Ceramic nitride/metal coatings with enhanced fracture toughness and fatigue resistance using a multiscalar laminate architecture. (29th December 2008)

• Record Type: Journal Article
• Authors: Savan, Alan; Wosik, Jaroslaw; Gerbig, Yvonne B.; Spiradek-Hahn, Krystina
• Is Part Of: International journal of surface science and engineering. Volume 2:Number 6(2008)
• Page Start: 419
• Page End: 438
• Publication Date: 2008-12-29
• Subjects: ceramic nitride -- ceramic coatings -- fracture toughness -- fatigue resistance -- multilayer structures -- nanolayer structures -- multiscalar coatings -- hardness -- biomedical applications; Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Surfaces (Technology) -- Periodicals; Tribology -- Periodicals; 530.417
• Languages: English
• ISSNs: 1749-785X

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.