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Effects of Humidity on the Flowability of Steel Powders
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer.ORCID-id: 0000-0001-6204-0356
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer.ORCID-id: 0000-0002-6339-4612
2020 (Engelska)Ingår i: Proceedings - Euro PM2020 Congress and Exhibition, European Powder Metallurgy Association (EPMA) , 2020Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Humidity and temperature can vary across the world. For this reason, during storage and processing, batches of the same powder may interact with diverse environmental conditions and eventually vary in their properties. For example, a higher atmospheric water vapour content could increase the water adsorbed on the surface of individual powder particles. This adsorbed water can alter the surface interactions between particles, affecting its flow behaviour. In this study, we measured the flow behaviour of various sieve fractions and steel powders in different environmental conditions. We set the environmental conditions in a C1000-40 climate chamber to different levels of relative humidity and temperature. The powder samples and a Freeman FT4 powder rheometer were placed in the climate chamber and equilibrated for 72h. Subsequently, we tested the flow behaviour using two different programs of the powder rheometer. Ultimately, we found that powder flowability is adversely affected by increased humidity.

Ort, förlag, år, upplaga, sidor
European Powder Metallurgy Association (EPMA) , 2020.
Nyckelord [en]
Compressive strength, Powder metallurgy, Powders, Rheometers, Strain gages, Atmospheric water vapour content, Climate chambers, Environmental conditions, Flow behaviours, Flowability, Humidity and temperatures, Powder particles, Powder rheometers, Property, Steel powder, Atmospheric humidity
Nationell ämneskategori
Metallurgi och metalliska material
Identifikatorer
URN: urn:nbn:se:kth:diva-313919Scopus ID: 2-s2.0-85101835851OAI: oai:DiVA.org:kth-313919DiVA, id: diva2:1670143
Konferens
European Powder Metallurgy Congress and Exhibition, Euro PM 2020, 5 October 2020 through 7 October 2020, Virtual, Online
Anmärkning

QC 20220615

Part of proceedings: ISBN 978-189907251-4

Tillgänglig från: 2022-06-15 Skapad: 2022-06-15 Senast uppdaterad: 2022-06-25Bibliografiskt granskad

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Marchetti, LorenzoHulme-Smith, Christopher

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Totalt: 137 träffar
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