Cost effective pack-boriding process for nickel alloys

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Creating a hard wear resistant nickel diboride layer on a nickel alloy component is a practical method to improve**its mechanical performance and service life. The solid-state pack boriding process is a relatively simple method to**create such a layer however it relies on a complex inter-diffusion sintering processes that is currently not**completely understood nor optimized. The objective of this research project is to study the role of boriding**powder composition, boriding temperature, atmosphere, and time on the creation of hard and adherent nickel**diboride layers on a nickel-bearing alloy substrate. The investigation will begin with first assessing the**interdiffsuion and diboride formation processes in existing commercial boride powder mixtures and then, based**upon these findings, develop an optimized boride powder composition and boriding process that will produce a**suitably strong and wear resistant nickel diboride layer on a nickel alloy stainless substrates at a reduced cost**compared to currently available processes. The broader significance of the optimized process will then be**investigated by studying its application to: i) re-boriding of nickel-based alloys, and ii) boriding of ferritic stainless**steel.