Two‐Step Sintering of Molybdenum Nanopowder

Park, Min Suh; Jo, Tae Sun; Kim, Se Hoon; Kim, Dae‐Gun; Kim, Jae Won

doi:10.1002/9780470599730.ch39

Cited by 1 publication

(2 citation statements)

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“…The experimental SPS data (1200 °C (Tsample = 1288 °C), 90 MPa and 100 °C/min) with the ramping stage (Fig. 4(a)) was used to plot the linearization curve for various n values (1)(2)(3)(4)(5) shown in Fig. 4(b).…”

Section: Densification Mechanism Of Mo Nanopowdersmentioning

confidence: 99%

“…Srivatsan et al, showed that the densification of Mo nanopowders (100 nm) using plasma pressure compaction method resulted in grain size of 1 μm-3 μm with 97% relative density. Apparently, only Park et al [5], obtained the Mo compact with ultra-fine 500 nm grain size with 90% relative density using a two-step sintering method with 20 h holding time. Also, the description of the fabrication of the Mo mirrors by the sintering route tested for reflectivity is limited in the literature [4,6,7].…”

Section: Introductionmentioning

confidence: 99%

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Consolidation of Molybdenum nanopowders by spark plasma sintering: Densification mechanism and first mirror application

Lee

Manière

McKittrick

et al. 2019

Journal of Nuclear Materials

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Mo nanopowders are synthesized by ball milling and the following hydrogen reduction of MoO3 powders. The densification mechanism of Mo nanopowders during spark plasma sintering (SPS) is analyzed by the combination of the regression of the experimental data on regular SPS and on the SPS multistep pressure dilatometry based on the continuum theory of the sintering. The Mo mirror with 400 nm average grain size and 93% relative density is fabricated by the SPS. The performance of the mirrors made from a single crystal Mo and from the hydrogen-reduced sintered Mo nanopowder is discussed. The microstructure and optical properties of the mirrors are characterized before and after plasma exposure, and no substantial degradation of the reflectivity was observed.

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