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In the manufacture the initial powder mixes different processes are applied which provide specific advantages of the resulting materials in respect to their contact properties <xrlabel id="fig:figlist" group="fig" />[[{{FULLPAGENAME}}#figures|(Figs. 2.87 – 2.119)]]. Some of them are described here as follows:
:'''a) Powder blending from single component powders''' <br> In this common process all components including additives that are part of the powder mix are blended as single powders. The blending is usually performed in the dry stage in blenders of different design.
Further processing of these differently produced powders follows the conventional processes of pressing, sintering and hot extrusion to wires and strips. From these contact parts such as contact rivets and tips are manufactured. To obtain a brazable backing the same processes as used for Ag/CdO are applied. As for Ag/CdO, larger contact tips can also be manufactured more economically using the press-sinter-repress (PSR) process <xr id="tab:tab2.27"/> (Table 2.27).
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<xr id="fig:fig2.87"/> Fig. 2.87: Strain hardening of Ag/SnO<sub>2</sub> 92/8 PE by cold working
<xr id="fig:fig2.119"/> Fig. 2.119: Micro structure of Ag/SnO<sub>2</sub> 86/14 WPX: a) perpendicular to extrusion direction
b) parallel to extrusion direction, 1) AgSnO<sub>2</sub> contact layer, 2) Ag backing layer
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