The chemical vapor deposition of carbon onto a commercial α-Al₂O₃ powder bed produces a pristine film of few-layered-graphene (FLG) uniformly covering the α-Al₂O₃ grains. This obviates both the manipulation of nanocarbons, lengthy mixing steps and the risk of damaging any pre-existing graphene platelets. The powders are consolidated to 99 % by SPS, producing samples where a FLG film is located along the grain boundaries of the submicron α-Al₂O₃. Compared to the pure α-Al₂O₃, the composites are moderately stronger and similarly tough and hard due to crack-deflection and crack-bridging and they are electrically conducting with a percolation threshold below 0.74 vol.% of carbon. The high conductivity values reflect the high quality of the thin FLG film and its continuous nature over very long distances. The samples are characterized by Raman spectroscopy, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy.

碳的化学汽相沉积到商业的α-Al ₂ ö ₃粉末床产生较少层状石墨烯（FLG）均匀地覆盖所述α-Al的原始膜₂ ö _3个晶粒。这样既避免了纳米碳的操作，冗长的混合步骤，又避免了损坏任何先前存在的石墨烯血小板的风险。粉末是采用SPS合并，以99％，产生其中FLG膜沿着所述亚微米的α-Al的晶界位于样品₂ ö ₃。相比于纯的α-Al ₂ ö ₃，由于裂纹挠曲和裂纹桥接，该复合材料具有中等强度，并且类似地坚韧，并且它们的导电阈值低于碳的0.74％（体积）。高电导率值反映了FLG薄膜的高质量及其在很长距离内的连续性。通过拉曼光谱，X射线光电子光谱，扫描和透射电子显微镜对样品进行表征。