Eventos Anais de eventos
COBEF 2021
11th Brazilian Congress on Manufacturing Engineering
FABRICATION OF NIOBIUM SILICIDE BASED MATERIALS WITH POWDER PLASMA TRANSFERRED ARC
Submission Author:
Eloisa Cardozo , PR
Co-Authors:
Eloisa Cardozo, Ana Sofia D'Oliveira
Presenter: Eloisa Cardozo
doi://10.26678/ABCM.COBEF2021.COB21-0223
Abstract
The low fabricability and poor oxidation resistance challenge research and development on Niobium and Niobium alloys since the golden age of the refractory metals, in the 50’s. The difficulties in fabricating these materials by conventional processes challenged their application and reduced competitiveness compared to the other available high temperature materials. However, with the event of Additive Manufacturing (AM), together with new software and computational methods, make the manufacture of Niobium based refractory components increasingly viable. Furthermore, in-situ synthesis of low toughness compounds during the deposition of mixtures of elemental powders might bring an alternative route to process additive manufactured refractory alloys parts. The literature requires more studies exploring the potential of additive techniques as a path to process Niobium and Niobium alloys. This study explores the fabricability of Niobium Silicide alloys by Powder Plasma Transferred Arc (PTA-p) and extrapolates the developed procedures to additive manufacture. The aim is to simultaneously perform the in-situ synthesis of the material and the manufacturing of the component. Results revealed that in-situ alloying was successfully achieved during the multilayer deposition of elementary powder mixtures. The correlation between processing and microstructure of multilayers was assessed and discussed aiming at defining processing conditions for Nb silicide based materials.
Keywords
Additive manufacturing, niobium, in-situ synthesis, Fabrication
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