Flowability, also known as powder flow is a property that defines an ability of a powdered material to flow, related to cohesion.1
Powder flowability depends on many traits:12
- the shape and size of the powder particles due to intermolecular force,
- porosity
- electrostatic activity
- hygroscopy
- bulk density
- angle of repose
- presence of glidants
- oxidation rate (of a metallic powder)
- humidity
ISO 4490:2018 norm (and its precedent, ISO 4490:2014) standardizes a method for determining the flow rate of metallic powders. It uses a normalized/calibrated funnel, named Hall flowmeter.3
References
References
- Karolina Szulc, Andrzej Lenart (2009). "WŁAŚCIWOŚCI KOHEZYJNE WYBRANYCH PROSZKÓW SPOŻYWCZYCH" [Cohesive properties of chosen edible powders] (PDF) (in Polish). Warsaw University of Life Sciences.
- "Badanie własności proszków" [Examining properties of powders] (PDF) (in Polish).
- "ISO 4490:2014". ISO. Retrieved 2022-11-21.