Table 1:
Chemical composition of the nickel insert determined by EDS.
| Ni | Si | Fe | |
|---|---|---|---|
| at. % | 92.8 | 7 | 0.3 |
| wt. % | 96.3 | 3.5 | 0.3 |

Figure 1:
Light microscopy image (a) and BE image (b) of the nickel insert.
Table 2:
Chemical composition of the special copper alloy determined by EDS.
| Cu | Ni | Al | Zn | Si | Fe | |
|---|---|---|---|---|---|---|
| at. % | 52.6 | 16.6 | 21.5 | 5.9 | 2.4 | 1.0 |
| wt. % | 61.8 | 18.0 | 10.7 | 7.1 | 1.2 | 1.0 |

Figure 2:
Light (a, b) and BE (c) images of the microstructure of a special copper alloy.
Table 3:
EDS microanalyses of the areas shown in Figure 3 in at. %.
| B | O | Al | Si | P | Ti | Cr | Mn | Fe | Ni | Cu | Zn | Mo | Pb | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | - | 11.4 | 2.2 | - | - | - | - | - | - | 2.8 | 24.8 | 2.3 | - | 56.5 |
| 2 | - | 10.6 | 7.9 | - | - | - | - | - | 0.7 | 12.9 | 35.6 | 4.1 | - | 28.2 |
| 3 | 75.5 | - | 0.2 | 0.1 | 0.2 | 0.1 | 16.5 | 0.3 | 3.4 | 1.1 | 1.9 | 0.2 | 0.3 | - |
| 4 | 62.3 | - | 1.3 | 0.2 | 0.4 | - | 14.9 | 0.8 | 14.3 | 1.8 | 3.7 | 0.4 | - | - |
| 5 | - | - | 10.5 | 0.8 | - | - | - | - | 0.3 | 3.4 | 76.7 | 8.2 | - | - |
| 6 | - | - | 32.9 | 5.2 | - | - | - | 0.2 | 1.9 | 34.2 | 23.3 | 2.3 | - | - |

Figure 3:
BE Image of the microstructure of a special copper alloy with marked areas of microanalyses.

Figure 4:
BE Images of the microstructure of a special copper alloy (a) and magnified detail with marked areas of microanalyses (b).
Table 4:
EDS Microanalysis of the areas shown in Figure 4b in at. %.
| B | O | Mg | Al | Si | S | Cr | Mn | Fe | Ni | Cu | Zn | Pb | F | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 52.6 | 0.69 | 0.57 | 1.15 | 38.1 | 1.61 | 2.06 | 3.21 | ||||||
| 2 | 42.7 | 5.7 | 22.2 | 0.3 | 0.3 | 1.7 | 24.4 | 2.8 | ||||||
| 3 | 35.5 | 4.3 | 19 | 0.7 | 0.5 | 11 | 24.9 | 3.9 | 0.3 |

Figure 5:
Light (a, b) and BE images (c, d) of the microstructure of a special copper alloy.
Table 5:
EDS microanalysis of the areas shown in Figure 5d in at. %.
| O | Na | Mg | Al | Si | S | Ca | Cr | Mn | Fe | Ni | Cu | Zn | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 55.8 | 0.9 | 3.6 | 16.5 | 5.4 | 0.2 | 0.5 | 0.8 | - | 1.1 | 2.9 | 11.3 | 1.0 |
| 2 | 54.5 | - | 4.0 | 21.0 | 3.4 | - | 0.4 | 1.1 | 0.2 | 1.5 | 2.7 | 10.0 | 1.1 |