ? and 66 ? respectively , and the graphitization degree 87.6 % and 25.6 % .
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以X射线光电子能谱(XPS)对废轮胎回转窑中试热解炭表面组分进行实验分析,研究热解炭本体与表面的异同,热解温度、热解炭粒径的影响。
The surface component of carbon black from pyrolysis of used tires in a pilot-scale rotary kiln was analyzed by X-ray photoelectron spectroscopy ( XPS ), and the difference between surface and bulk of pyrolytic carbon black ( PCB ) depending on pyrolysis temperature and PCB particle diameter was studied .
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气相中氢气体积分数的增加调节基于化学吸附机制和物理吸附机制的两类热解炭沉积速率之间的关系,使得热解炭显微结构出现SL→RL→SL→ISO的转变。
The addition of the hydrogen content in the reactant gas adjust the relationship between two kinds of pyrocarbon deposition rate based on respectively chemical absorption mechanism and physical absorption mechanism , which change the pyrocarbon microstructure as the following sequence : SL-RL-SL-ISO .
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PLM分析表明所得材料偏光形貌表现为光滑层(SL)结构,SEM形貌照片测算可知热解炭沉积速率在6.6μm/h以上。
PLM ( polarized light microscope ) analysis indicates the pyrolytic carbon of C / C composite is smooth laminar ( SL ) . According to SEM image , the deposition rate of pyrolytic carbon can be measured and calculated over 6.6 μ m / h.
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主要介绍了炭/炭复合材料(C/C)的化学气相沉积(CVD)制备方法及其影响因素,以及热解炭的组织与沉积机理。
Carbon / carbon composites ( C / C ) prepared by chemical vapor deposition ( CVD ) are reviewed in this paper , which mainly covers the fabrication methods , the influential factors , the tissues of pyrolytic carbon and the deposition mechanisms involved in the process .
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近年来发展了一种用光学原理测定各向异性因子OPTAF的方法,用它能直接在微型燃料球上快速、精细地测定热解炭色覆层的晶粒择尤取向程度。
The orientation anisotropy expressed with Optical Anisotropy Factor ( OPTAF ), can be measured rapidly and precisely by this method .
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除了能获得中等织构的光滑层(SL)和带状结构的热解炭,还可获得高织构的粗糙层结构(RL)热解炭,在2300℃、2h热处理后,其石墨化度达到77%以上。
Through optimizing the infiltration conditions , some microstructures of pyrolytic carbon can be obtained , range from rough laminar , smooth laminar , and banded structure . The graphitization degree of the rough laminar can be over 77 % after heat treatment at 2300 ℃ for 2h .
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制备致密热解炭层的新工艺研究
Study on the new coating technology for dense pyrolytic carbon layer
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不同种类生物质热解炭的特性实验研究
Experimental Research on the Characterization of Char Product from Biomass Pyrolysis
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废轮胎热解炭的分析及其活化特性的研究
Characterizations and activation study of char from pyrolysis of used tires
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不同热解炭结构的炭/炭复合材料的摩擦特性
Friction Properties of Carbon / Carbon Composites with Different Pyrocarbon Structure
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利用废轮胎热解炭制取活性炭的试验研究
Conversion of pyrolytic chars from used tires to activated carbon
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高温热处理对光滑层热解炭裂纹形成的影响
Influence of heat-treatment on crack initiation in smooth laminar pyrolytic carbon matrix