Improved bio-tribology of biomedical alloys by ion implantation techniques

Dı́az, Cristina; Lutz, J.; Mändl, S.; Garcı́a, J.A.; Martı́nez, R.; Rodríguez, Rafael

doi:10.1016/j.nimb.2009.01.118

Cited by 26 publications

(13 citation statements)

References 21 publications

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“…Similar results have been obtained for fretting wear experiments in simulated body fluid after nitrogen PIII [11]. Looking for solutions for the migrations effects Díaz et al studied oxygen implantations and reported a dramatic reduction in concentration of toxic metals [12], coupled with moderate increases in wear resistance.…”

Section: Introductionsupporting

confidence: 69%

Tribological improvements of plasma immersion implanted CoCr alloys

Garcı́a

Dı́az

Mändl

et al. 2010

Surface and Coatings Technology

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Section: Introductionsupporting

confidence: 69%

Tribological improvements of plasma immersion implanted CoCr alloys

Garcı́a

Dı́az

Mändl

et al. 2010

Surface and Coatings Technology

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“…Quantitative depth-profiles of different elements were measured by glow discharge optical emission spectroscopy (GDOES) using a JY GD Profiler HR (Jobin-Yvon Horiba, France) RF source operating at 650 Pa and 40W discharge [36].…”

Section: Methodsmentioning

confidence: 99%

Corrosion behaviour of medical CoCr alloy after nitrogen plasma immersion ion implantation

Lutz

Dı́az

Garcı́a

et al. 2011

Surface and Coatings Technology

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Surface treatment of medical CoCr alloys L605 by nitrogen plasma immersion ion implantation (PIII) leads to the formation of a hard and wear resistant surface layer, consisting of nitrogen in solid solution. However, a detailed investigation of the corrosion properties by potentiodynamic polarization and electrochemical impedance spectroscopy shows that even at processing temperatures of 350 °C, where no CrN precipitates are observed, no complete passivation of the surface by formation of a protective Cr 2 O 3 layer is possible leading to enhanced corrosion rates further increasing with increasing PIII processing temperature. It is postulated that the enhanced affinity of chromium for nitrogen leads to a reduced mobility inside the alloy, thus prohibiting a timely surface passivation. Nevertheless, a surface modification where a moderate decrease in corrosion resistance coupled with a significant reduction in generated wear particles should be feasible for biomedical applications.

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“…However, only few publications exist about surface modifications to improve the biocompatibility of CoCr alloy: Conventional beamline nitrogen ion implantation [5], plasma surface alloying [6] and high intensity plasma ion nitriding [7] have been reported. These experiments using nitrogen or oxygen, as well as experiments with plasma immersion ion implantation (PIII) [8][9][10][11] result in an increase of the surface hardness and a reduction of wear rate. In the case of nitrogen insertion, the formation of an expanded austenitic structure at lower process temperatures and the precipitation of chromium nitrides at process temperatures above 400°C is observed.…”

Section: Introductionmentioning

confidence: 99%