previous works [24,25], the effect of the amorphous Fe-W
coating transformation from non-crystal to crystal on W-Cu
composite materials was studied in detail. During the bonding
process, the Fe-W deposit undergoes a change from the amorphous
to nano crystals of alloy compounds with grain sizes of
58.6 nm, 26.3 nm for W and Fe-W, respectively. In the current
research, the effect of bonding temperatures on the microstructure
and mechanical properties of the joint interfaces were
studied extensively.