Cdvalues describe: Cd plate
Why it's out
Sublimes in vacuum, whiskers, toxic: on every prohibited-materials list in space and UHV practice.
Where it hides
Vintage aerospace fasteners and old mil-spec hardware.
Properties
The values below are candidate: compiled from the sources named, not yet individually validated.
Provisional provenance: Honig vapour pressure tables, RCA 1969; ECSS space product assurance standards; NASA outgassing database.
Wet cleaning
| Recipe | not applicable |
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| Forbidden | the material itself |
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| Limit | vapour pressure, and occupational law |
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Vacuum and outgassing
| Vapour pressure | THE CONDEMNING NUMBER: 1e-6 Torr near 180 °C, lower than zinc, and cadmium is a category 1B carcinogen |
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Thermal
| CTE | 30.8 ppm/K |
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| Thermal conductivity | 97 W/m·K |
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| Specific heat | 230 J/kg·K |
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| Melting / softening | 321 °C |
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Mechanical
| Young's modulus | 50 GPa |
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| Density | 8.65 g/cm3 |
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Electrical and magnetic
| Relative permeability | ~1.0 |
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| Resistivity | 7.3 µΩ·cm |
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Engineering
| Availability and cost | banned by RoHS and the space standards |
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Sources · 2
- ECSS space product assurance standards
- NASA outgassing database
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