Nano-scratch testing can be tailored to quantify the adhesion strength of small-scale surface formations, deposits, and structures on a wide range of materials. This article describes the basic measurement technique and presents examples showing how it has been used to evaluate the bonding characteristics of plasma-sprayed Al2O3 splats on steel, osteoblast cells on hydroxyapatite-based coatings, and carbon nanotubes on copper and silicon substrates.

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