Environmentally friendly solvent debinding technique of POM binder system for titanium injection molding

An environment-friendly solvent debinding process for polyoxymethylene (POM) for metal injection molding (MIM) is presented as an alternative to the traditional catalytic debinding method. This study investigated the influence of various acid solvents and debinding temperature. The optimal debinding...

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Bibliographic Details
Published inJournal of materials research and technology Vol. 30; pp. 1037 - 1043
Main Authors Lim, Keemi, Hayat, Muhammad Dilawer, Jena, Kumar Debajyoti, Zhang, Wen, Yuan, Zhentao, Li, Lu, Cao, Peng
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2024
Elsevier
Subjects
Environmentally friendly
Metal injection molding
Polyoxymethylene (POM)
Solvent debinding
Titanium MIM
Polyoxymethylene (POM)
Environmentally friendly
Metal injection molding
Solvent debinding
Titanium MIM
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Summary:An environment-friendly solvent debinding process for polyoxymethylene (POM) for metal injection molding (MIM) is presented as an alternative to the traditional catalytic debinding method. This study investigated the influence of various acid solvents and debinding temperature. The optimal debinding parameters were 5 M nitric acid solution at 60 °C. Based on the calculation of effective diffusivity and activation energy, the solvent-debinding mechanism for POM is proposed. The removal of POM was controlled by three processes: dissolution, diffusion, and chemical reaction. The resulting final titanium parts have a high density of over 95% and an ultimate tensile strength of 406 MPa.
ISSN:2238-7854
DOI:10.1016/j.jmrt.2024.03.064