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The effect of powder characteristics on pressure sensitivity of powder injection moulding compounds
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SYSNO ASEP 0351791 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The effect of powder characteristics on pressure sensitivity of powder injection moulding compounds Author(s) Hausnerová, B. (CZ)
Sedláček, T. (CZ)
Filip, Petr (UH-J) ORCID, RID, SAI
Sáha, P. (CZ)Number of authors 4 Source Title Powder Technology. - : Elsevier - ISSN 0032-5910
Roč. 206, č. 3 (2011), s. 209-213Number of pages 5 s. Language eng - English Country CH - Switzerland Keywords pressure sensitivity coefficients ; modified capillary rheometer ; particle size distribution ; PIM technology ; carbide powder ; binder Subject RIV BK - Fluid Dynamics R&D Projects GA103/08/1307 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000286299200001 DOI 10.1016/j.powtec.2010.08.065 Annotation Pressure effect on the rheological behaviour of powder–polymer compounds intended for powder injection moulding was determined. A single-piston capillary rheometer modified by addition of a second chamber with a restricting needle valve generating backpressure increasing the pressure in the melted material during the flow through the die was employed to determine pressure sensitivity coefficients. The results obtained for three compounds varying in the characteristics of powders used confirmed that compounds at the loading level close to the maximum packing are more sensitive to pressure than polymer binder. It is shown that pressure sensitivity coefficients of these materials are strongly dependent on powder characteristics - particle size and particle size distribution. The highest coefficient (32.9 GPa−1) was found for compound containing broad particle size distributed powder having a perceptible portion of small particles. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2011
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