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

Lee, Geuntak; Manière, Charles; McKittrick, Joanna; Doerner, Russell; Nishijima, Daisuke; Gattuso, Anthony; Abrams, Tyler; Thomas, Dan; Back, Christina; Olevsky, Eugene A.

doi:10.1016/j.jnucmat.2019.01.028

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

Journal Article · Sat Jan 19 04:00:00 EST 2019 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2019.01.028· OSTI ID:1611084

Lee, Geuntak ^[1]; Manière, Charles ^[2]; ^[3]; Doerner, Russell ^[4]; Nishijima, Daisuke ^[4]; Gattuso, Anthony ^[5]; Abrams, Tyler ^[5]; Thomas, Dan ^[5]; Back, Christina ^[5]; Olevsky, Eugene A. ^[6]

San Diego State Univ., CA (United States). Mechanical Engineering; Univ. of California, San Diego, CA (United States). Mechanical and Aerospace Engineering; DOE/OSTI
San Diego State Univ., CA (United States). Mechanical Engineering
Univ. of California, San Diego, CA (United States). Mechanical and Aerospace Engineering
Univ. of California, San Diego, CA (United States). Center for Energy Research
General Atomics, San Diego, CA (United States)
San Diego State Univ., CA (United States). Mechanical Engineering; Univ. of California, San Diego, CA (United States). NanoEngineering

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.

View Accepted Manuscript (DOE)

Research Organization:: San Diego State Univ., CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0008581

OSTI ID:: 1611084

Alternate ID(s):: OSTI ID: 1547844
OSTI ID: 22886698

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 516; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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

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