Number of the records: 1
Optimization of powder injection molding of feedstock based on aluminum oxide and multicomponent water-soluble polymer binder
- 1.
SYSNO ASEP 0360644 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optimization of powder injection molding of feedstock based on aluminum oxide and multicomponent water-soluble polymer binder Author(s) Hausnerová, B. (CZ)
Marcaníková, L. (CZ)
Filip, Petr (UH-J) ORCID, RID, SAI
Sáha, P. (CZ)Source Title Polymer Engineering and Science. - : Wiley - ISSN 0032-3888
Roč. 51, č. 7 (2011), s. 1376-1382Number of pages 7 s. Language eng - English Country US - United States Keywords powder injection molding ; viscosity ; thermogravimetric analysis 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 000292116900016 DOI 10.1002/pen.21928 Annotation Analyses crucial to optimize powder injection molding of feedstock based on aluminium oxide powder and multicomponent polymeric binder are provided with the aim to obtain defect-free, high density parts.As the critical step of the process is the flow of highly filled (60 vol.%) compound into a mold cavity, rheological properties supplemented by thermal and pressure-volume-temperature characteristics are measured and described.Upon shear deformation the feedstock undergoes structural changes, which are quantified in terms of yield stresses obtained using Herschel-Bulkley and Casson models.Further, the rheological model is developed to describe the flow behaviour of the feedstock in the whole shear rate range measured.Thermogravimetric analysis is performed to optimize debinding step of the process, and two possible ways of the binder removal are proposed – purely thermal and combined solvent/thermal.The quality of the final sintered parts is demonstrated on SEM images of their surfaces. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2012
Number of the records: 1