New methacrylate-based feedstock systems for micro powder injection moulding
| Autor: | Kirsten Honnef, Oxana Weber, Tobias Müller, Thomas Hanemann |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Materials science Thermoplastic Rheometry Condensed Matter Physics Methacrylate Electronic Optical and Magnetic Materials chemistry Hardware and Architecture Compounding visual_art Powder metallurgy visual_art.visual_art_medium Injection moulding Cubic zirconia Ceramic Electrical and Electronic Engineering Composite material |
| Zdroj: | Microsystem Technologies. 17:451-457 |
| ISSN: | 1432-1858 0946-7076 |
| DOI: | 10.1007/s00542-011-1243-9 |
| Popis: | New methacrylate-based feedstocks have been developed according to fulfil the requirements of the micro powder injection moulding process chain, consisting of compounding, moulding and thermal post-processing for the realization of dense and warpage-free ceramic or metal parts. The different feedstock systems, consisting of polymethylmethacrylate (PMMA) as major binder component and microsized zirconia or stainless steel filler, were prepared by reactive compounding. The individual components—PMMA, solved in its monomer methylmethacrylate (MMA), additives and fillers—were mixed in a dissolver stirrer under ambient conditions and subsequently polymerized to a thermoplastic feedstock. Prior to injection moulding the mixtures’ flow properties were characterized by high pressure capillary rheometry as function of the composition, solid load and shear rate. After replication the obtained test specimen were debinded and sintered using optimized temperature programs. The achieved specimen densities reach 99% of the theoretical possible value for zirconia and 98.7% in case of stainless steel 17-4PH. |
| Databáze: | OpenAIRE |
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