TY - JOUR
T1 - Effect of wax composition on the injection molding of carbonyliron powder with LDPE
AU - Hsu, K. C.
AU - Lin, C. C.
AU - Lo, G. M.
PY - 1996
Y1 - 1996
N2 - The effect of waxes on the injection molding of carbonyl iron powder with low-density polyethylene (LDPE) have been examined. Four waxes, paraffin wax (PW), polyethylene wax (PEW), carnauba wax (CW) and acrawax (AW) were selected and compared. Experimental results indicated that the LDPE-rich phase was found to be separated from the wax-rich phase in the binder mixture containing AW, CW of PW, Polar AW or CW showed stronger interactions or adsorptions with iron powder than other nonpolar waxes. AW/LDPE and CW/LDPE mixtures appeared to exhibit higher viscosity, greater pseudoplasticity and lower flow activation energy than PW/LDPE and PEW/LDPE mixtures. Tensile bar specimens of all binder mixtures could be injection molded at an injection temperature of around 170-190°C, and a pressure of around 5-6 MPa. Except for the PEW/LDPE mixture the parts derived from the other three binder mixtures showed good surface appearance following debinding and sintering. Specimens based on the PW/LDPE mixture exhibited the highest tensile strength in the resulting sintered parts, followed those based on CW/LDPE, AW/LDPE, and PEW/LDPE mixtures. The difference in tensile strength of each part results from different flow properties of each wax/LDPE mixture.
AB - The effect of waxes on the injection molding of carbonyl iron powder with low-density polyethylene (LDPE) have been examined. Four waxes, paraffin wax (PW), polyethylene wax (PEW), carnauba wax (CW) and acrawax (AW) were selected and compared. Experimental results indicated that the LDPE-rich phase was found to be separated from the wax-rich phase in the binder mixture containing AW, CW of PW, Polar AW or CW showed stronger interactions or adsorptions with iron powder than other nonpolar waxes. AW/LDPE and CW/LDPE mixtures appeared to exhibit higher viscosity, greater pseudoplasticity and lower flow activation energy than PW/LDPE and PEW/LDPE mixtures. Tensile bar specimens of all binder mixtures could be injection molded at an injection temperature of around 170-190°C, and a pressure of around 5-6 MPa. Except for the PEW/LDPE mixture the parts derived from the other three binder mixtures showed good surface appearance following debinding and sintering. Specimens based on the PW/LDPE mixture exhibited the highest tensile strength in the resulting sintered parts, followed those based on CW/LDPE, AW/LDPE, and PEW/LDPE mixtures. The difference in tensile strength of each part results from different flow properties of each wax/LDPE mixture.
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U2 - 10.1016/0008-4433(95)00040-2
DO - 10.1016/0008-4433(95)00040-2
M3 - Article
AN - SCOPUS:0030126430
SN - 0008-4433
VL - 35
SP - 181
EP - 187
JO - Canadian Metallurgical Quarterly
JF - Canadian Metallurgical Quarterly
IS - 2
ER -