论文部分内容阅读
A new-type of β-NiAl coating containing Y_2O_3 particles was obtained by electrolytic co-deposition andpack aluminizing techniques,and the influences of the nature of Y_2O_3 and its content on the oxidation behaviourof the coating at 1100℃ were studied.The test results indicate that the oxidation rates of the composite coatingsare reduced and the scale adhesion is also improved remarkably.The content of Y_2O_3 has little influence on theoxidation rates of the composite coatings,but does obviously on the scale adhesion by modifying the configura-tion of the oxides at the scale-coating interface.The needle-like oxides penetrating into the coating show anobvious keying effect.A part of the dispersed Y_2O_3 in the as-deposited coating accumulates and forms aY_2O_3-rich layer at the coating-substrate interface immediately after aluminizing.The layer is beneficial toreduce the degradation of the composite coating.
A new-type of β-NiAl coating containing Y_2O_3 particles was obtained by electrolytic co-deposition and package aluminizing techniques, and the influences of the nature of Y_2O_3 and its content on the oxidation behavior of the coating at 1100 ℃ were studied.The test results indicate that the oxidation rates of the composite coatingsare reduced and the scale adhesion is also improved remarkably.The content of Y_2O_3 has little influence on theoxidation rates of the composite coatings, but does obviously on the scale adhesion by modifying the configura tion of the oxides at the scale-coating interface. needle-like oxides penetrating into the coating show an obvious keying effect. A part of the dispersed Y 2 O 3 in the as-deposited coating accumulates and forms a Y 2 O 3 -rich layer at the coating-substrate interface after after aluminizing. layer is beneficial toreduce the degradation of the composite coating.