Alumina and alumina/SWCNT nanocomposites have been sintered by spark plasma sintering, obtaining relative densities higher than 99%. Microstuctural characterization revealed a grain microstructure in the submicron range, where alumina/SWCNT nanocomposites exhibited a good CNTs dispersion thought the ceramic matrix. Creep experiments performed in both materials showed a similar mechanical behavior, where the addition of CNTs seems to have a negligible effect on the strain rate, in contrast to results reported by other authors. Grain boundary sliding accommodated by lattice diffusion has been identified as the high temperature deformation mechanisms in both samples, alumina and alumina/SWCNT nanocomposites. We have discussed about the role of CNTs influence on the plasticity of these composites.

氧化铝和氧化铝/ SWCNT纳米复合材料已通过火花等离子烧结进行了烧结，其相对密度高于99％。微观结构表征显示出亚微米范围内的晶粒微观结构，其中氧化铝/ SWCNT纳米复合材料表现出良好的CNTs分散性（以陶瓷基质为基础）。与其他作者报道的结果相反，在两种材料中进行的蠕变实验均显示出相似的机械行为，其中添加CNT对应变速率的影响似乎可以忽略不计。晶格扩散调节的晶界滑动已被确定为氧化铝和氧化铝/ SWCNT纳米复合材料中的高温变形机理。我们已经讨论了碳纳米管对这些复合材料可塑性的影响。