C and comma structure consists of α-Sn phase, which is a complex of luxury suites and several metal compound FES consists of SnSb phase, Ag3 (Sn, In), Cu6 (Sn, Sb) are edge-train of several luxury suites.
C and the microstructure consists of α-Sn phase, the main phase. And phase-oriented metal compounds comprising a phase SnSb, Ag3 (Sn, In), Cu6 (Sn, Sb) is the primary intergranular phase.
C and microstructure is composed of phase α - Sn, which is the main phase And phase of intermetallic compound metal phase, composed of SnSb, Ag3 (Sn In), Cu6 Sn Sb (,). The grain boundary of the main phase