③ From Copper to bronze T("C) Sn (at%) T(K) 10 20 1200 1400 10B4,87C L 1000 1200 800 13,5 22.0255 799C 56 30.6 1000 6760 a(Cu) 540C 600 5869C 16.624,6 582 15.8 520C 800 -27.0- δ 400 415C -350C 11,0 32.6 600 200 189 C 400 10 20 30 40 Cu Sn(m%) -Sn 材料科学与工程学院 7 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering From Copper to bronze 7