THE EFFECT OF THE REACTIVE ELEMENT ON THE CHROMOXIDE AND ALUM IN IDE LAYERS IN THE HIGH TEMPERATURE CONDITION
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THE EFFECT OF THE REACTIVE ELEMENT ON THE CHROMOXmE AND ALUMINmE LAYERS IN THE
HIGH TEMPERATURE CONDITION. Oxide layers at high temperature condition, as Cr203' A12O3. growing act not only as
corrosion barrier, but also as a diffusion barrier of agressive components. MA956 and Ni75Cr25 alloy were studied to observe
the effect of yttrium coating on their oxidation behavior. The influence of these coatings on the oxidation behaviour of the alloy
was studied. Thin coatings of Yttrium have been applied to the surface of those alloys by vacuum coating. The growth of the
oxide layers under controlled has been investigated in this work by Analytical Transmission Electron Microscope (ATEM) and
Scanning Electron Microscopy (SEM). It was found that addition of small amounts of elements such as Yttrium to these alloys
greatly increase their oxidation resistance.
HIGH TEMPERATURE CONDITION. Oxide layers at high temperature condition, as Cr203' A12O3. growing act not only as
corrosion barrier, but also as a diffusion barrier of agressive components. MA956 and Ni75Cr25 alloy were studied to observe
the effect of yttrium coating on their oxidation behavior. The influence of these coatings on the oxidation behaviour of the alloy
was studied. Thin coatings of Yttrium have been applied to the surface of those alloys by vacuum coating. The growth of the
oxide layers under controlled has been investigated in this work by Analytical Transmission Electron Microscope (ATEM) and
Scanning Electron Microscopy (SEM). It was found that addition of small amounts of elements such as Yttrium to these alloys
greatly increase their oxidation resistance.
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