Wetting behaviour of copper on an iron aluminide alloy

Infrared Brazing Fe3Al Using Ag-Based Filler Metals

“…Because Al can be dissolved in both Ag and Cu, the contact angles of Ag-Al and Ag-Al-Cu melts decrease effectively during the test. [15,16] In addition, the melting point of the BAg-8 braze alloy (1053 K (780°C)) is much lower than that of pure Ag (1234.9 K (961.9°C)). [17] According to Figure 1, the BAg-8 braze alloy specimens demonstrate better wettability than pure Ag specimens.…”

“…[9,14] Iron aluminides can be wetted by Au, Ag, and Cu. [15,16] Santella and Patterson [15] proposed that Ag demonstrates excellent wettability on the Fe 3 Al substrate with contact angles of 49 deg and 11 deg at 1241 K (968°C) and 1260 K (987°C), respectively. On the one hand, it is deduced that the wetting was assisted by the dissolution of Al from the Fe 3 Al substrate into the sessile drop of Ag and thereafter by the formation of an Ag-Al eutectic.…”

“…[15] On the other hand, the wettability of pure Cu on the Fe 3 Al substrate is similar to what occurs on the alumina because an alumina film is found covering the Fe 3 Al surface. Recently, Brochu et al [16] found that the Fe 3 Al alloyed with Cr can be wetted by Cu at 1343 K (1070°C), which was lower than the melting point of pure Cu. However, the brazing temperature of Cu at 1343 K (1070°C) is much higher than that of Ag.…”

Growth behavior of Cu/Al intermetallic compounds in hot‐dip aluminized copper

“…8(b)) comparing to that without KF (Fig. 8(c)), and the wetting behavior and the diffusion [22] can be the best when the sample is hot dipped at T = 953-973 K for 4-8 s.…”

Infrared brazing of Fe3Al intermetallic compound using gold-based braze alloy

“…Both the wettability of the molten braze on Fe 3 Al substrate, and the formation of intermetallic phases in the joint should be taken into consideration. Brochu et al found that Fe 3 Al alloyed with Cr can be wetted by Cu at 1,070°C, which is lower than the melting point of pure Cu [7]. The brazing temperature of Fe 3 Al with Cu filler metal is above 1,050°C, which can be decreased by alloying Cu with Au.…”