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Debinding Process Using Supercritical Fluids in Metal Powder Injection Molding

분말사출성형에서 초임계유체를 이용한 탈지공정

  • 김용호 (한국과학기술연구원 초임계유체연구실) ;
  • 임종성 (한국과학기술연구원 초임계유체연구실) ;
  • 이윤우 (한국과학기술연구원 초임계유체연구실) ;
  • 박종구 (한국과학기술연구원 세라믹공정센터)
  • Published : 2003.02.01

Abstract

The purpose of the present study is to investigate the method decreasing debinding time as well as lowering operation condition than pure supercritical $CO_2$ debinding by using cosolvent or binary mixture of propane + $CO_2$. First method is to add cosolvent, such as n-hexane, DCM, methanol, 1-butanol, in supercritical $CO_2$. In case of adding cosolvent, we were found the addition of non-polar cosolvent (n-hexane) improves dramatically the binder removal rate (more than 2 times) compared with pure supercritical $CO_2$ debinding, second method is to use mixture of supercritical propane + $CO_2$, as solvent. In case of using mixture of supercritical propane + $CO_2$, the rate of debinding speeded up with increasing of pressure and concentration of propane at 348.15 K. It was found that addition of cosolvent (e.g., n-hexane, DCM) and binary mixture propane + $CO_2$ for supercritical solvent remarkably improved binder removal rate for the paraffin wax-based binder system, in comparison with using pure supercritical $CO_2$.

Keywords

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