Flowability

Physical property of a powder

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:[1][2]

  • 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]

See also

  • Fluid mechanics
  • Soil mechanics
  • Cohesion (geology)
  • angle of repose

References

  1. ^ a b Karolina Szulc, Andrzej Lenart (2009). "WŁAŚCIWOŚCI KOHEZYJNE WYBRANYCH PROSZKÓW SPOŻYWCZYCH" [Cohesive properties of chosen edible powders] (PDF) (in Polish). Warsaw University of Life Sciences.
  2. ^ "Badanie własności proszków" [Examining properties of powders] (PDF) (in Polish).
  3. ^ "ISO 4490:2014". ISO. Retrieved 2022-11-21.