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AssigneesNippon Steel & Sumitomo Metal Corporation, Waseda University
InventorsKohei TATSUMI, Shinji ISHIKAWA, Norie MATSUBARA, Masamoto TANAKA
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The present invention can give a joining structure using metal nanoparticles to join the same types or different types of metal where when one surface metal is Al based, the parts are joined through a joining layer containing Ni nanoparticles, whereby a good joining strength is obtained. Further, by using two joining layers (6, 8) including metal nanoparticles to sandwich metal foil (7) so as to form a joining layer and joining the same type or different types of surface metals (3-4) through this joining layer, it is possible to ease the thermal stress due to the difference in amounts of thermal expansion of joined members which have two surface metals.
A metal joining structure where surface metals of two joined members are joined through a joining layer including metal nanoparticles, wherein the surface metal of at least one said joined member is Al or an Al alloy and said metal nanoparticles are Ni nanoparticles.
A metal joining method comprising the steps of forming a joining layer including metal nanoparticles between surface metals of two joined members and heating it to join the two joined members through said joining layer, wherein, the surface metal of at least one said joined member is Al or an Al alloy, said metal nanoparticles are Ni nanoparticles, and the heating temperature is 200° C. or more.
A metal joining structure where surface metals of two joined members are joined through a joining layer containing metal nanoparticles, wherein said joining layer is formed by a first joining layer containing metal nanoparticles, a metal foil, and a second joining layer containing metal nanoparticles in this order.
A metal joining method comprising the steps of forming a joining layer including metal nanoparticles between the surface metals of two joined members and heating it to join the surface metals of the two joined members, wherein said joining layer is comprised of a first joining layer containing metal nanoparticles, a metal foil, and a second joining layer containing metal nanoparticles in this order, and wherein, when said metal foil is Al or an Al alloy, said metal nanoparticles are Ni nanoparticles, while, when said metal foil is any one of Ag, Au, or their alloys, said metal nanoparticles are nanoparticles comprised of at least one of Ag, Au, Cu, or Ni, and the heating temperature is 200° C. or more.
A metal joining material comprising of a first joining layer containing metal nanoparticles, a metal foil, and a second joining layer containing metal nanoparticles formed in this order.
Dependencies are inferred from the claim text.