Residual stress of ruthenium powder samples compacted by spark-plasma-sintering (SPS) determined by X-ray diffraction

Spark-plasma-sintering (SPS) experiments of cylindrical ruthenium powder samples have been performed at different sintering temperatures between 1200 °C and 1600 °C applying a comparatively short sintering time of 1 min. The compacted samples have been characterized in respect of crystallite size, p...

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Veröffentlicht in:International journal of refractory metals & hard materials 2009, Vol.27 (1), p.105-110
Hauptverfasser: Angerer, P., Wosik, J., Neubauer, E., Yu, L.G., Nauer, G.E., Khor, K.A.
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Sprache:eng
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Zusammenfassung:Spark-plasma-sintering (SPS) experiments of cylindrical ruthenium powder samples have been performed at different sintering temperatures between 1200 °C and 1600 °C applying a comparatively short sintering time of 1 min. The compacted samples have been characterized in respect of crystallite size, phase composition, and microstructure by X-ray diffraction and scanning electron microscopy techniques. Furthermore, the stress components σ 11 and σ 33 directed parallel and vertical to the compaction axis have been determined by means of the sin 2 ψ method. The SPS process resulted in a significant reduction of the residual stress in the material in comparison with samples compacted by conventional hot pressing methods (HP) which were compacted at 1200 °C and 1400 °C for 60 min. This effect is also associated with an enhanced crystallite growth.
ISSN:0263-4368
2213-3917
DOI:10.1016/j.ijrmhm.2008.04.002