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EFFECT OF WATER VAPOUR ON THE HIGH TEMPERATURE OXIDATION BEHAVIOUR OF NiCrAlY |
Jingsheng Yu;Chungen Zhou;Huibing Xv;Shengkai Gong |
北京航空航天大学材料科学与工程学院 |
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Abstract The high temperature oxidation behavior of low pressure plasma sprayed(LPPS) NiCrAlY coating on nickel-base superalloy was stud ied at 1050℃ in a flow of O2,mixtures of O2 and 5%H2O under atmospheric p ressure.Oxide formed on the surface of LPPS NiCrAlY coating after oxidation at 1 050℃ in pure O2 consisted of Al2O3,whereas oxide formed on the surface of LPPS NiCrAlY coating after oxidation at 1050℃ in a mixture of O2 and 5%H2O is composed of Al2O3,Cr2O3 and NiO.The effect of water vapor on the cha racteristics of the oxide scale formed is attributed to the increase in Ni catio n transport.
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Received: 03 December 2001
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Corresponding Authors:
Jingsheng Yu
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