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Cobalt Foil/Sheet
Available Configurations
Properties common to all products in this list
| Purity | Thickness | Sides | Temper ⓘ | Support | Other Variant |
|---|---|---|---|---|---|
| 99.8% (2N8) to 99.99% (4N) | 0.002 mm (foil) to 6 mm (plate) | 10 mm to 250 mm | Annealed As rolled |
Temporary acrylic on ≤ 0.0025 mm thick foils | Light Tight (Pinhole Free) |
Need custom configurations? Please contact us.
Key Features
Cobalt Foil at 99.8–99.99% purity is a high-performance, corrosion-resistant metallic foil offering excellent wear resistance, thermal stability, and ferromagnetic behavior alongside notable strength retention at elevated temperatures and pronounced work-hardening behavior:
High Tensile Strength (1135 MPa) for Demanding Mechanical Environments
With a tensile strength of 1135 MPa in the hard condition, Cobalt Foil performs reliably in demanding aerospace, medical device, and energy applications — retaining mechanical integrity under conditions that would compromise softer or less work-hardenable metallic foils.
High Melting Point (1495 °C) Supporting High-Temperature Mechanical Environments
A melting point of 1495 °C underpins cobalt foil's reliability in high-friction, corrosive, and high-temperature mechanical environments — building on cobalt's established role in superalloys and wear-resistant coatings where thermal and mechanical performance must be sustained simultaneously.
Phosphidation Compatibility for Direct Catalyst Fabrication on the Foil Surface
Cobalt foil's compatibility with phosphidation processes allows cobalt phosphide catalysts to be fabricated directly on the foil surface — a feature critical for efficient hydrogen and oxygen evolution reactions in water electrolysis, enabling direct use of the foil as a bifunctional electrode without separate catalyst transfer steps.
Established Role in Superalloys & Wear-Resistant Coatings
Cobalt's established role in superalloys and wear-resistant coatings underscores its utility in high-friction, corrosive, and high-temperature mechanical environments — providing a foundation of proven performance for cobalt foil's use in demanding industrial and aerospace component applications.
Robust Research Platform Combining Strength, Corrosion Resistance & Magnetic Behavior
In research, cobalt foil serves as a robust platform for novel electrode architectures, supporting advancements in electrochemical catalysis and renewable energy systems where strength, corrosion resistance, and magnetic behavior must be combined in a single material — a combination not readily available in other metallic foils.
Industrial Applications
Cobalt Foil is used across water electrolysis, catalyst fabrication, biomedical implants, and electrochemical research wherever the combination of strength, corrosion resistance, ferromagnetic behavior, and catalytic surface compatibility must be provided in a foil form factor:
- ✦ Bifunctional Electrodes for Water Electrolysis
- Used as bifunctional electrodes for water electrolysis, where cobalt foil's compatibility with phosphidation processes allows cobalt phosphide catalysts to be fabricated directly on the foil surface — supporting efficient hydrogen and oxygen evolution reactions in a single foil component without separate catalyst deposition steps.
- ✦ Catalyst Substrate Fabrication
- Applied as catalyst substrate material in catalyst fabrication, where cobalt's well-documented catalytic and electrocatalytic surface chemistry, combined with its foil format's high surface-area-to-volume ratio, provides a reproducible platform for both applied electrocatalysis and fundamental catalytic surface studies.
- ✦ Biocompatible Components in Joint Implants
- Used in biocompatible components for joint implants, where cobalt's biocompatibility and wear resistance support reliable long-term performance in load-bearing implant components subject to repeated mechanical stress and sustained biological tissue contact.
- ✦ Wear-Resistant Coating & Superalloy Applications
- Used in wear-resistant coating production and as feedstock supporting superalloy component applications, where cobalt's established role in these systems, combined with its tensile strength of 1135 MPa and high-temperature stability, provides reliable performance in high-friction, corrosive, and high-temperature mechanical environments.
- ✦ Novel Electrode Architecture & Electrochemical Catalysis Research
- Used in research as a robust platform for novel electrode architectures, supporting advancements in electrochemical catalysis and renewable energy systems where the combination of strength, corrosion resistance, and magnetic behavior in a single foil material enables experimental designs not achievable with other metallic foils.
Material Properties
| Element | Value |
|---|---|
| Atomic number | 27 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Ar 3d⁷ 4s² |
| Valences shown | 2, 3 |
| Atomic weight( amu ) | 58.9332 |
| Thermal neutron absorption cross-section( Barns ) | 37.5 |
| Photo-electric work function( eV ) | 5 |
| Atomic radius - Goldschmidt( nm ) | 0.125 |
| Ionisation potential( No./eV ) | 2/ 17.06 |
| Ionisation potential( No./eV ) | 4/ 51.3 |
| Ionisation potential( No./eV ) | 3/ 33.5 |
| Ionisation potential( No./eV ) | 1/ 79.5 |
| Ionisation potential( No./eV ) | 1/ 79.5 |
| Ionisation potential( No./eV ) | 6/ 102 |
| Element | Value |
|---|---|
| Material condition | Hard |
| Material condition | Soft |
| Poisson's ratio | 0.32 |
| Poisson's ratio | 0.32 |
| Bulk modulus( GPa ) | 181.5 |
| Bulk modulus( GPa ) | 181.5 |
| Tensile modulus( GPa ) | 211 |
| Tensile modulus( GPa ) | 211 |
| Hardness - Vickers( kgf mm⁻² ) | 320 |
| Hardness - Vickers( kgf mm⁻² ) | 170 |
| Tensile strength( MPa ) | 1135 |
| Tensile strength( MPa ) | 760 |
| Yield strength( MPa ) | 345-485 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 6.34@20°C |
| Temperature coefficient( K⁻¹ ) | 0.0066@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | -1.33 |
| Element | Value |
|---|---|
| Boiling point( C ) | 2870 |
| Density( gcm⁻³ ) | 8.9@20°C |
| Element | Value |
|---|---|
| Melting point( C ) | 1495 |
| Latent heat of evaporation( J g⁻¹ ) | 6490 |
| Latent heat of fusion( J g⁻¹ ) | 263 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 456@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 100@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 12.5@0-100°C |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |