Spark plasma sintering of combustion-synthesized β-SiAlON powders
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- 作者：Xuemei Yi ; xuemei_yi@nwsuaf.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Ran Guo ; Xiongzhang Liu ; Weiguo Zhang ; Fengxin Yan
- 关键词：A. Milling ; C. SiAlON ; Combustion synthesis ; Spark plasma sintering
- 刊名：Ceramics International
- 出版年：2016
- 出版时间：1 May 2016
- 年：2016
- 卷：42
- 期：6
- 页码：6707-6712
- 全文大小：2155 K
文摘
In this paper, the sintering behavior of β-Si6−zAlzOzN8−z (z=1) powder prepared by combustion synthesis (CS) was studied using spark plasma sintering (SPS). The CSed powder was ball milled for various durations from 0.5 to 20 h and was then sintered at different temperatures with heating rates varying from 30 °C/min to 200 °C/min. The effects of ball milling, sintering temperature, and heating rate on sinterability, final microstructure, and mechanical property were investigated. A long period of ball milling reduced the particle size and subsequently accelerated the sintering process. However, the fine powder was easily agglomerated to form secondary particles, which accordingly decreased the densification of the SPS product. The high sintering temperature accelerated the densification process, whereas the high heating rate reduced the grain growth and increased the relative density of the sintered product.