Ahmed, M, Pasha, M, Nan, W et al. (1 more author) (2020) A simple method for assessing powder spreadability for additive manufacturing. Powder Technology, 367. pp. 671-679. ISSN 0032-5910
Abstract
Additive manufacturing based on powder spreading is attracting great interest, but one key weakness is that narrow gaps used for spreading produce non-uniformity in the spread layer due to transient jamming. We propose a simple technique for assessing the powder spreadability, a measure of the ease with which a powder is spread uniformly without the formation of empty patches. A cutter blade, with a segment cut along its length to produce a gap, is used to manually spread a small heap of powder. The frequency of formation of empty patches and their size, which are a manifestation of jamming as the particles are spread, are analysed for several gap heights. The sizes of the empty patches and frequency of their formation are determined by image analysis. The outcomes correlate well with a Discrete Element Method simulation of the same system. A criterion is proposed for diagnosing the empty patch formation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Powder spreading; Spreadability; Additive manufacturing; Empty patches; Jamming; Feedstock |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/N025261/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Apr 2020 15:13 |
Last Modified: | 24 Feb 2025 11:15 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.powtec.2020.04.033 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:159437 |