Tribological Properties of Boronized Chromium for Biological Applications

Abstract

Biomaterials being natural or man-made are crucially important for comprising whole or part of living structures. In order to prolong the service life of biomaterials is of vital importance. In this research, the tribological properties of boronized chromium were investigated. Boronizing heat treatment was performed in a solid medium by using Ekabor powders at 940 degrees C for 2, 4, 6 and 8h. Pin-on-disc tribometer was used to conduct the wear and friction tests under a load of 5N. Experiments were conducted in dry conditions as well as in simulated body liquid (SBF). Fundamental aspects of wear mode and lubrication behaviour were studied using surface characterization technique such as TEM, and X-ray diffraction. Results revealed evidence of tribo-chemical interactions between SBF and work piece materials.