TY - GEN
T1 - Wear resistance of hard coatings in powder injection molding (PIM)
AU - Panahi, Ali Keshavarz
AU - Khoshkish, Hossein
AU - Saraji, Mostafa Rezaee
PY - 2010
Y1 - 2010
N2 - The degree of machine wear decisively determines the economic feasibility of powder injection molding. According to higher hardness of alumina powders (ca. 2000HV), manufacturing of ceramic components via PIM requires hard wear resistance equipments to overcome the wear phenomena. The wear test is based on the ASTM rubber wheel but the rubber wheel is replaced by a steel wheel of the same grade used in the barrel of an injection molding machine. The potential of hard coatings for wear protection in feedstock processing units is investigated in the present study. Model wear tests were carried out to demonstrate the tribological situation inside the screw/barrel system of extruders and injection molding machines. The substrate material was AISI 4140 steel which is used for PIM machine components. Hard coatings prepared by physical vapor deposition (PVD) and chemical vapour deposition (CVD) offer a good opportunity for wear protection. Due to higher temperature of feedstock and compression, the amount of wear in the metering zone is higher in comparison with other zones. The wear behavior also was strongly influenced by the characteristics of the feedstock (e.g. amount, size, shape and hardness of ceramic particles).
AB - The degree of machine wear decisively determines the economic feasibility of powder injection molding. According to higher hardness of alumina powders (ca. 2000HV), manufacturing of ceramic components via PIM requires hard wear resistance equipments to overcome the wear phenomena. The wear test is based on the ASTM rubber wheel but the rubber wheel is replaced by a steel wheel of the same grade used in the barrel of an injection molding machine. The potential of hard coatings for wear protection in feedstock processing units is investigated in the present study. Model wear tests were carried out to demonstrate the tribological situation inside the screw/barrel system of extruders and injection molding machines. The substrate material was AISI 4140 steel which is used for PIM machine components. Hard coatings prepared by physical vapor deposition (PVD) and chemical vapour deposition (CVD) offer a good opportunity for wear protection. Due to higher temperature of feedstock and compression, the amount of wear in the metering zone is higher in comparison with other zones. The wear behavior also was strongly influenced by the characteristics of the feedstock (e.g. amount, size, shape and hardness of ceramic particles).
U2 - 10.1115/ESDA2010-24590
DO - 10.1115/ESDA2010-24590
M3 - Conference contribution
AN - SCOPUS:79956131578
SN - 9780791849156
T3 - ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, ESDA2010
SP - 485
EP - 488
BT - ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, ESDA2010
T2 - ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, ESDA2010
Y2 - 12 July 2010 through 14 July 2010
ER -