A method comprising: positioning a first component comprising a first metal or alloy and a second component comprising a second metal or alloy to each other to define a joint region between adjacent portions of the first component and the second component; positioning a pre-sintered preform braze material in the joint region, wherein the PSP braze material comprises a wide gap braze material; heating the PSP braze material to form a molten braze alloy; and cooling the molten braze alloy to join the first and second components; characterized in that the wide gap braze material comprises one of: between 50 wt. % and 70 wt. % Ni, between 10 wt. % and 15 wt. % Cr, between 8 wt. % and 10 wt. % Ta, between 8 wt. % and 10 wt. % Co, between 4 wt. % and 7 wt. % Al, between 2 wt. % and 4 wt. % W, between 1 wt. % and 2 wt. % Re, 1 wt. % Mo, 1 wt. % Hf, and, optionally, up to 1 wt. % each of at least one of Ti, Nb, Pd, Pt, Ir, Ru, C, B, Si, P, Mn, Fe, Ce, La, Y, or Zr; or between 50 wt. % and 70 wt. % Ni, between 10 wt. % and 15 wt. % Cr, between 8 wt. % and 10 wt. % Ta, between 8 wt. % and 10 wt. % Co, between 4 wt. % and 7 wt. % Al, between 2 wt. % and 4 wt. % W, between 1 wt. % and 2 wt. % Re, between 0.5 wt. % and 1 wt. % Mo, between 0.5 wt. % and 1 wt. % Hf, between 0.1 wt. % and 0.5 wt. % Nb, between 0.05 wt. % and 3 wt. % Si, and between 0.5 wt. % and 2 wt. % B. positioning a first component comprising a first metal or alloy and a second component comprising a second metal or alloy to each other to define a joint region between adjacent portions of the first component and the second component; positioning a pre-sintered preform braze material in the joint region, wherein the PSP braze material comprises a wide gap braze material; heating the PSP braze material to form a molten braze alloy; and cooling the molten braze alloy to join the first and second components; characterized in that the wide gap braze material comprises one of: between 50 wt. % and 70 wt. % Ni, between 10 wt. % and 15 wt. % Cr, between 8 wt. % and 10 wt. % Ta, between 8 wt. % and 10 wt. % Co, between 4 wt. % and 7 wt. % Al, between 2 wt. % and 4 wt. % W, between 1 wt. % and 2 wt. % Re, 1 wt. % Mo, 1 wt. % Hf, and, optionally, up to 1 wt. % each of at least one of Ti, Nb, Pd, Pt, Ir, Ru, C, B, Si, P, Mn, Fe, Ce, La, Y, or Zr; or between 50 wt. % and 70 wt. % Ni, between 10 wt. % and 15 wt. % Cr, between 8 wt. % and 10 wt. % Ta, between 8 wt. % and 10 wt. % Co, between 4 wt. % and 7 wt. % Al, between 2 wt. % and 4 wt. % W, between 1 wt. % and 2 wt. % Re, between 0.5 wt. % and 1 wt. % Mo, between 0.5 wt. % and 1 wt. % Hf, between 0.1 wt. % and 0.5 wt. % Nb, between 0.05 wt. % and 3 wt. % Si, and between 0.5 wt. % and 2 wt. % B. between 50 wt. % and 70 wt. % Ni, between 10 wt. % and 15 wt. % Cr, between 8 wt. % and 10 wt. % Ta, between 8 wt. % and 10 wt. % Co, between 4 wt. % and 7 wt. % Al, between 2 wt. % and 4 wt. % W, between 1 wt. % and 2 wt. % Re, 1 wt. % Mo, 1 wt. % Hf, and, optionally, up to 1 wt. % each of at least one of Ti, Nb, Pd, Pt, Ir, Ru, C, B, Si, P, Mn, Fe, Ce, La, Y, or Zr; or between 50 wt. % and 70 wt. % Ni, between 10 wt. % and 15 wt. % Cr, between 8 wt. % and 10 wt. % Ta, between 8 wt. % and 10 wt. % Co, between 4 wt. % and 7 wt. % Al, between 2 wt. % and 4 wt. % W, between 1 wt. % and 2 wt. % Re, between 0.5 wt. % and 1 wt. % Mo, between 0.5 wt. % and 1 wt. % Hf, between 0.1 wt. % and 0.5 wt. % Nb, between 0.05 wt. % and 3 wt. % Si, and between 0.5 wt. % and 2 wt. % B.