Technical Advancement in Fabricating Dispersion Strengthened Copper Alloys by Mechanical Alloying and Hot Isostatic Pressing for Application to Divertors of Fusion Reactors

Abstract:

National Institute for Fusion Science (NIFS) launched in 2014 a research program for developing Dispersion Strengthened (DS) Cu alloys for application to the heat sink materials of divertors of fusion reactors, using newly installed ball-milling, encapsulation, and Hot Isostatic Pressing (HIP) facilities. A unique feature of these facilities is that the entire process can be performed without exposing the materials to air, enabling precise impurity control. Cu-Al, Cu-Zr and Cu-Y alloys have been produced in this program. Various technological advancement has been made for the fabrication, such as suppression of powder adhesion to the wall of containers during the ball milling, and encapsulation technology including development of small volume tubular capsules.

• Periodical: Materials Science Forum (Volume 941)
• Pages: 778-783
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.941.778
• Online since: December 2018
• Authors: Takeo Muroga*, Hiroyuki Noto, Yoshimitsu Hishinuma, Bo Huang
• Keywords: Copper Alloy, Dispersion Strengthening, Divertor, Fusion Reactor, Hot Isostatic Pressing, Mechanical Alloying

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