2,808
edits
Changes
→Silver-Metal Oxide Materials Ag/CdO, Ag/SnO2, Ag/ZnO
[[File:Softening of Ag SnO2 88 12 TOS F after annealing.jpg|right|thumb|Softening of Ag/SnO<sub>2</sub> 88/12 TOS F after annealing for 1 hr after 30% cold working]]
Fig. 2.99: Strain hardening of internally oxidized Ag/SnO<sub>2</sub> 88/12P by cold working
[[File:Strain hardening of internally oxidized Ag SnO2 88 12P.jpg|right|thumb|Strain hardening of internally oxidized Ag/SnO<sub>2</sub> 88/12P by cold working]]
Fig. 2.100: Softening of Ag/SnO<sub>2</sub> 88/12P after annealing for 1 hr after 40% cold working
Fig. 2.100101:Softening Strain hardening ofAg/SnO<sub>2</sub> 88/12Pafter annealing for 1 hr after40% 12 WPC by cold working
Fig. 2.101102:Strain hardening Softening ofAg/SnO<sub>2</sub> 88/12 WPCby after annealing for 1 hr after different degrees of cold working
Fig. 2.102103:Softening Strain hardening of Ag/SnO<sub>2</sub> 8886/12 14 WPC after annealingfor 1 hr after different degrees of by cold working
Fig. 2.103104:Strain hardening Softening ofAg/SnO<sub>2</sub> 86/14 WPCby after annealing for 1 hr after different degrees of cold working
Fig. 2.104105:Softening Strain hardening of Ag/SnO<sub>2</sub> 8688/14 WPC after annealingfor 1 hr after different degrees of 12 WPD by cold working
Fig. 2.105106:Strain hardening Softening ofAg/SnO<sub>2</sub> 88/12 WPDby after annealing for 1 hr after different degrees of cold working
Fig. 2.106108:Softening of Ag/SnO<sub>2</sub> 88/12 WPD WPX afterannealing for 1 hr after different degreesof cold working
Fig. 2.109: Micro structure of Ag/SnO<sub>2</sub> 92/8 PE: a) perpendicular to extrusion direction
b) parallel to extrusion direction,1) AgSnO<sub>2</sub> contact layer, 2) Ag backing layer
Fig. 2.117: Micro structure ofAg/SnO<sub>2</sub> 88/12 WPD: parallel to extrusion direction
1) AgSnO<sub>2</sub> contact layer, 2) Ag backing layer
Fig. 2.118: Micro structure ofAg/SnO<sub>2</sub> 88/12 WPX:parallel to extrusion direction
1) AgSnO<sub>2</sub> contact layer, 2) Ag backing layer
b) parallel to extrusion direction, 1) AgSnO<sub>2</sub> contact layer, 2) Ag backing layer
'''Table 2.27: Physical Properties of Powder Metallurgical Silver-Metal Oxide Materialswith Fine Silver Backing Produced by the Press-Sinter-Repress Process'''
*'''Silver–zinc oxide (DODURIT ZnO) materials'''
Silver zinc oxide (DODURIT ZnO) contact materials with mostly 6 - 10 wt% oxidecontent including other small metal oxides are produced exclusively by powdermetallurgy ''(Figs. 2.120 – 2.125)'' ''(Table 2.28)''. Adding Ag<sub>2</sub>WO<sub>4</sub> in the process b)as described in the preceding chapter on Ag/SnO<sub>2</sub> has proven most effectivefor applications in AC relays, wiring devices, and appliance controls. Just likewith the other Ag metal oxide materials, semi-finished materials in strip and wireform are used to manufacture contact tips and rivets.Because of their high resistance against welding and arc erosion Ag/ZnOmaterials present an economic alternative to Cd free Ag-tin oxide contactmaterials ''(Tables 2.30 and 2.31)''.
'''Table 2.28: Physical and Mechanical Properties as well as Manufacturing Processes andForms of Supply of Extruded Silver-Zinc Oxide (DODURIT ZnO) Contact'''
Fig. 2.120: Strain hardening ofAg/ZnO 92/8 PW25 by cold working
Fig. 2.121: Softening of Ag/ZnO 92/8 PW25after annealing for 1 hr after 30% cold working
Fig. 2.122: Strain hardening ofAg/ZnO 92/8 WPW25by cold working
Fig. 2.123: Softening ofAg/ZnO 92/8 WPW25 after annealing for1hr after different degrees of cold working
Fig. 2.115: Micro structure of Ag/ZnO 92/8 Pw25: a) perpendicular to extrusion direction
b) parallel to extrusion direction, 1) Ag/ZnO contact layer, 2) Ag backing layer
'''Table 2.29: Optimizing of Silver–Tin Oxide Materials Regarding their SwitchingProperties and Forming Behavior'''
'''Table 2.30: Contact and Switching Properties of Silver–Metal Oxide Materials'''
'''Table 2.31: Application Examples of Silver–Metal Oxide Materials'''
====Silver–Graphite (GRAPHOR)-Materials====
