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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 1    February 2001

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Novel PEG-based binder system and its debinding properties for MIM
LI Du-xin(李笃信),QU Xuan-hui(曲选辉),HUANG Bai-yun(黄伯云),
ZHONG Xiao-xian(钟孝贤),LI Song-lin(李松林),LI Yi-min(李益民)

State Key Laboratory for Powder Metallurgy,
Central South University,Changsha 410083, P.R.China

Abstract:Binder system is critical to the success of metal injection molding(MIM). A novel PEG-based binder for MIM was developed, which was made of high density polyethylene (HDPE), polyethylene glycol (PEG), polymer W, stearic acid(SA) and dioctyl phthalate (DOP). The components of binder have interactions with each other, so the binder have good compatibility. The thermal decomposition process of binderexhibits three stages during debinding. The binder could be debound by pyrolysis or solvent, and could easily be removed in a short time in ethanol without defects and evironmental concern. A lot of interconnected pores formed after solvent debinding, which is helpful to the escape of pyrolysis gases during subsequent thermal debinding or presintering.

 

Key words:   metal injection molding; binder; debinding

ISSN 1672-7029
CN 43-1423/U

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