The Effect of Powder Type and Powder Size on Dimensional Variability in PIM
Zauner, R., Heaney, D. F., Piemme, J. C., Binet, C., & German, R. (2002). The Effect of Powder Type and Powder Size on Dimensional Variability in PIM. Advances in Powder Metallurgy and Particulate Materials - 2002, Metal Powder Industries Federation, Princeton, NJ. 10.191-10.
Dimensional variability for metal powder injection molding (MIM) using 316 L grade stainless steel was investigated. This portion in the series of experiments on dimensional variation is concerned with the influence of the powder type and powder size on dimensional variability. Since particle size distribution, powder surface area, and surface chemistry vary depending on the powder used, the study parameters are known to have substantial influence on the physical properties and rheological behavior of the feedstock. Such variability originating from early process decisions carries over into final product dimensional precision and is exaggerated in the later steps of molding, debinding, and sintering. A design of experiments (DOE) approach is used to statistically investigate the effect of powder type and powder size on the variability of multiple dimensions of a typical powder injection molded component in the different stages of the PIM/MIM process.