Ceramic nitride/metal coatings with enhanced fracture toughness and fatigue resistance using a multiscalar laminate architecture
by Alan Savan, Jaroslaw Wosik, Yvonne B. Gerbig, Krystina Spiradek-Hahn
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 2, No. 6, 2008

Abstract: Ceramic coatings can provide benefits such as improved wear resistance, reduced friction, and be chemical and biological corrosion barriers in various biomedical applications. However, long-term issues of film cracking, particle generation, or delamination must be addressed, while achieving decades-long coating lifetimes. Instead of brittle, superhard coatings, softer but tougher coatings achieved with multiscalar, laminate architectures may meet these requirements. Layers of Cr and CrN were combined in multi- and nanolayer structures, and compared to monolayer films. The multiscalar coatings had hardness values lying between the pure Cr and CrN, but higher fracture toughness than the monolayer films.

Online publication date: Fri, 26-Dec-2008

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