Grain growth control and transparency in spark plasma sintered self-doped alumina materials
Grain growth control and transparency in spark plasma sintered self-doped alumina materials
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DOI：
10.1016/j.scriptamat.2009.07.026
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发表时间：
2009-11
影响因子：
6
通讯作者：
M. Suárez;Adolfo Fernández;J. Menéndez;R. Torrecillas
中科院分区：
文献类型：
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作者：
M. Suárez;Adolfo Fernández;J. Menéndez;R. Torrecillas
用铝醇盐掺杂氧化铝颗粒可以获得致密的火花等离子烧结（SPSed）材料，与纯材料相比，该材料具有细化的晶粒尺寸，这对其透明度至关重要。开发了一种考虑孔隙和晶粒尺寸分布的光学模型，以获得有关致密材料孔隙率的信息。这项工作表明原子扩散机制不依赖于烧结技术。我们发现 SPS 材料的活化能降低了 2 倍。
Doping alumina particles with aluminum alkoxides allows dense spark plasma sintered (SPSed) materials to be obtained that have a refined grain size compared to pure materials, which is critical for their transparency. An optical model considering pore and grain size distributions has been developed to obtain information about porosity in dense materials. This work suggests that the atomic diffusion mechanisms do not depend on the sintering technique. A reduction in the activation energy by a factor of 2 has been found in SPSed materials.