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In this paper, high purity cobalt (Co) powder and fine Y2O3 powder were used to fabricate Y2O3 doped Co bulks through ball milling and spark plasma sintering (SPS). The transformation from face-centered cubic (FCC) structure to hexagonal close-packed (HCP) structure during the cooling process after SPS was investigated. It has been shown that the addition of Y2O3 decreases significantly the grain...
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