US3697259A Fluxless aluminum brazing composition Google ...
this disclosure relates to a fluxless brazing alloy for use in forming brazed composites made from members of aluminum and its alloy, said brazing alloy consisting of, in weight percent, 3555 percent aluminum, 1020 percent silicon, 2560 percent germanium 6588 percent aluminum, 220 percent silicon, 215 percent indium 6580 percent aluminum, 1525 percent silicon, 515 percent yttrium.