Sintering of biocompatible P/M Co–Cr–Mo alloy (F-75) for fabrication of porosity-graded composite structures

Dourandish, M.; Godlinski, Dirk; Simchi, A.; Firouzdor, Vahid

doi:10.1016/j.msea.2007.03.043

Cited by 72 publications

(38 citation statements)

References 15 publications

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“…High biotolerance of the cobalt alloys are caused by the passive layer created on their surface [3][4][5]. The use of chromium as an alloy additive affects the spontaneously forming chromium oxide, which is the main component forming the passive layer.…”

Section: Introductionmentioning

confidence: 99%

Application of thermal analysis in the selection of polymer components used as a binder for metal injection moulding of Co–Cr–Mo alloy powder

Matula

Tomiczek

Król

et al. 2018

J Therm Anal Calorim

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To produce the polymer-powder slurry for injection moulding the thermoplastic polymers such as polypropylene, highdensity polyethylene and ethylene-vinyl acetate were used. Depending on skeletal polymers, in every feedstock paraffin wax (PW) was used in the amount of 50% of binder. Application of PW gives the possibility using solvent debinding or thermal debinding at a lower temperature. Then the open porosity into the injected samples reduces the time of thermal debinding of binder residue. Application of one type of skeletal polymer requires using a long isothermal step. The use of a blend of skeletal polymers enables subsequent thermal degradation which consecutively removes skeletal polymers during the heating to the sintering temperature, to minimise the time of isothermal stops. The rheological properties of blends used as a binder and next feedstocks were investigated during mixing in the twin-screw extruder and capillary rheometer. This results gives the information about the possibility to produce feedstocks and then to their injection moulding. Thermal behaviour of samples was determined by differential scanning calorimetry and thermogravimetric analysis to obtain the information about the temperature of mixing the polymers and to propose the thermal debinding cycle.

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Section: Introductionmentioning

confidence: 99%

Application of thermal analysis in the selection of polymer components used as a binder for metal injection moulding of Co–Cr–Mo alloy powder

Matula

Tomiczek

Król

et al. 2018

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…Nowadays, different materials such as stainless steel, Co and Ti based alloys have emerged to produce the next generation of biomedical implants [1][2][3][4][5][6] . One of the major problems to overcome is to reduce or to accommodate the mechanical properties, as they are most of the time higher than those found in human bones.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the compressive behavior of porous Ti6Al4V by X-ray microtomography

et al. 2017

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Samples with 40% vol. of pores and a pore size distribution between 100 and 500 µm were produced by powder metallurgy from Ti6Al4V alloy powders. Sintering was performed at 1300 °C during one hour in an inert Argon atmosphere in a vertical dilatometer. The compressive strength and the porosity of these samples was investigated before and after compression tests through X-ray microtomography. The values of the elastic modulus (8GPa) and yield strength (80MPa) are within the range of those used in bone implants. Porosity leads to greater deformation whereas fracture of compacts occurs perpendicularly to the applied load. It was determined that the origin of the failure is generated by rupture of interparticle necks and, large pores enhance the propagation of cracks.

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“…At present, 3DP was used to fabricate complex shaped ceramic of Al 2 O 3 /Cu-O [6], Ti 3 SiC 2 [9], TiAl 3 /Al 2 O 3 [10], et al However, because of low density, the 3D printed ceramic green bodies have large sintered shrinkage rate [11][12][13][14], which could result in difficulties to control the dimensional accuracy of 3D printed ceramic parts. In order to decrease sintered linear shrinkage of ceramic parts, it is desirable to develop a novel and effective method to improve the density of 3D printed ceramic green parts.…”

Section: Introductionmentioning

confidence: 99%