The Effect of Yttrium Ion Implantation on the Sulphidation of Incoloy 8ooh
ثبت نشده
چکیده
Previous work has shown the beneficial effect of yttrium implantation on the oxidation behaviour of chromium oxide forming alloys. Because of the limited applicabihty of Fe-Cr-Ni alloys in sulphur containing gases the effect of yttrium implantation on the aulphidation of Incoloy 800H was studied. In short time tests a significant improvement was observed upon implantation of about 10lh yttrium ions/cm’ if an oxidiztng treatment was applied before exposition to the sulphiding environment. The explanation of this effect is probably Gmilar to that proposed in the literature for the improved oxidation resistance.
منابع مشابه
The Sulphidatibn Properties of Pre-oxidized Yttrium-ion-implanted Incoloy 800H*
On sulphidation o f pre-oxidized yttriumimplanted Incoloy 800H an improvement in sulphidation resistance is obtained. Preoxidized krypton-implanted alloy and aluminium-implanted alloy have sulphidation rates which are about the same as that o f non-implanted pre-oxidized Incoloy 80OH. Scanning electron microscopy observations show that one o f the effects o f y t tr ium implantation is to decre...
متن کاملThe Protective Properties of Thin Alumina Films Deposited by Metal Organic Chemical Vapour Deposition against High-temperature Corrosion of Stainless Steels*
Coatings of Al20 3 were deposited on Incoloy 800H and A I S I 304 by means of metal organic chemical vapour deposition. Diffusion limitation was the rate-determining step above 420 °C. Below this temperature, the activation energy of the reaction appeared to be 3 0 k J m o l t . Coating with Ale0 3 increases the sulphidation resistance by at least 4 -10 times. The sulphidation resistance is inf...
متن کاملInfluence of Ni Deposition and Subsequent N+ Ion Implantation at Different Implantation Energies on Nano-Structure and Corrosion Behavior of 316 Stainless Steels
Nickel films of 300 nm thickness were deposited by electron beam evaporation at room temperature on 316 stainless steels. Corrosion studies of Ni coated 316 SS have been performed after N+ ion implantation at different energies of 20, 40, 60 and 80 keV. The structure and surface morphology of the films were evaluated using X-ray diffraction (XRD), atomic force microscope (AFM) an...
متن کاملThe Effects Of Interfacial Roughness On The Argon Ion Implanted Tantalum Films
In the present study, effect of interfacial roughness on the ion implanted Tantalum based surfaces has been investigated. The argon ions with energy of 30 keV and in doses of 1×1017 , 3×1017 , 5×1017 , 7×1017 , and 10×1017 (ion/cm2) have been used at ambient temperature. The Atomic Force Microscopy (AFM), analysis have been used to study and characterize the surfaces morphology. The effect of ...
متن کاملInfluence of nitrogen ion implantation on the nanostructure and corrosivity of Ni/stainless steel substrates
Ion implantation is a surface modification technology to produce new material on the surface by impingement of high energy ions from the ion accelerator. In this work, AISI 304 stainless steels were coated with 90 nm Ni film by electron beam deposition and implanted by a flow of 5×1017 N cm−2 at 400 K temperature with different implantation energies of 10, 20, 30 and 40 keV. The prepared sample...
متن کامل