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Characterization of Carbon/Carbon Composites by Kinetic Deconvolution Analysis for a Thermal Oxidation Process: An Examination Using a Series of Mechanical Pencil Leads
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2018-10-19 , DOI: 10.1021/acs.iecr.8b02478
Daichi Hara 1 , Kazuyuki Nishikawa 1 , Nobuyoshi Koga 1
Affiliation  

The thermal behaviors of carbon/carbon (C/C) composites in flowing air were investigated on the basis of mechanical pencil leads with different hardness values and diameters as a model system. Two separated mass-loss processes were observed during heating the mechanical pencil leads in air, which are attributed to the evaporation–decomposition of an impregnation agent and the subsequent thermal oxidation of the residual C/C composite. The thermal behaviors were invariant among the mechanical pencil leads with different diameters, but they systematically changed with hardness. Variations in the thermal behaviors can be quantified by the mass-loss value during the evaporation–decomposition of the impregnation agent, in addition to the kinetic deconvolution analysis that was applied to the multistep thermal oxidation process of carbon components with different reactivities. These results correlate the thermal behavior with the compositional and structural characteristics of C/C composites, which can be useful for characterization and product control.

中文翻译:

碳/碳复合材料的热氧化过程动力学解卷积分析表征:一种使用一系列自动铅笔芯的检验

以具有不同硬度值和直径的自动铅笔芯为模型系统,研究了碳/碳(C / C)复合材料在流动空气中的热行为。在加热空气中的自动铅笔芯时,观察到两个分开的质量损失过程,这归因于浸渍剂的蒸发分解以及随后的残留C / C复合材料的热氧化。在具有不同直径的自动铅笔芯中,热行为是不变的,但是它们随硬度而系统地改变。热行为的变化可以通过浸渍剂的蒸发分解过程中的质量损失值来量化,除了适用于具有不同反应性的碳组分的多步热氧化过程的动力学去卷积分析之外。这些结果将热性能与C / C复合材料的组成和结构特征相关联,这对于表征和控制产品很有用。
更新日期:2018-10-19
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