Surface characteristics of rapidly solidified nickel-based superalloy pow-ders prepared by PREP
来源期刊：Rare Metals2003年第4期
论文作者：CHEN Huanming , HU Benfu , and LI Huiying) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing , China) School of Physics and Electrical Information Engineering, Ningxia University, Yinchuan , China
文章页码：309 - 314
摘 要：<正> The surface microstructure and the surface segregation of FGH95 nickel-based superalloy powders prepared through plasma rotating electrode processing （PREP） have been investigated by using SEM and AES. The results indicate that the surface microstructure of powders changes from dendrite into cellular structure as the particle size of powders de-crease, and the predominant precipitates solidified on the particle surfaces were identified as MC’ type carbides enriched with Nb and Ti. It was also indicated that along with the depth of particle surfaces, the segregation layer of S, C and O ele-ments are thick, and that of Ti, Cr elements are thin for large size powders while they are in reverse for median size parti-cles.
CHEN Huanming , HU Benfu , and LI Huiying1) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China2) School of Physics and Electrical Information Engineering, Ningxia University, Yinchuan 750021, China
摘 要：<正> The surface microstructure and the surface segregation of FGH95 nickel-based superalloy powders prepared through plasma rotating electrode processing （PREP） have been investigated by using SEM and AES. The results indicate that the surface microstructure of powders changes from dendrite into cellular structure as the particle size of powders de-crease, and the predominant precipitates solidified on the particle surfaces were identified as MC’ type carbides enriched with Nb and Ti. It was also indicated that along with the depth of particle surfaces, the segregation layer of S, C and O ele-ments are thick, and that of Ti, Cr elements are thin for large size powders while they are in reverse for median size parti-cles.
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