Abstract
Physical vapor deposition (PVD) technologies are widely used to produce wear and corrosion resistant coatings for a variety of industrial applications. In recent years, there has been remarkable interest in the development of novel wear resistant coatings prepared through PVD methods, which helps to reduce friction and wear, as a result of recovering energy losses up to 30% due to friction and economy loss due to wear. This chapter provides comprehensive data of recent progress in wear resistant coatings prepared using PVD methods, starting with the introduction of it needs, significance, physiochemical properties, and the selection criteria of wear resistant coatings. The applications, physical, and chemical properties of superhard materials such as diamond like carbon (DLC), titanium nitride (TiN), chromium nitride (CrN), and tantalum nitride (TaN) are also presented.
TopProperties Of Hard Wear Resistant Coatings
The properties of hard wear resistant coatings can be categorized into three ways:
- 1.
Structural and microstructural properties (roughness, thickness, crystal structure, morphology, texture, chemical composition, and surface topography).
- 2.
Physical and chemical properties (density, magnetic, electrical, optical and thermal properties, oxidation and corrosion resistance).
- 3.
Mechanical properties (adhesion, stresses, hardness, wear, fracture toughness, and friction).
Key Terms in this Chapter
Epitaxy: The well-defined orientation of coating growth with respect to the substrate orientation.
Lamellar: A type of microstructure composed of fine and alternative layers in the form of lamellae.
Nanocomposite: The composite which contains at least one phase in nanoscale morphology (nanoparticles, nanotubes, nanorods, etc.).
Columnar: The perpendicular grain growth of coating morphology with respect to substrate.
Erosion: The process of removal of coating materials by means of abrading substances.
Nanocrystalline: The average grain size is less than 100 nm.
Adatom: An atom that lies on the substrate surface.