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TECHNICAL BRIEFS

A Tribological Comparison of Pure and Boronized Chromium

[+] Author and Article Information
R. Ribeiro, S. Ingole

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

M. Usta

Department of Materials Science and Engineering, Gebze Institute of Technology, 41400 Gebze/Kocaeli, Turkey

C. Bindal

Engineering Faculty, Department of Metallurgical and Materials Engineering, Sakarya University, 54187 Esentepe Campus, Sakarya, Turkey

A. H. Ucisik

Institute of Biomedical Engineering, Department of Prostheses, Materials and Artificial Organs, Bogazici University, 80815, Bebek/Istanbul, Turkey

H. Liang1

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123hliang@tamu.edu

1

Corresponding author.

J. Tribol 128(4), 895-897 (Jun 17, 2006) (3 pages) doi:10.1115/1.2345417 History: Received August 04, 2005; Revised June 17, 2006

Boronized metals are potential candidate materials for various industrial applications as well as for joint arthroplasty. This is due to their high hardness and corrosion resistance. In the present research, we investigated the tribological performance of boronized chromium when worn against bearing steel E52100. Pure chromium was used as a control material and tested under similar conditions. Three test conditions were used—dry sliding, with water, and with simulated body fluid (SBF). The highest coefficient of friction obtained was for chromium boride under dry sliding conditions. Water and SBF acted as lubricants and lowered the coefficient of friction. The friction coefficient for Cr and chromium boride was lowest under SBF conditions. SEM analysis showed that the wear modes were different under different test conditions. TEM analysis showed a layered-like structure of debris that could have acted as a lubricant and caused a very low friction coefficient as the tests progressed.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

(a) Coefficient of friction against number of cycles for pure chromium. (b) Coefficient of friction against number of cycles for chromium boride.

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Figure 2

(a) SEM images of the wear tracks for dry tests. (b) SEM images of the wear tracks for the SBF condition tests.

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Figure 3

TEM images of debris obtained from SBF condition tests (inset: diffraction pattern)

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