Excellent abrasion resistance, including resistance to sliding wear Corrosion resistance Increased ductility Excellent release properties Very high bond strength HVOF Application High-velocity, oxy fuel-deposited Liquidmetal-Armacor Coatings offer a high density, low porosity, crack-free coating that provides excellent erosion and corrosion resistance and a very low coefficient of friction. Liquidmetal-Armacor Coatings maintain this very smooth surface profile throughout service life. Fig. a The ASTM G-65 test utilizes a dry sand rotating rubber wheel with a 30 lbs. load. The wheel rotated at 200 RPM for 70 minutes, a total of 2000 revolutions. AISI 8620 steel data shown for comparison. Benefits of Amorphous Coatings Liquidmetal-Armacor Coating powders undergo a surface transformation when ground or abraded. They transform at the surface from a two-phase crystalline material to a homogenous amorphous/nanochrystal structure. This transformation is 2 - 5 microns in depth and continually renews throughout the thickness of the coating.

An amorphous, or glass-like, surface possesses very few surface asperities due to a reduction of grain boundaries prevalent in crystalline materials. Engineering Data Microhardness 1200 - 1400 Rc 72 - 74 Coefficient of Friction 0.09 Porosity <1 Finishing <2 RMS Bond Strength 8000 psi Liquidmetal-Armacor Coatings' patented rapid solidification process offers a sprayed coating with very little shrinkage, enhancing bond strength, and allowing repeated thermal cycling without sparring. Expansion coefficient values are similar to that of carbon steel. Transformed surface hardness provides excellent wear properties, while bulk hardness remains at a level to provide a tough support structure. Liquidmetal-Armacor Coatings' wear resistance as HVOF-applied is demonstrated by the G-65 abrasion test (fig. a). Finishing Liquidmetal-Armacor Coatings may be finished to specification for the most critical applications. The photograph above illustrates as sprayed, polished and diamond superfinished.

Liquidmetal-Armacor Coatings powders may be applied to a wide variety of substrates for use in industrial environments. The unique amorphous coatings provide wear and corrosion resistance, even at high temperature.

Liquidmetal-Armacor Coatings as applied by high velocity oxy fuel (HVOF) have very high hardness and density. HVOF application for amenable parts offers an effective replacement for chromium plating. The coatings offer higher hardness values and improved corrosion resistance, particularly in chlorides, and may be polished to a comparable finish. Liquidmetal-Armacor Coatings' hardness, combined with a resistance to galling and adhesive wear, can outperform tungsten carbide containing alloys when component degradation is due to erosion.

• Hardness/Density - Liquidmetal-Armacor HVOF powders offer high hardness (1100-1400 Hv) to provide excellent abrasion and erosion resistance. The material produces a highly dense coating, 0% porosity and minimal oxides.

• Corrosion Resistance - Liquidmetal-Armacor Coatings have excellent corrosion resistance in a wide range of oxidizing as well as reducing aqueous environments. Both Liquidmetal-Armacor M and Liquidmetal-Armacor C⁺ will spontaneously passivate in the presence of air or oxidizing solutions. Liquidmetal-Armacor M is especially resistant to attack by sulfuric acid and organic acids, while Liquidmetal-Armacor C⁺ exhibits outstanding performance in strong caustic solutions.

• Anti-Galling/Low Friction - The galling threshold of Liquidmetal-Armacor M exceeds 50,000 psi, offering a highly stable bearing surface. Liquidmetal-Armacor Coatings possess excellent metal-to-metal wear characteristics.

• Bond Strength - Low shrinkage creates coatings in compression, resulting in very high bond strengths to a variety of substrates and excellent resistance to thermal cycling.

• Finishing - Liquidmetal-Armacor Coatings may be finished to Ra by grinding and polishing.