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→Hard-Silver Alloys
Dispersion hardened alloys of silver with 0.5 wt% MgO and NiO (ARGODUR 32) are produced by internal oxidation. While the melt-metallurgical alloy is easy to cold-work and form the material becomes very hard and brittle after dispersion hardening. Compared to fine silver and hard-silver this material has a greatly improved temperature stability and can be exposed to brazing temperatures up to 800°C without decreasing its hardness and tensile strength.
Because of these mechanical properties and its high electrical conductivity ??? ARGODUR 32 is mainly used in the form of contact springs that are exposed to high thermal and mechanical stresses in relays, and contactors for aeronautic applications.
<xr id="fig:Phase diagram of silver cadmium"/> Fig. 2.53: Phase diagram of silver-cadmium
<xr id="fig:fig2.54Strain hardening of AgCu3 by cold working"/> Fig. 2.54: Strain hardening of AgCu3 by cold working
<xr id="fig:fig2.55Softening of AgCu3 after annealing"/> Fig. 2.55: Softening of AgCu3 after annealing for 1 hr after 80% cold working
<xr id="fig:fig2.56Strain hardening of AgCu5 by cold working"/> Fig. 2.56: Strain hardening of AgCu5 by cold working
<xr id="fig:fig2.57Softening of AgCu5 after annealing"/> Fig. 2.57: Softening of AgCu5 after annealing for 1 hr after 80% cold working
<xr id="fig:fig2.58Strain hardening of AgCu 10 by cold working"/> Fig. 2.58: Strain hardening of AgCu 10 by cold working
<xr id="fig:fig2.59"/> Fig. 2.59: Softening of AgCu10 after annealing for 1 hr after 80% cold working
</figure>
<figure id="fig:fig2.54Strain hardening of AgCu3 by cold working">
[[File:Strain hardening of AgCu3 by cold working.jpg|left|thumb|<caption>Strain hardening of AgCu3 by cold working</caption>]]
</figure>
<figure id="fig:fig2.55Softening of AgCu3 after annealing">
[[File:Softening of AgCu3 after annealing.jpg|left|thumb|<caption>Softening of AgCu3 after annealing for 1 hr after 80% cold working</caption>]]
</figure>
<figure id="fig:fig2.56Strain hardening of AgCu5 by cold working">
[[File:Strain hardening of AgCu5 by cold working.jpg|left|thumb|<caption>Strain hardening of AgCu5 by cold working</caption>]]
</figure>
<figure id="fig:fig2.57Softening of AgCu5 after annealing">
[[File:Softening of AgCu5 after annealing.jpg|left|thumb|<caption>Softening of AgCu5 after annealing for 1 hr after 80% cold working</caption>]]
</figure>
<figure id="fig:fig2.58Strain hardening of AgCu 10 by cold working">
[[File:Strain hardening of AgCu 10 by cold working.jpg|left|thumb|<caption>Strain hardening of AgCu 10 by cold working</caption>]]
</figure>