From Pre-Alloyed Rod to Gas-Atomized Powder and SPS Sintered Samples: How the Microstructure of an Nb Silicide Based Alloy Evolves

Stefan Drawin; Virgil Malard; Anne Denquin; Jean Philippe Monchoux; Alain Couret

doi:10.4028/www.scientific.net/MSF.941.1264

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HomeMaterials Science ForumMaterials Science Forum Vol. 941From Pre-Alloyed Rod to Gas-Atomized Powder and...

From Pre-Alloyed Rod to Gas-Atomized Powder and SPS Sintered Samples: How the Microstructure of an Nb Silicide Based Alloy Evolves

Abstract:

This work investigates the evolution of the microstructure of an Nb-23Ti-20Si (at.%) based alloy, from the primary plasma-melted material that is gas-atomized towards the consolidated material (here using SPS). The nature, morphology and size of the solid solution and the various silicides are followed by SEM, EDS and EBSD. Homogenous and fine microstructures are obtained after the SPS step and are improved by a subsequent heat treatment (1500°C, 100 h). However blocky silicides, already present in the powder particles, cannot be eliminated. A better control of the primary material’s microstructure would improve the microstructure of the final material.

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Periodical:

Materials Science Forum (Volume 941)

Pages:

1264-1269

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.1264

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Online since:

December 2018

Authors:

Stefan Drawin*, Virgil Malard, Anne Denquin, Jean Philippe Monchoux, Alain Couret

Keywords:

Casting, EBSD, EDS, Gas Atomization, Heat Treatment, Intermetallic, Microstructure, Niobium, Niobium Silicide, Powder Metallurgy, SEM, Spark Plasma Sintering

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References

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