Characterization of Co-Cr-Mo (F-75) Alloy Produced by Solid State Sintering

Abstract

This research was carried out to fabricate and characterize Co-Cr-Mo (F-75) alloy. The samples have been prepared via solid state sintering. The lab work comprises the mixing of F-75 alloy powder with 2 wt. % of binder. The mixture was cold compacted using uniaxially press at 500 MPa. The samples were sintered at three different temperatures (1250 °C, 1300 °C and 1350 °C) in inert environment for 90 minutes of sintering time. The sintered samples were characterized by using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS) and optical microscope (OM) Olympus BX41M. Bulk density, apparent porosity, percentage of linear shrinkage, and microhardness of the samples were also characterized. The average of the grain sizes were measured by line intercepts method. The optical micrographs showed the difference grain size in all sintered samples after etching with Marble reagent. The result shows the percentage of linear shrinkage, bulk density value and porosity increase with increasing the sintering temperature. Beside that, higher sintering temperature yields coarser grain structure.

Tribological performance and corrosion behavior of CoCrMo alloy

“…This fact leads to porosity reduction and automatically affects hardness. The hardness result from our samples is greater than that obtained from Zuraidawani Che Daud et al [16]. The highest rate in terms of porosity is obtained from a sample sintered at 1200°C.…”

Fabrication of a New Series of Quaternary Alloys through Hybrid Phase Sintering

“…Suresh et al [17] have reported that the iron powders with an average particle size in the range of 2 to 150 microns show a linear relationship between green density and pressure. Daud et al [18] have reported that the grains and bulk density increase with increasing sintering temperature and sintering times. However, opposite results were obtained for apparent porosity, hardness and compressive strength, while Dixit et al [10] have reported that the compaction pressure highly influences the pore size as well as the number of pores.…”