Research Status of Evolution of Microstructure and Properties of Sn-Based Lead-Free Composite Solder Alloys

Figure 14

Microstructure of as-cast solders. (a) SAC305, (b) SAC305/0.05 FNSs, (c) SAC305/0.1 FNSs, and (d) SAC305/0.2FNSs [41].

(a)

(b)

(c)

(d)