STUDY OF FEEDSTOCK PREPARATION AND DEBINDING PROCESS OF INJECTION MOULDED HIP STEM Co-Cr-Mo ALLOY POWDER USING WAX BASED BINDER

Omar, Mohammed; Abdullah, Noorsyakirah; Sauti, Rosliza; Ismail, Fauzi; Zainon, Nurazilah Mohd; Baharuddin, Mohd Yusof

doi:10.21908/jit.2014.6

Cited by 1 publication

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The test samples were thermally debind successfully at 450 °C and dwell time of 1hr. The reason of selecting this temperature was a complete decomposition of binder in the previous study occurred at similar temperature [5][6][7]. Five different heating rates were used from 0.1 ºC/min to 10 ºC/min to select for thermal pyrolysis process.…”

Section: Resultsmentioning

confidence: 99%

Metal Injection Moulding of Hip Stem CoCrMo Alloy Powder Using Palm Stearin Binder System

Omar

Abdullah

Sauti

et al. 2016

AMR

View full text Add to dashboard Cite

Metal Injection Moulding (MIM) has undergone development of various binder systems with the aims of shortening the overall debinding time duration. In the present work, binder system based on biopolymer has been utilised in injection moulding of hip stem CoCrMo alloy powder. The feedstock consisted of CoCrMo powder with mean diameter particle size of 16μm and binder system which comprised of major fraction of wax and minor fraction of polyethylene. The moulded part was immersed into n-heptane at 60°C in order to remove the paraffin wax and stearic acid, followed by sintering in a controlled vacuum atmosphere. Results showed that solvent extraction debinding technique allowed complete removal of paraffin wax and stearic acid from the injection moulded part within 5 hours without swelling or distortion of the debound part. Lower heating rate needed during thermal pyrolysis in order to retain the shape due to the thickness of the part.Keywords: CoCrMo, MIM, wax, debinding,

show abstract

Section: Resultsmentioning

confidence: 99%