Search: WFRF:(Bergström L)
> (2005-2009) >
Friction and adhesi...
Friction and adhesion of single spray-dried granules containing a hygroscopic polymeric binder
-
- Andersson, KM (author)
- RISE,YKI – Ytkemiska institutet,Stockholms Universitet
-
- Bergström, L (author)
- Stockholms Universitet
-
(creator_code:org_t)
- 2005
- 2005
- English.
-
In: Powder Technology. - 0032-5910 .- 1873-328X. ; 155, s. 101-107
- Related links:
-
https://urn.kb.se/re...
Abstract
Subject headings
Close
- The atomic force microscope has been used to study the friction and adhesion of single spray dried granules containing a mixture of fine tungsten carbide and cobalt powders and various amounts of a polymeric binder, polyethylene glycol (PEG). The adhesion or the pull-off force and the friction force between two single granules (representing intergranular friction) and between a granule and a hard metal substrate (representing die-wall friction) have been determined as a function of relative humidity. We found that the granule-wall friction increases with binder content and relative humidity. The small friction force at the lowest addition of PEG was related to a small contact area due to the high surface roughness of the granules. The substantial increase in the friction coefficient at PEG-addition>1wt% was related to the plasticity of the binder-rich granule surface where an increase in binder content or relative humidity increases the deformability. The granule-granule friction and adhesion is independent of the relative humidity and substantially lower than the granule-wall friction at all PEG contents, which has important implications for the handling of granular matter
Keyword
- Friction
- granule
- PEG
- hard metal
- pressing
- AFM
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database