Abstract
This study investigates the impact of capillary adhesion force on the green part density in metal powder binder jetting 3D printing. Gas atomized Co-Cr-Mo, SS316L, and pure Cu powders were used to print various samples. The printed samples were then treated with water, 1-Hexanol, and n-Amyl alcohol vapor for 24 hours to nucleate capillary bridges between particles and shrink samples uniformly. The volume change was calculated for each sample, and up to –3.1 % volume change was observed. The proposed method can be used to improve green part densities directly on printed parts before sintering.
Reference15 articles.
1. A. M. Elliott, C. L. Cramer, P. Nandwana, M. Chmielus, and A. Mostafaei, “Binder Jet-Metals,” Reference Module in Materials Science and Materials Engineering, Vol. 1, 2021.
2. Michael Freeman, “Overcoming cost barriers of metal-binder-jet additive-manufacturing for automotive product applications,” 2022.
3. “GKN additive to showcase award-winning metal binder jetting mass production capabilities at Formnext 2022.” GKN Powder Metallurgy. https://www.gknpm.com/en/news-and-media/news-releases/2022/gkn-additive-to-showcase-award-winning-metal-binder-jetting-mass-production-capabilities-at-formnext-2022/ (accessed 2022).
4. M. Li, W. Du, A. Elwany, Z. Pei, and C. Ma, “Metal binder jetting additive manufacturing: A literature review,” Journal of Manufacturing Science and Engineering, Vol. 142, No. 9, pp. 1–17, Sep. 2020, https://doi.org/10.1115/1.4047430
5. S. Bafaluy Ojea, J. Torrents-Barrena, M. T. Pérez-Prado, R. Muñoz Moreno, and F. Sket, “Binder jet green parts microstructure: advanced quantitative analysis,” Journal of Materials Research and Technology, Vol. 23, pp. 3974–3986, Mar. 2023, https://doi.org/10.1016/j.jmrt.2023.02.051