Abstract
In the present study, a new pack carburization technique for titanium has been investigated. The aim of this treatment is to produce a titanium carbide/oxycarbide layer atop of an extended oxygen diffusion zone [α-Ti(O)]. The effects of treatment temperature and pack composition have been investigated in order to determine the optimal conditions required to grant the best tribological response. The resulting structural features were investigated with particular interest in the carbon and oxygen concentrations across the samples cross section. The optimization showed that a temperature of 925 °C with a pack composition of 1 part carbon to 1 part energizer produced surface capable of withstanding a contact pressure of ≈ 1.5 GPa for 1 h. The process resulted in TiC surface structure which offers enhanced hardness (2100 HV) and generates a low friction coefficient (μ ≈ 0.2) when in dry sliding contact with an alumina (Al2O3) ball. The process also produced an extended oxygen diffusion zone that helps to improve the load bearing capacity of the substrate.
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I (RB) would like to acknowledge the financial support of De Montfort University for providing a Ph.D. scholarship. Special thanks are also due to The Alderman Newton’s Educational Foundation, The Sidney Perry Foundation, and The Wyvernian Foundation for providing additional financial support during the course of this work.
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Bailey, R., Sun, Y. An Investigation into the Effects of Process Conditions on the Tribological Performance of Pack Carburized Titanium with Limited Oxygen Diffusion. J. of Materi Eng and Perform 27, 3091–3101 (2018). https://doi.org/10.1007/s11665-018-3382-y
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DOI: https://doi.org/10.1007/s11665-018-3382-y