Microstructural design of Al2O3-SiC nanocomposites by Spark Plasma Sintering

作者：Alvarez I; Torrecillas R; Solis W; Peretyagin P; Fernandez A^*

来源：Ceramics International, 2016, 42(15): 17248-17253.

DOI：10.1016/j.ceramint.2016.08.019

• Sintering
• Structural ceramics
• Grain growth
• Ceramic composites
• Microstructural design
• Spark Plasma Sintering

Alumina silicon carbide composites have been traditionally considered as one of the most interesting materials to be used for structural applications at high temperatures. The SiC nanoparticle content and its distribution in the alumina matrix are parameters of extreme importance controlling the operating deformation mechanisms at high temperature. Then, the processing of tailor-made microstructures is still challenging in order to find an optimal material.
Full dense alumina-nano silicon carbide composites were prepared by using Spark Plasma Sintering at relative low temperatures and sintering times. In this work, different composite microstructures with different SiC content and type of starting alumina powder were obtained by increasing the sintering temperature and dwell time. Different ratios of inter/intra granular alumina positions of SiC particles were controlled by a suitable selection of starting raw materials, composition and sintering conditions.

• 出版日期2016-11-15