ASTM F1147: Standard Test Method for Tension Testing of Calcium Phosphate and Metallic Coatings
ISO 13779-4: Implants for surgery - Hydroxyapatite - Part 4: Determination of coating adhesion strength
These test methods cover tension testing of calcium phosphate, metallic porous coatings (ASTM F1147) and hydroxyapatite coatings (ISO 13779) adhering to dense metal substrates at ambient temperatures. It assesses the degree of adhesion of coatings to substrates, or the internal cohesion of a coating in tension normal to the surface plane.
Typically n=6 flat cylindrical coated specimens are glued against a matching counterpart and tested until failure.