pyc

PyC particles fuse easily and transit to layer structure on 1000 ℃ .

1000℃时，热解碳颗粒很容易熔合在一起，向层状形态过渡。

In a certain thickness range ( about 70-220nm ), coefficient of thermal expansion ( CTE ) of the composites decreases gradually with increasing of PyC interphase thickness .

在一定厚度范围（约70～220nm）内，材料的热膨胀系数随热解碳厚度的增加而逐渐降低；

Microstructure and Oxidation Behavior of the SiC / PyC Multilayer Coated Carbon Fibers

SiC/PyC复合涂层碳纤维微观结构及氧化行为研究

Application of Yersinia pestis Label Gene of Plasmid pYC in Detecting Animals and Fleas

鼠疫菌pYC质粒标识基因在动物及蚤检测中的应用

PyC in the outer matrix of fiber bundles is unfavorable for improving the mechanical properties of 2D C / C-SiC .

纤维束外部基体中PyC的引入不利于提高2DC/C-SiC复合材料的力学性能。

Temperature influences on morphology and deposition process of PyC are explained by means of thermodynamics and the nuclei-growth principle of crystals .

运用热力学和晶体成核-长大理论，解释了温度对热解碳形貌和沉积过程的影响。

In this research , H3PO4-microwave method was used to modify the pine sawdust pyrolytic char ( PyC ) .

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。

Spherical PyC was made by control of technical conditions . It is approved that condensation-polymerization mechanism exists in the CVD process by analyzing the intermediates qualitatively .

控制CVD工艺条件得到了球状热解碳，通过对沉积中间体的定性分析，证实了此过程中存在缩聚机理。

However , there are some problems in the fabrication of C / SiC composites , such as long manufacturing cycle , high cost , low oxidation resistance using PyC or BN as the interlayers etc.

然而，C／SiC复合材料的制备存在制造周期长、成本高、以热解碳（PyC）或氮化硼（BN）作为界面抗氧化性能差等问题。

The damping mechanism of C / SiC composites was discussed . The main damping mechanism was consisted of the expanding of crack damping of C fiber and PyC interphase . effect of porosity .

研究了2D和3DC/SiC复合材料的阻尼机制，认为其阻尼机制主要有：内部裂纹扩展、C纤维本身阻尼、界面阻尼以及孔隙率的影响。

Attain the relationship between the deposition conditions and can attain the PyC with anticipated properties by controlling the technical parameter through the computer , which can provide theoretical direction for promoting the finished product rate .

提出了热解碳沉积工艺条件间的相互关系，通过计算机精确控制工艺参数来获得所需性质的热解碳，为提高热解碳成品率提供理论指导。

It is shown that CTE of the composites decrease gradually with PyC interphase thickness increasing when it is in a certain thickness range ( about 70 ~ 220nm ) .

结果表明，当界面层厚度处于一定范围（约70～220nm）内时，C／SiC复合材料的热膨胀系数随热解碳厚度的增加而逐渐降低。

Analysis of the pyc sequence shows that only one ORF exists , which codes 1140 amino acids using GTG as the initiation codon and TAA as the termination codon .

核苷酸序列分析结果表明，该片段全长3657bp，以GTG为起始密码子，编码一个ORF。

Through the PyC transition layer test analysis found that , with the graphite powder add , coating internal exist a lot of grain boundary and defects existed , and these defects improve the transition layer of plastic .

通过对PyC过渡层的测试分析发现，由于石墨粉的添加，涂层内部存在大量晶界与缺陷，这些缺陷的存在提高了过渡层的韧性。

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 .

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 effects of location and quantity of PyC in the matrix on oxidation resistance of 2D C / C-SiC were investigated . Results show that 2D C / C-SiC and 2D C / SiC had identical oxidation behavior controlled by defects .

研究了PyC的引入位置和引入量对2DC/C-SiC复合材料抗氧化性能的影响，表明2DC/SiC与2DC/C-SiC复合材料具有相似的氧化行为，受缺陷控制。

Two-dimensional carbon fiber-reinforced C-SiC binary matrix composites ( 2D C / C-SiC ) with PyC / SiC alternative multi - layered matrix were fabricated by chemical vapor infiltration to modify the matrix of 2D C / SiC composites .

采用化学气相浸渗法对2DC/SiC复合材料进行基体改性，制备了二维碳纤维增韧碳–碳化硅二元基复合材料（twodimensionalcarbonfiberreinforcedC–SiCbinarymatrixcomposites，2DC/C–SiC）。

The result of MD simulation means that : ( 1 ) the microstructure in the amorphous carbon has no obvious change , the slippage which is parallel to the fiber axes in the graphite slices of the PyC interphase was found ;

分子动力学模拟结果表明，（1）界面相内部无定形碳部分微结构无明显变化，石墨片层部分沿纤维轴向滑移；