Authors:
S. Sainz (1,2), J. Pérez de Arriluzea (1,2), I. Iglesias (1,2), E. Cardozo (1,2), O. Ruiz (1,2), N. Ordás (1,2), I. Iturriza (1,2)
1- CEIT-Basque Research and Technology Alliance (BRTA), Spain
2- Universidad de Navarra, Tecnun, Spain
Abstract:
In sinter-based AM the printing is just a shaping process for the powder, separated from the high temperature densification step. After printing, the density of a part will be around 55-60 % TD. In addition, most of the applications need final densities higher than 95 %TD. Consequently, the sinterability of the powder is a key factor that has to be carefully studied. Solid state or liquid phase sintering, thermal profile, interaction with the sintering atmosphere, reduction of superficial oxides, compositional homogeneity, shrinkage … need to be studied for each powder grade. Solid State Sintering is effective at relatively high temperatures for materials like Cu and its alloys whereas Liquid Phase Sintering allows reducing sintering temperature and opens different scenarios for the AM BJ massive production of metal parts. These alternatives are discussed in the present paper together with an in-depth microstructural characterization.
DOI:
https://doi.org/10.59499/EP246301454
