Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 14, Pages 17440-17446Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.06.211
Keywords
SiAlON; Rare-earth; Diffusion; Inconel 718; Microscopy
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Funding
- Bilecik Seyh Edebali University Scientific Research Projects Commission [2016-02.BSEU.03-10]
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The utilization of SiAlON ceramics at high speed machining of superalloys has been increasing day by day. In these operations, chemical wear, based on diffusion of tool and work-piece atoms towards each other due to high temperature and pressure at the cutting zone, is the dominant tool failure mechanism. In this study, dopant-dependent diffusion behavior of SiAlON ceramics, prepared by using different rare-earth elements (Y, Yb, Er and Ce), against Inconel 718 alloy was investigated. The SiAlON-Inconel 718 diffusion couples were manufactured by SPS technique. It was observed that the diffusion zone thickness was strongly dependent on the type of the rare-earth used in the composition and Er-doped SiAlON samples had a higher interaction zone in comparison to the others. Moreover, crystallization of grain boundary phase was observed as an effective parameter on the zone thickness for Er-doped compositions.
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