Počet záznamů: 1

Optimization of powder injection molding of feedstock based on aluminum oxide and multicomponent water-soluble polymer binder

  1. 1.
    0360644 - UH-J 2012 RIV US eng J - Článek v odborném periodiku
    Hausnerová, B. - Marcaníková, L. - Filip, Petr - Sáha, P.
    Optimization of powder injection molding of feedstock based on aluminum oxide and multicomponent water-soluble polymer binder.
    Polymer Engineering and Science. Roč. 51, č. 7 (2011), s. 1376-1382 ISSN 0032-3888
    Grant CEP: GA ČR GA103/08/1307
    Výzkumný záměr: CEZ:AV0Z20600510
    Klíčová slova: powder injection molding * viscosity * thermogravimetric analysis
    Kód oboru RIV: BK - Mechanika tekutin
    Impakt faktor: 1.302, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0198145
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