Changes

===Silver Composite Materials===

Since silver and nickel are not soluble in each other in solid form and also show very limited solubility in the liquid phase, silver nickel composite materials with higher Ni contents can only be produced by powder metallurgy. During extrusion of sintered Ag/Ni billets into wires, strips and rods, the Ni particles embedded in the Ag matrix are stretched and oriented in the microstructure into a pronounced fiber structure <xr id="fig:Micro structure of AgNi9010"/><!--(Fig. 2.75)--> and <xr id="fig:Micro structure of AgNi 8020"/><!--(Fig. 2.76)-->