MICROSTRUCTURE OF NiCoCrAlY COMPONENT IN PLASMA SPRAYED ZrO2/NiCoCrAlY GRADED COATING
来源期刊：中国有色金属学报(英文版)1997年第1期
论文作者：Xiang Xinghua Zhu Jingchuan Yin Zhongda Lai Zhonghong
文章页码：107 - 111
Key words：plasma spraying ；graded coating ；NiCoCrAlY； microstructure
Abstract: NiCoCrAlY alloy component in ZrO2/NiCoCrAlY graded coating forms heterogeneous microstructure after plasma spraying, which consists of γ (Ni) matrix phase and some ε Co phase, as well as a little γ′ (Ni3Al) phase. Moreover, owing to the impaction of molten NiCoCrAlY droplets on the substrate at high speed, the alloy particles experience severe deformation at a high strain rate, producing a lot of dislocations. During rapid solidification, NiCoCrAlY alloy reacts with oxygen in air, and some NiO, Cr2O3, Al2O3 form in the alloy.
