Preparation and sintering of nanometer W-2 wt.%Y sub(2)O sub(3) composite powders

W-2 wt.%Y sub(2)O sub(3) composite material with uniform distribution of yttrium element was fabricated through processes of mechanical alloying (MA) and spark plasma sintering (SPS). The relevant productions were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (E...

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Bibliographic Details
Published in:Journal of rare earths 2015-05, Vol.33 (7), p.752-757
Main Authors: Li, Changji, Liu, Shi, Xiong, Liangyin, Wang, Wentao
Format: Article
Language:English
Subjects:
Nanostructure
Rare earth metals
Scanning electron microscopy
Sintering (powder metallurgy)
Spark plasma sintering
Transmission electron microscopy
Tungsten
Yttrium
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Summary:W-2 wt.%Y sub(2)O sub(3) composite material with uniform distribution of yttrium element was fabricated through processes of mechanical alloying (MA) and spark plasma sintering (SPS). The relevant productions were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The XRD showed that the W-2 wt.%Y sub(2)O sub(3) composite powder, including tungsten matrix and Y sub(2)O sub(3) particles, was refined to nanometer sizes during the MA process. The SEM and TEM micrographs showed that the MA produced composite powder presented a lamellar morphology and contained many dislocations and microcracks. The EDS showed that the Y and O elements were uniformly distributed in the W matrix after mechanically alloying for 15 h. The W-2 wt.%Y sub(2)O sub(3) composite material with uniform distribution of yttrium was obtained by sintering of the MA produced composite powder.
ISSN:1002-0721
DOI:10.1016/S1002-0721(14)60481-6