Ingredients / Composition
Cadmium alloys are typically formed by combining cadmium (Cd) with various base metals to modify physical or chemical properties like corrosion resistance, strength, or fusibility.
Common Cadmium Alloys:
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Cadmium-Copper (Cd-Cu)
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Cadmium: 0.5–1%
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Copper: Balance
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Improves conductivity and wear resistance
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Cadmium-Zinc (Cd-Zn)
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Cadmium: Varies (10–30%)
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Zinc: Balance
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Used in low-melting-point soldering applications
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Cadmium-Nickel (Cd-Ni)
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Used in rechargeable batteries (e.g., Ni-Cd batteries)
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Cadmium-Silver (Cd-Ag)
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Silver: 90–95%
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Cadmium: 5–10%
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Used in electrical contacts due to excellent conductivity and arc resistance
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Usage of Cadmium Alloys
| Application Area | Details |
|---|---|
| Electrical Contacts | Cd-Ag alloy resists arcing and wear, ideal for switches and relays. |
| Batteries | Cadmium-nickel alloys are core materials in Ni-Cd rechargeable batteries. |
| Solder & Brazing Alloys | Cd-Zn and Cd-containing solders melt at low temperatures, ideal for electronics and glass-to-metal seals. |
| Coatings and Plating | Some Cd alloys are used for corrosion-resistant plating in aerospace and marine parts. |
| Bearings and Bushings | Cd-Cu improves fatigue resistance and wear properties in rotating equipment. |
Key Highlights
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Excellent Electrical Conductivity: Particularly in Cd-Ag and Cd-Cu alloys.
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Low Melting Points: Ideal for precision soldering and bonding.
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Great Arc Resistance: Used in high-performance switchgear.
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Stable Battery Chemistry: Still used in Ni-Cd battery systems.
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Improved Wear Resistance: Enhances performance in mechanical systems like bushings.