Composite Diamond Coatings (CDC) Specifications
For Most Ferrous & Non-Ferrous Metals
Suitable Coating Materials
Endura®'s Composite Diamond Coatings can be successfully bonded to most metals and alloys. We regularly treat steel, carbon steel, titanium, stainless steel, aluminum, iron, brass, bronze, copper, Hastelloy™, Inconel™, Monel™, as well as other nickel alloys. Certain metals such as titanium and stainless steel require extensive pretreatments in order to ensure proper adhesion during the coating process, and consequently will be more expensive to process.
The recommended coating thickness for Series 1100 coatings will generally depend on your application and performance requirements. The coating is applied via a time-controlled immersion process allowing us to attain a wide range of thicknesses while still holding tight tolerances. We can apply coating thicknesses from 0.0002" per surface to 0.025" per surface for aggressive wear environments. Our standard coating thickness for this technology platform is 0.002" per surface, with tolerances typically of +/- 0.0001" per surface.
Surface Finish (RMS)
Series 1100 coatings are extremely conformal and uniform and will replicate all existing surface geometries of your tooling. They possess a matte gray metallic color that can be further enhanced through post coating polishing. Post coating surface finishes are largely dictated by the particle size of diamond we choose to specify. The larger the particle size the rougher your surface finish will be post coating. Typically, we specify an average particle size of between 2 – 8 microns (Endura® 1100-2 or Endura® 1100-8), however; if a rougher surface finish is desired particle sizes that measure up to 40 microns are available.
Endura®'s various 1100 Series coatings provide surface hardness measurements of 1200 Vickers on average.
Wear and Abrasion Resistance
Endura®'s Series 1100 coatings afford unrivaled resistance to wear and abrasion, exceeding that of ceramics, chromium or other hardened composite alloys. Listed below are comparative wear index values for our Endura® 1100 Series weighed against other common “wear resistant" coating offerings:
|Coating/Material System||Wear Index|
|Endura 1100-2 (CDC)||0.0115|
|Cemented Tungsten Carbide||0.0274|
|Tool Steel, Hardened Rc 62||0.1281|
*Values above were derived from a Taber abrasive wear test of 1,000 cycles using coated panels which rotate under abrasive wheels. Wear values are derived as a measurement of the panels weight loss over time after a specified number of cycles at a fixed load. (The lower the wear index value, the lower the actual wear.)
Series 1100 CDC Composite Diamond Coatings may provide low coefficients of friction. Values typically range between 0.10 and 0.20, depending on part surface finish and geometry. These values can be reduced even further when combined with Endura's proprietary infused matrix fluoropolymer systems provided in our 1000 Series offerings.
Chemical & Corrosion Resistance
Series 1100 CDC Composite Diamond Coatings are resistant to many chemicals, including some acids, bases, and solvents. The coating provides a barrier layer to help protect components from a wide variety of chemicals and environments. Using salt spray test per ASTM B-117 with a coating thickness of 0.0012 inch, the 1100 series composites have shown to withstand corrosive attack of 500 to 1200 hours.
Operating Temperature Range
Series 1100 coatings will withstand severe temperature extremes without loss in physical properties, and individual coatings are capable of operation at temperatures ranging from cryogenic to near 1,500ºF for maximum working temperature.
Thermal Transfer Prosperities
Series 1100 CDC Composite Diamond Coatings possess excellent thermal transfer properties and high heat conductivity. Thermal/heat transfer properties of our 1100 Series coatings are directly correlated to the density (by volume) of diamond particulates we specify. The higher the density of diamond particulates, the better heat transfer properties you will attain. Our Endura® 1100-2HD, “High Density", Composite Diamond Coating possesses 35% diamond particles by volume and affords unrivaled heat transfer properties.
Critical Factors for Processing Series
Base Metal Surface Requirements
Surface contaminants and imperfections must be removed prior to processing at Endura® Coatings. Given the conformal nature of these coatings any surface irregularities before coating will remain after coating. In order to ensure proper adhesion to your base metal substrate parts also must be free of scale, slag or discoloration associated with heat treat, as well as all magnetism.
Masking of select surfaces where coating voids are required is available. Endura® works with a variety of mediums to mask surfaces where coating is not desired. Depending on your part's geometry and surface characteristics painted-on lacquers, pull-plugs, and custom fabricated fixtures may be used to accomplish the aforesaid. In the event masking is required, highlighted or “marked" prints identifying critical surfaces are extremely helpful in ensuring your parts are processed to spec.
Please complete our Coating Requirement Questionnaire
or call us at 1.800.336.3872 to review & discuss your project requirements.