陶瓷/石墨烯块体复合材料的研究进展

李建林¹, 陈彬彬¹, 章文¹, 王连军², 江莞²

Recent Progress in Ceramic/Graphene Bulk Composites

LI Jian-Lin¹, CHEN Bin-Bin¹, ZHANG Wen¹, WANG Lian-Jun², JIANG Wan²

图15 #cod#x003b1;-SiC复合材料样品的TEM照片, 显示了不同石墨烯层数的几个区域。1区: a研究区域的低倍率TEM照片, b是富含SP 2 杂化区的P1区域突出显示的矩形区域的高倍率图像, 显示了少层石墨烯片2L、3L和5L的不同截面; 暗线条线之间的间距与石墨烯之间一致。e是分别在P1和P2位置碳K边界的电子能量损失谱去除多重散射背景后。2区: c具有形成石墨岛屿晶界的低倍率TEM照片, d,g是同一区域的高分辨率TEM照片, 插图是右侧SiC颗粒的电子衍射图。3区:f几十纳米的石墨形成区。4区: h和i代表双层石墨烯的两个不同晶界 [ 40 ]
Fig. 15 TEM images of the #cod#x003b1;-SiC composite sample, showing several regions with different number of graphene layers. Region 1: a low magnification TEM image of the region of interest. b is a higher magnification image of the P1 region inside the highlighted rectangular region which is rich in sp 2 carbon, showing different cross-section views of few-layers graphene flakes 2L, 3L and 5L; the spacing between dark contrast lines is consistent with the spacing between graphene sheets. e are electron energy loss spectroscopy spectra after multiple-scattering background removal of the carbon K edge at positions P1 and P2, respectively. Region 2: c low magnification TEM image of a grain boundary with formation of a graphite island, d, g high-resolution TEM images of the same region, the inset is SEAD of the right side SiC grain. Region 3: f graphitic formation of several tens of nanometers. Region 4: h and i two different grain boundaries presenting bi-layer graphene [ 40 ]