TY  - JOUR
AB  - Purpose This study aims to experimentally investigate the effect of the powder material characteristics on the qualities of the binder jetting additive manufacturing parts both before and after post processing (sintering).Design methodology/approach Three different types of the 316L stainless steel powder feedstock with various mean particle sizes and size distributions were studied. The influence of the powder particle size distributions and pore sizes on the powder bed packing densities and on the dynamics of the binder droplet-powder bed interactions were characterized. In addition, the surface roughness and densities of these parts both in the green state and after sintering were studied.Findings The results revealed the significant role of the powder feedstock characteristics on the liquid binder/powder bed interaction and consequently on the dimensional accuracies of the green parts. It was observed that the parts printed with the smaller mean particle sizes resulted in better surface finish and higher final densities after sintering. Furthermore, the hardness of the sintered parts produced with smaller powder particles exhibited higher values compared to the parts fabricated with the larger particles. On the other hand, larger particle sizes are advantageous for various green part qualities including the dimensional accuracies, green part densities and surface roughness.Originality/value This study establishes more comprehensive correlations between the powder feedstock characteristics and various quality criteria of the printed binder jetting components in both green and sintered states. These correlation are of critical importance in choosing the optimal process parameters for a given material system.
VL  - 25
IS  - 2
SN  - 1355-2546
DO  - 10.1108/RPJ-03-2018-0069
UR  - https://doi.org/10.1108/RPJ-03-2018-0069
AU  - Miyanaji Hadi
AU  - Momenzadeh Niknam
AU  - Yang Li
PY  - 2018
Y1  - 2018/01/01
TI  - Effect of powder characteristics on parts fabricated via binder jetting process
T2  - Rapid Prototyping Journal
PB  - Emerald Publishing Limited
SP  - 332
EP  - 342
Y2  - 2024/04/26
ER  -