Optimisation of eco-friendly binary binder system for powder injection moulding |
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Authors: | C Abajo J Hidalgo A Jiménez-Morales J M Torralba |
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Affiliation: | 1. Materials Science and Engineering DepartmentUniversidad Carlos III. Avda. Universidad, 30, 28911 Leganés, Madrid, Spaincabajo@pa.uc3m.es;3. Materials Science and Engineering DepartmentUniversidad Carlos III. Avda. Universidad, 30, 28911 Leganés, Madrid, Spain;4. IMDEA Materials Institute, Madrid, Spain |
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Abstract: | AbstractIn recent years, many efforts have been made to obtain more environmentally acceptable powder injection moulding processes. In this sense, the purpose of this study is to optimise an eco-binder based on polyethylene glycol (PEG) as a water soluble component and cellulose acetate butyrate (CAB) as a natural backbone polymer derived from cellulose for powder injection moulding of zirconium silicate powders until a solvent debinding stage. Four different feedstocks have been investigated. As well as, a volume fraction of PEG and CAB 70/30 (vol.-%) and a solid loading of 57·5 (vol.-%) were maintained, molecular weights of polymers were combined in order to minimize distortion during binder solvent extraction. Water solvent debinding was carried out at three temperatures stepwise during 5 h. As a result, efficient removal of the PEG as well as free defects samples were obtained after solvent debinding for binder systems based on low molecular weight of PEG. |
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Keywords: | Water solvent debinding Polyethylene glycol (PEG) Cellulose acetate butyrate (CAB) Zircon (zirconium silicate) Rheology Powder injection moulding Molecular weight |
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