The effect of yttrium ion implantation on the sulphidation of incoloy 800H

Kort, J.H.; Fransen, Τ.; Gellings, P.J.

doi:10.1016/0169-4332(86)90042-5

Cited by 9 publications

(2 citation statements)

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“…CONCLUSIONS 9 Preoxidation of Incoloy 800H in a mixture of H2/H20 is very effective in reducing the sulphidation rate. 9 Yttrium-ion implantation of Incoloy 800H effectively reduces the oxidation rate and reduces the sulphidation rate if preoxidation at high Po2 is applied after implantation. 9 The observed oxidation and sulphidation behavior of yttriumimplanted Incoloy 800H may be due to the blockage of short-circuit diffusion paths.…”

Section: Plastic Deformationmentioning

confidence: 99%

High-temperature corrosion and mechanical properties of protective scales on Incoloy 800H: The influence of preoxidation and ion implantation

1990

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Coatings, obtained by preoxidation of Incoloy 800H at low P02 show good sulphidation resistance due to the higher chromia content in the oxide scale. Yttrium-ion implantation of Incoloy 800H has also a beneficial effect on sulphidation, if preoxidation is applied. The reason for this is presumably the segregation of yttrium to grain boundaries of the oxide. Furthermore, the oxidation kinetics of Incoloy 800H are independent of the partial pressure of the oxygen. Mechanical testing of the preformed oxide scale/substrate combinations in air at 600~ by means of constant-extension-rate experiments shows that preoxidation at low partial pressures of oxygen leads to earlier scalecracking.

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Section: Plastic Deformationmentioning

confidence: 99%