Brazing-filler material and method for brazing diamond

A brazed diamond comprising:

• a metal substrate, and
• a diamond brazed on the metal substrate with a brazing-filler material, between the metal substrate and the diamond, consisting essentially of vanadium of 0.001 to 2.0 mass % and the balance being principal components consisting of copper and at least one selected from the group consisting of gold and silver,
• wherein the brazing-filler material has precipitated vanadium carbides in an island shape on a joined interface between the brazing-filler material and the diamond, and the joined interface has less roughness than that showing black.

An ornamental brazed diamond comprising:

• a metal substrate, and
• a diamond brazed on the metal substrate with a brazing-filler material, between the metal substrate and the diamond, consisting essentially of vanadium of 0.001 to 2.0 mass % and the balance being principal components consisting of copper and at least one selected from the group consisting of gold and silver,
• wherein the brazing-filler material has precipitated vanadium carbides in an island shape on a joined interface between the brazing-filler material and the diamond, and the joined interface has less roughness than that showing black.

A brazed diamond comprising:

• a diamond;
• brazing material including 0.001 to 2.0 mass. % vanadium, copper and one of gold and silver, said brazing material being connected to said diamond by precipitated vanadium carbides arranged in island shapes at an interface between said diamond and said brazing material, said interface having a surface roughness displaying a brightness greater than black.