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Alumina


Alumina coatings deposited using Thermal Spray Coating Technology have many production uses. Applied via Plasma Flame Spray, these coatings exhibit high hardnesses and excellent resistance to hard surface wear. Less dense coatings can be achieved using LVCG (low velocity combustion gas) spray systems making the coating more resistant to thermal shock and permitting greater infusion of liquid sealers.

Alumina coatings provide excellent dielectric strength making them ideal for electrical isolation at temperatures most polymers will not survive.

Alumina thermal spray powders are available in several common sizes and purities.

Typical applications include providing resistance to wear by fibers, threads, packing or lip seals, and hard surfaces such as sheet steel. Dielectric applications include soldering iron tips, electrical coils and electrical isolation of rolls and metal housings. Alumina can replace plastic insulators where high temperatures prevent their use.




Compare Items
  Material Application Method Particle Size (microns) Porosity (Vol.%) Macro-hardness (Rc) Cross Sectional Hardness (DPH300) As Sprayed Surface Finish (AA) Ground Finish (AA) Tensile Bond Strength (PSI) Thickness Limit (inches)
Alumina 98 LVCG -45 +15 4 40 690 500 63-125 2000-3000 >0.020
Alumina 98 Plasma -45 +5 1 60 690-750 300 32 3500 >0.020
Alumina 99 Plasma -45 +5 1 60 690-750 300 32 3500 >0.020
Alumina 99 LVCG -45 +5 4 40 690 500 63-125 2000-3000 >0.020
Alumina 99.3 LVCG -22 +5 2 55-60 750 150 16-32 3500 0.02
Alumina 99.3 Plasma -22 +5 >1 65 850-1000 150 16 4500 0.015
Alumina 99.5 Plasma -31 +3.9 >1 65 850-1000 150 16 4500 0.015
Alumina 99.5 LVCG -31 +3.9 2 55-60 75 150 16-32 3500 0.02
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