Characterization and Performance of AlTiN, AlTiCrN, TiN/TiAlN PVD Coated Carbide Tools While Turning SS 304

Investigation of the Temperature-Related Wear Performance of Hard Nanostructured Coatings Deposited on a S600 High Speed Steel

“…The surface and microstructure characterization were performed by optical profilometry, field-emission gun scanning electron microscopy (FEGSEM), and energy dispersive spectroscopy (EDS).as extensively documented in the literature [12][13][14][15][16][17][18], the nanostructure of thin hard coatings has a remarkable influence on their tribological behavior.Common techniques available to modify the cutting tool substrate include chemical vapor deposition (CVD) and physical vapor deposition (PVD) [19]. Nowadays, PVD technology is preferred over CVD due to the lower operating temperature and the inner environmentally friendly nature of the process [20,21].Nitride-based hard coatings, obtained by a number of PVD processes, have found increasing applications owing to their combination of remarkable properties such as: (i) a high degree of hardness, (ii) excellent wear resistance, and (iii) corrosion resistance [22,23]. TiN was the first commercial PVD coating, firstly deposited back in the early 1980s [24].…”

“…All these coatings showed excellent oxidation resistance [36,37] and good mechanical properties [38]. In particular, superior surface properties have been reported in the literature for the AlTiCrN coating [39] due to the formation of a protective layer made up of stable and dense α(Al,Cr) 2 O 3 mixed oxides, which make it suitable for applications involving temperatures as high as 1100 • C [21].A further development of the mechanical and tribological properties of hard coatings as well as to their range of applicability has been achieved by adding other elements and tailoring the properties of the thin films at an atomic level by designing and producing nanocomposite coatings (Ti-Si-N, Al-Ti-Si-N, and Ti-B-N) [4,40,41]. Starting from the intuition of Koehler [42] and owing to the subsequent pioneering work of Helmersson et al [43], remarkable improvements were possible in the development of superlattice structured hard coatings, which are obtained by the deposition of alternate nanolayers of two materials having the same crystal structure.…”

“…Common techniques available to modify the cutting tool substrate include chemical vapor deposition (CVD) and physical vapor deposition (PVD) [19]. Nowadays, PVD technology is preferred over CVD due to the lower operating temperature and the inner environmentally friendly nature of the process [20,21].…”

“…All these coatings showed excellent oxidation resistance [36,37] and good mechanical properties [38]. In particular, superior surface properties have been reported in the literature for the AlTiCrN coating [39] due to the formation of a protective layer made up of stable and dense α(Al,Cr) 2 O 3 mixed oxides, which make it suitable for applications involving temperatures as high as 1100 • C [21].…”

Electrochemical evaluation of the corrosion protectiveness and porosity of vacuum annealed CrAlN and TiAlN cathodic arc physical vapor deposited coatings

“…The development of CrAlN and TiAlN coatings is a major milestone in the advancement of hard coatings due to their high hardness and thermal stability, excellent wear resistance, improved corrosion, and oxidation resistance, as compared to the conventional binary TiN and CrN coatings . This has been attributed to solid solution strengthening due to the incorporation of a certain amount of an additional element, in this case Al, into the binary system . Thus, the purpose of this study is to investigate the corrosion behavior of CrAlN and TiAlN CA‐PVD coatings after vacuum annealing at various temperatures using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) tests.…”