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http://dx.doi.org/10.4150/KPMI.2010.17.3.235

Fabrication of Ultra Fine Grained Molybdenum and Mechanical Properties  

Kim, Se-Hoon (Department of Materials Science and Engineering, Hanyang University)
Seo, Young-Ik (Department of Materials Science and Engineering, Hanyang University)
Kim, Dae-Gun (Department of Materials Science and Engineering, Hanyang University)
Suk, Myung-Jin (Department of Materials & Metallurgical Engineering, Kangwon National University)
Kim, Young-Do (Department of Materials Science and Engineering, Hanyang University)
Publication Information
Journal of Powder Materials / v.17, no.3, 2010 , pp. 235-241 More about this Journal
Abstract
Mo nanopowder was synthesized by ball-milling and subsequent hydrogen-reduction of $MoO_3$ powder. To fabricate ultra fine grained molybdenum, two-step sintering and spark plasma sintering process were employed. The grain size of specimen by two-step sintering and spark plasma sintering was around $0.6\;{\mu}m$ and $0.4\;{\mu}m$, respectively. Mechanical properties of ultra fine grained Mo with relative density of above 90% were significantly improved at room and high temperatures comparing to commercial bulk Mo of 99% relative density. This result was mainly explained by the grain size refinement due to diffusion-controlled sintering.
Keywords
Nanostructured Mo powder; Two-step sintering; Spark plasma sintering; Ultra fine grained molybdenum;
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Times Cited By KSCI : 4  (Citation Analysis)
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