Development of Au-In-Cd decoupler by a Hot Isostatic Pressing (HIP) technique for short pulsed spallation neutron source

Oi, Motoki ; Teshigawara, Makoto   ; Harada, Masahide   ; Naoe, Takashi   ; Maekawa, Fujio  ; Kasugai, Yoshimi  

In order to utilize Au-In-Cd alloy as a decoupler, it is required to bond between the Au-In-Cd alloy and aluminum alloy with enough bonding strength (more than 30 MPa). We adopted a Hot Isostatic Pressing (HIP) technique to realize bonding between Au-In-Cd and aluminum alloy, because it is available for curved shape of moderator vessel. As a HIP conditions of the temperature of 535 C, pressure of 100 MPa and holding time of 1 hour, we got enough tensile strength of the bonding surface (86.6 MPa). It is larger than the required strength of 30 MPa.