Ion Implantation Metallurgy: A Study of the Composition, Structure and Corrosion Behavior of Surface Alloys Formed by Ion Implantation

摘要

The ion implantation technique was used in order to improve the surface mechanical properties and corrosion resistance of iron and steel. Nitrogen implantation was found to improve the fatigue lifetime and cavitation resistance of 1018 steel. TEM and internal friction studies were carried out in order to determine the nature of this strengthening mechanism. Phosphorous implantation into 304 stainless steel was shown to produce a microcrystalline surface alloy saturated with P. Combined electrochemical and XPS studies revealed that the general corrosion of 304 in deaerated 1N H2SO4 is improved, this effect being due to the formation of a modified passive film. Finally, a study is reported of the radiation effects resulting from the ion implantation AS(+)yields Au and Fe(+) yields Al. The resulting surface alloys were studied using HVEM.