Figure 3

The SEM images of the samples at different magnifications: (A1,A2) PbO, (B1,B2) PA6, (C1,C2) PA6/PbO-5%, (D1,D2) PA6/PbO-10%, (E1,E2) PA6/PbO-20%, and (F1,F2) PA6/PbO-50%.

The SEM images of the samples at different magnifications: (A1,A2) PbO, (B1,B2) PA6, (C1,C2) PA6/PbO-5%, (D1,D2) PA6/PbO-10%, (E1,E2) PA6/PbO-20%, and (F1,F2) PA6/PbO-50%.