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Cohesive Powder Flow: Trends and Challenges in Characterisation and Analysis
- Source :
- KONA Powder and Particle Journal, KONA Powder and Particle Journal, Hosokawa Powder Technology Foundation, 2020, ⟨10.14356/kona.2020018⟩, KONA Powder and Particle Journal, Hosokawa Powder Technology Foundation, 2020, 37, pp.3-18. ⟨10.14356/kona.2020018⟩, KONA Powder and Particle Journal, Vol 37, Iss 0, Pp 3-18 (2019)
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; Powder processing and manufacturing operations are rate processes for which the bottleneck is cohesive powder flow. Diversity of material properties, particulate form, and sensitivity to environmental conditions, such as humidity and tribo-electric charging, make its prediction very challenging. However, this is highly desirable particularly when addressing a powder material for which only a small quantity is available. Furthermore, in a number of applications powder flow testing at low stress levels is highly desirable. Characterisation of bulk powder failure for flow initiation (quasi-static) is well established. However, bulk flow parameters are all sensitive to strain rate with which the powder is sheared, but in contrast to quasi-static test methods, there is no shear cell for characterisation of the bulk parameters in the dynamic regime. There are only a handful of instruments available for powder rheometry, in which the bulk resistance to motion can be quantified as a function of the shear strain rate, but the challenge is relating the bulk behaviour to the physical and mechanical properties of constituting particles. A critique of the current state of the art in characterisation and analysis of cohesive powder flow is presented, addressing the effects of cohesion, strain rate, fluid medium drag and particle shape.
- Subjects :
- characterisation
Materials science
General Chemical Engineering
flowability
02 engineering and technology
[SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]
Shear cell
020401 chemical engineering
lcsh:Technology (General)
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
spreadability
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
General Materials Science
0204 chemical engineering
Composite material
[SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the solides [physics.class-ph]
Rheometry
General Engineering
Humidity
General Chemistry
bulk flow
Strain rate
[PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph]
021001 nanoscience & nanotechnology
[SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the structures [physics.class-ph]
Shear strain rate
Drag
[SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Structural mechanics [physics.class-ph]
lcsh:T1-995
lcsh:QC770-798
Cohesion (chemistry)
0210 nano-technology
Material properties
additive manufacturing
cohesive powder
Subjects
Details
- Language :
- English
- ISSN :
- 02884534
- Database :
- OpenAIRE
- Journal :
- KONA Powder and Particle Journal, KONA Powder and Particle Journal, Hosokawa Powder Technology Foundation, 2020, ⟨10.14356/kona.2020018⟩, KONA Powder and Particle Journal, Hosokawa Powder Technology Foundation, 2020, 37, pp.3-18. ⟨10.14356/kona.2020018⟩, KONA Powder and Particle Journal, Vol 37, Iss 0, Pp 3-18 (2019)
- Accession number :
- edsair.doi.dedup.....2aa61568e61f395acdba843dd36dee8d