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Formula: Fe 54/Ni 29/Co 17
Form: Powder
Material: Nickel/Iron/Cobalt - Glass Sealing Alloy (Kovar®)
Commodity: Alloys
Max Particle Size: 45μm
Production Method: Atomized

Glass Sealing Alloy Spherical Powder (Fe54/Ni29/Co17)

Glass Sealing Alloy Spherical Powder (Fe54/Ni29/Co17) is a highly engineered particulate form of the Fe-Ni-Co alloy, optimized for powder-based fabrication techniques and metallurgical bonding with technical glass. Its spherical morphology enhances flowability, packing density, and sintering behavior, making it ideal for additive manufacturing, thermal spray coatings, and glass-metal brazing applications. The powder’s thermal expansion compatibility with borosilicate and silicate glasses supports robust hermetic seals in microelectronics, vacuum devices, and optical systems. Key uses include filling interstitial gaps in precision feedthroughs, forming bonding layers in sealed sensor arrays, and sintering into composite joints for high-performance enclosures. It also serves in laser sintering for custom electronic components and hybrid packaging in harsh environments. This material plays a critical role in advancing miniaturized device architectures and robust encapsulation techniques. Glass Sealing Alloy Spherical Powder (Fe54/Ni29/Co17) is thus indispensable for research and production in additive manufacturing, photonics, and advanced hermetic sealing processes.
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Tolerances

Powder
Mean Particle Size Nominal
Minimum Particle Size Nominal
Maximum Particle Size Nominal
Maximum Particle Size Nominal
Particle Size D10 Nominal
Particle Size D50 Nominal
Particle Size D90 Nominal

Material Properties for Alloys

Mechanical Properties
Element Value
Elongation at break( % ) 30
Modulus of elasticity( GPa ) 207
Tensile strength( MPa ) 510-520
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 48.9
Temperature coefficient( K⁻¹ ) 0.0037
Magnetic Properties
Element Value
Curie temperature( C ) 435
Thermal Properties
Element Value
Melting point( C ) 1450
Specific heat( J K⁻¹ kg⁻¹ ) 439@23°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 17.3@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 4.81@20-200°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8.36-8.5

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