Characteristics of chemical vapour deposition in micro pore structure in char layer of polymer composites
Characteristics of chemical vapour deposition in micro pore structure in char layer of polymer composites
复制标题
聚合物复合材料炭层微孔结构化学气相沉积特性
DOI：
10.1016/j.polymdegradstab.2020.109222
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发表时间：
2020-08
影响因子：
5.9
通讯作者：
Li Kang
中科院分区：
文献类型：
--
作者：
Xi Kun;Li Jiang;Guo Mengfei;Hu Bozhi;Li Kang
烃类裂解气在聚合物复合材料炭层孔隙结构中的沉积是一种特殊的化学气相沉积过程。尽管碳氢化合物热解气体沉积特性的研究对于深入了解聚合物复合材料的烧蚀机理和建立准确的烧蚀模型具有重要意义，但到目前为止还没有关于这方面的研究报道。在这项研究中，利用设计的模拟烧蚀过程中热解气体在炭层中沉积的实验装置，研究了炭层孔结构中的沉积特性。实验结果表明，沉积过程中孔结构的变化对沉积速率有很大影响。沉积过程可分为孔结构中的快速沉积、过渡性沉积和炭层表面的缓慢沉积。在800-1000℃的温度范围内，炭化层的孔结构沉积速率受温度的影响显著，表现出明显的线性生长关系。(C)2020爱思唯尔有限公司。保留所有权利。
The deposition of hydrocarbon pyrolysis gas in the pore structure of the char layer of polymer composites is a special chemical vapour deposition process. While investigation of hydrocarbon pyrolysis gas deposition characteristics is highly significant for obtaining an in-depth understanding of the ablation mechanism of polymer composites and the establishment of accurate ablation models, no studies on this topic have been reported to date. In this study, the deposition characteristics in the pore structure of the char layer were examined using an experimental device designed to simulate pyrolysis gas deposition in the char layer during ablation. The experimental results show that the deposition rate is affected by the change in the pore structure during the deposition process. The deposition process can be divided into rapid deposition in the pore structure, transition deposition and slow deposition on the surface of the char layer. In the temperature range of 800-1000 degrees C, the deposition rate in the pore structure of the char layer is significant affected by the temperature, showing an obvious linear growth relationship. (C) 2020 Elsevier Ltd. All rights reserved.
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