Antiphospholipid Antibodies – Detection and Clinical Importance

Swadźba, Jakub; Kołodziejczyk, J

doi:10.5772/30530

Cited by 1 publication

(1 citation statement)

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“…"Co-doping" -the idea of using more than one dopant is a promising way for improvement of oxidation resistance of coatings [11,15]. Many pairs of dopants were analyzed, for instance: Y+La, Dy+Hf ,Y+Hf, Pt+Pd, , La+Hf, , Hf+Zr, or Y+La [16,17].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Resistance of Modified Aluminide Coatings

2019

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The application of protective aluminide coatings is an effective way to increase the oxidation resistance of the treated parts and prolongs their lifetime. The addition of small amount of noble metals (platinum or palladium) or reactive elements such as: hafnium, zirconium, yttrium and cerium has a beneficial effect on oxidation behavior. This beneficial effect includes an improvement of adhesion of alumina scales and reduction of oxide scale growth rate. Platinum and hafnium or zirconium modified aluminide coating were deposited on pure nickel using the electroplating and CVD methods. The coatings consisted of two layers: an outer, β-NiAl phase and the interdiffusion γ'-Ni3Al phase. Palladium dissolved in the whole coating, whereas hafnium and zirconium formed inclusions on the border of the layers. Samples were subjected to cyclic oxidation test at 1100 °C for 200h. Oxidation resistance of the palladium, Hf+Pd and Zr+Pd modified coatings deposited on pure nickel does not differ significantly, but is better than the oxidation resistance of the non-modified one. a Corresponding

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Section: Introductionmentioning

confidence: 99%