p型方钴矿热电材料纳米-介观尺度微结构调控

刘志愿, 王永贵, 赵成玉, 杨婷, 夏爱林

Nano-Mesoscopic Scale Microstructure Regulation for p-Type Skutterudite Thermoelectric Materials

LIU Zhiyuan, WANG Yonggui, ZHAO Chengyu, YANG Ting, XIA Ailin

图8 CeFe4Sb12/3%Cf (体积分数)样品断裂面的SEM像和抛光面的SEM像[84],Ce0.85Fe3CoSb12/1.4%rGO (还原氧化石墨烯,体积分数)样品的断面SEM像[85],石墨烯增韧机理示意图和Ce0.85Fe3CoSb12/y%rGO (体积分数)复合材料的弯曲强度(σ)和断裂韧性(KIC)[85]

Fig.8 SEM images of the fracture surfaces showing crack propagation (a)[84], crack branching and fiber pullout (b)[84], crack deflection and fiber pullout (c)[84] of CeFe4Sb12/3%Cf (volume fraction) sample, SEM image of the polished surface of CeFe4Sb12/3%Cf sample (d)[84]; SEM images showing the fractured surface (e)[85], expanded crack (f)[85] for the Ce0.85Fe3CoSb12/1.4%rGO (reduced graphene oxide, volume fraction) sample; schematic diagram of toughing mechanism by rGO (F—force) (g)[85] and three-point flexural strength (σ) and fracture toughness (KIC) of the Ce0.85Fe3CoSb12/y%rGO (volume fraction) composites (h)[85]