Resumo de eventos cient??ficos
Tribological evaluation of CoCrMo alloy for biomedical applications
Registro en:
0000-0002-1304-2117
Autor
PIERETTI, EURICO F.
NEVES, MAURICIO M. das
CORREA, OLANDIR V.
ANTUNES, R.A.
BRAZIL MRS MEETING, 18th
Resumen
The tribological behavior of the CoCrMo alloy was evaluated in the air in a
nanotribometer. The chemical composition, microstructure and mechanical
properties of CoCrMo alloys makes them potential materials for use as
implantable medical or dental devices [1]. This work has a specific focus on
covering the possible in vitro wear modes seen on metal-on metal surfaces. Ballcratering
wear test was carried out for 10 min with a solid sphere of WC as
counterbody, at a frequency of 75 rpm [2]. The CoCrMo samples??? citotoxicity was
analyzed in order to determine if the alloy casting process and its surface
finishing, current used in industry, affects the biomaterial???s biocompatibility. All
tested surfaces were prepared according to the recommendations for clinical use.
The results address the potential detrimental effects of hard particles in vivo such
as increased wear rates (debris generation), which is greatly influenced by the
normal force, and corrosion (metal-ion release). None sample was considered
cytotoxic.