Song Liguo, Li Shusuo(~*, Zheng Yunrong(, Han Yafang(1.School of Material Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)
The effect of rare earth element yttrium on the high temperature oxidation resistance of a directionally solidified Ni-base superalloy was studied with scanning electron microscopy(SEM), energy dispersive spectrum(EDS)and X-ray diffraction(XRD)techniques. The results show that the oxidation resistance of the alloy is substantially improved by adding proper amount of yttrium.
yttrium; superalloy; high temperature oxidation; rare earths
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