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Wear Behavior of Plasma Oxidized CoCrMo Alloy under Dry and Simulated Body Fluid Conditions

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Abstract

In this study, CoCrMo alloy was oxidized in plasma environment at the temperatures of 600 °C to 800 °C for 1 h to 5 h with 100% O2 gas and its tribological behavior was investigated. After the plasma oxidizing process, the compound and diffusion layers were formed on the surface. XRD results show that Cr2O3, α-Co and ε-Co phases diffracted from the modified layers after plasma oxidizing. The untreated and treated CoCrMo samples were subjected to wear tests both in dry and simulated body fluid conditions, and normal loads of 2 N and 10 N were used. For the sliding wear test, alumina balls were used as counter materials. It was observed that the wear resistance of CoCrMo alloy was increased after the plasma oxidizing process. The lowest wear rate was obtained from the samples that were oxidized at 800 °C for 5 h. It was detected that both wear environment and load have significant effects on the wear behavior of this alloy, and the wear resistance of oxidized CoCrMo alloy is higher when oxide-based counterface is used. The wear rates of both untreated and plasma oxidized samples increase under high loads.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Engineering Faculty, Atatürk University, Erzurum, 25240, Turkey

    Ayhan Çelik, Mevra Aslan & Özgü Bayrak

  2. Department of Mechanical Engineering, Engineering and Architecture Faculty, Erzurum Technical University, Erzurum, 25700, Turkey

    Ali Fatih Yetim

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  1. Ayhan Çelik
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  2. Mevra Aslan
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  3. Ali Fatih Yetim
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  4. Özgü Bayrak
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Correspondence to Ali Fatih Yetim.

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Çelik, A., Aslan, M., Yetim, A.F. et al. Wear Behavior of Plasma Oxidized CoCrMo Alloy under Dry and Simulated Body Fluid Conditions. J Bionic Eng 11, 303–310 (2014). https://doi.org/10.1016/S1672-6529(14)60035-4

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  • DOI: https://doi.org/10.1016/S1672-6529(14)60035-4

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