Using fine metal powders, we were able to fabricate dense P/M (powder metallurgy) products by a three-dimensional inkjet printing system. We used carbonyl nickel powder with a mean particle size of 5 μm as a raw material and examined two binder supply methods: (i) supplying a binder directly from the inkjet head (DB method), and (ii) coating the powder with a water-soluble polymer and then supplying thin polymer-dissolved water from the inkjet head (CB method). The layered green product was sintered in a hydrogen atmosphere at a temperature in the range of 1073-1623 K. Sintered samples fabricated by the CB method had non-uniform microstructure due to agglomeration of the coated powder. In samples made by the DB method, the macroscopic shape was retained after high-temperature sintering at 1623 K, and a high density of over 90% was achieved, which was attributed to uniform powder cohesion in the laminating process. © 2005 The Japan Institute of Metals.
CITATION STYLE
Kakisawa, H., Minagawa, K., Ida, K., Maekawa, K., & Halada, K. (2005). Dense P/M component produced by solid freeform fabrication (SFF). In Materials Transactions (Vol. 46, pp. 2574–2581). https://doi.org/10.2320/matertrans.46.2574
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