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On Metal Powder Tribocharging and Humidity Adsorption
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Process.ORCID iD: 0000-0001-6204-0356
Swerim AB, Kista, Sweden.
Granutools, Liege, Belgium.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Process.ORCID iD: 0000-0002-6339-4612
2022 (English)In: World PM 2022 Congress Proceedings, European Powder Metallurgy Association (EPMA) , 2022Conference paper, Published paper (Refereed)
Abstract [en]

In this work, three characterization techniques were applied to a set of alloys in fine powder form (TiAl6V4, AlSi10Mg, AlSi7, 316L, ferritic stainless steel, martensitic stainless steel and WC-Co-mixes). We sought deeper understanding of response to humidity and flowability as a result of the powder alloy. Slight tribo-charging (induced and measured using a GranuCharge setup) against metal surfaces was found to occur for all alloys. Although the accumulated charge was small and dissipated quickly. Greater charging occurs if the environment is humid, and if the powder slides against plastic surfaces. Dynamic Vapor Sorption (DVS) was employed to understand the adsorption capacity of powders. It showed that WC-Co-mixes adsorbed much more humidity than the other materials. Some alloys retained some of the adsorbed mass when humidity returned to normal conditions. RPA was tested on powders during exposure to 20-98% RH, which above 80% RH caused declining flowability.

Place, publisher, year, edition, pages
European Powder Metallurgy Association (EPMA) , 2022.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-335709Scopus ID: 2-s2.0-85160778862OAI: oai:DiVA.org:kth-335709DiVA, id: diva2:1795038
Conference
World PM 2022 Congress and Exhibition, Lyon, France, Oct 9 2022 - Oct 13 2022
Note

Part of ISBN 9781899072552

QC 20230907

Available from: 2023-09-07 Created: 2023-09-07 Last updated: 2023-09-07Bibliographically approved

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Marchetti, LorenzoHulme-Smith, Christopher

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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