Spark plasma sintering of combustion-synthesized β-SiAlON powders

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 20h and was then sintered at different temperatures with heating rates varyin...

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Bibliographic Details
Published inCeramics international Vol. 42; no. 6; pp. 6707 - 6712
Main Authors Yi, Xuemei, Guo, Ran, Liu, Xiongzhang, Zhang, Weiguo, Yan, Fengxin
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2016
Subjects
A. Milling
C. SiAlON
Combustion synthesis
Spark plasma sintering
Combustion synthesis
Spark plasma sintering
C. SiAlON
A. Milling
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Summary: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 20h 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.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2016.01.038