Metal Alloy ICF Capsules Created by Electrodeposition

Horwood, Corie; Stadermann, Michael; Bunn, Thomas L.

doi:10.1080/15361055.2017.1387458

Metal Alloy ICF Capsules Created by Electrodeposition

Journal Article · Mon Dec 04 00:00:00 EST 2017 · Fusion Science and Technology

DOI:https://doi.org/10.1080/15361055.2017.1387458· OSTI ID:1424110

Horwood, Corie ^[1]; Stadermann, Michael ^[1]; Bunn, Thomas L. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Electrochemical deposition is an attractive alternative to physical vapor deposition and micromachining to produce metal capsules for inertial confinement fusion (ICF). Electrochemical deposition (also referred to as electrodeposition or plating) is expected to produce full-density metal capsules without seams or inclusions of unwanted atomic constituents, the current shortcomings of micromachine and physical vapor deposition, respectively. In this paper, we discuss new cathode designs that allow for the rapid electrodeposition of gold and copper alloys on spherical mandrels by making transient contact with the constantly moving spheres. Electrodeposition of pure gold, copper, platinum, and alloys of gold-copper and gold-silver are demonstrated, with nonporous coatings of >40 µm achieved in only a few hours of plating. The surface roughness of the spheres after electrodeposition is comparable to the starting mandrel, and the coatings appear to be fully dense with no inclusions. A detailed understanding of the electrodeposition conditions that result in different alloy compositions and plating rates will allow for the electrodeposition of graded alloys on spheres in the near future. Finally, this report on the electrodeposition of metals on spherical mandrels is an important first step toward the fabrication of graded-density metal capsules for ICF experiments at the National Ignition Facility.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1424110

Report Number(s):: LLNL-JRNL--734772

Journal Information:: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 3 Vol. 73; ISSN 1536-1055

Publisher:: American Nuclear SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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