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Friction and adhesi...
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Andersson, KMRISE,YKI – Ytkemiska institutet,Stockholms Universitet
(author)
Friction and adhesion of single spray-dried granules containing a hygroscopic polymeric binder
- Article/chapterEnglish2005
Publisher, publication year, extent ...
Numbers
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LIBRIS-ID:oai:DiVA.org:ri-27395
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https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-27395URI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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A1672
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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
Subject headings and genre
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Friction
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granule
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PEG
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hard metal
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pressing
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AFM
Added entries (persons, corporate bodies, meetings, titles ...)
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Bergström, LStockholms Universitet
(author)
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RISEYKI – Ytkemiska institutet
(creator_code:org_t)
Related titles
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In:Powder Technology155, s. 101-1070032-59101873-328X
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