A Taguchi approach to the influence of hot pressing parameters and SiC content on the sinterability of ZrB2-based composites

In this paper, the effects of the hot pressing parameters and SIC content on the densification of ZrB2-based composites have been studied. This research reports a design of experiment approach, the Taguchi method, employed to analyze the processing of ZrB2-SiC composites based on four processing parameters: the hot pressing temperature, the soaking time, the applied pressure and SiC content. In this way, an L9 orthogonal array, including nine experiments for four parameters with three levels, was used to optimize the processing factors. The analysis of variance identified the applied pressure as the most impressive parameter affecting the densification and hardness of ZrB2-SiC composites. A relative density of similar to 96% and a Vickers hardness of 15.2 GPa were achieved for ZrB2-25 vol.% SiC composite with the sintering temperature of 1850 degrees C, the soaking time of 90 min and the applied pressure of 16 MPa. The confirmation test, fulfilled under the optimal conditions, disclosed that the result of the experiment and the Taguchi prediction were alike. (C) 2015 Elsevier Ltd. All rights reserved.