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首页> 外文期刊>International Journal of Minerals,Metallurgy and Materials >Fabrication method and microstructural characteristics of coal-tar-pitch-based 2D carbon/carbon composites
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Fabrication method and microstructural characteristics of coal-tar-pitch-based 2D carbon/carbon composites

机译：基于煤沥青的2D碳/碳复合材料的制造方法和微观结构特征

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摘要

The lignin-cellulosic texture of wood was used to produce two-dimensional (2D) carbon/carbon (C/C) composites using coal tar pitch. Ash content tests were conducted to select two samples among the different kinds of woods present in Iran, including walnut, white poplar, cherry, willow, buttonwood, apricots, berry, and blue wood. Walnut and white poplar with ash contents of 1.994wt% and 0.351wt%, respectively, were selected. The behavior of these woods during pyrolysis was investigated by differential thermal analysis (DTA) and thermo gravimetric (TG) analysis. The bulk density and open porosity were measured after carbonization and densification. The microstructural characteristics of samples were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared (FT-IR) spectroscopy. The results indicate that the density of both the walnut and white poplar is increased, and the open porosity is decreased with the increasing number of carbonization cycles. The XRD patterns of the wood charcoal change gradually with increasing pyrolysis temperature, possibly as a result of the ultra-structural changes in the charcoal or the presence of carbonized coal tar pitch in the composite's body.
机译：木质素 - 纤维素纹理的木材用煤焦间距产生二维（2D）碳/碳（C / C）复合材料。进行了灰分含量测试，以选择伊朗的不同种类的树林中的两个样品，包括核桃，白色杨树，樱桃，柳树，纽扣，杏，浆果和蓝色木材。选择核桃和白杨，分别为1.994wt％和0.351wt％的灰分含量。通过差分热分析（DTA）和热重量（TG）分析研究了这些树木在热解期间的行为。碳化和致密化后测量堆积密度和开孔。通过扫描电子显微镜（SEM），X射线衍射（XRD）和傅里叶变换红外（FT-IR）光谱研究样品的微观结构特性。结果表明，核桃和白色杨树的密度增加，并且随着碳化循环的越来越多的碳化循环而降低开孔。木炭木炭的XRD模式随着热解温度的增加而变化，可能是由于木炭中的超结构变化或复合材料体内碳化煤焦沥青的存在。

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