Thermal oxidation of Ti1 − xAlxN coatings in air

Vaz, F.; Rebouta, L.; Andritschky, M.; Silva, M.F. da; Soares, J. C.

doi:10.1016/s0955-2219(97)00050-2

Cited by 126 publications

(43 citation statements)

References 17 publications

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“…From outer to inner, the structure is as follows: Al-rich oxide scales, Ti-rich oxide scales mixed with a little Al oxides and residual nitride, nitride layer and substrate. A more interesting phenomenon found was that nitrogen has a tendency to escape from the coating during oxidation, which is close to experimental results published previously [15]. Once protective Al oxides are formed, the diffusion of oxygen and titanium ions would be obstructed, and the phase stability of the B1-NaCl structure for TiAlN is kept in a limited situation.…”

Section: Aes Profile Analysissupporting

confidence: 89%

Effects of Ti0.5Al0.5N coatings on the protecting against oxidation for titanium alloys

Hu²

2010

Rare Metals

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Ti 0.5 Al 0.5 N coatings were deposited on TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) and silicon substrates using a cathode arc ion-plating system. The microstructure, composition, phase structure, and oxidation-resistance of the alloys and nitride coatings were investigated by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, Auger electron spectroscopy, and thermal analyzer. The results show that the oxidation resistance of the titanium alloy is relatively limited; the compound structures of Ti mixed with Al oxides are formed during the heating process. The phases of the Ti 0.5 Al 0.5 N coatings are composed of a TiN solid solution phase. The oxidation kinetics obeys the parabolic law. During the oxidation process, the selective oxidation of Al occurs, thus protecting the underlying coating and substrate.

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Section: Aes Profile Analysissupporting

confidence: 89%

Effects of Ti0.5Al0.5N coatings on the protecting against oxidation for titanium alloys

Hu²

2010

Rare Metals

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“…The aim was to have an Al content close to 60 at. % therefore cathodes containing Ti 29 were mounted at different heights inside the chamber, yielding different compositions depending on where the substrate is placed in front of the cathodes. After evacuating the chamber to a base pressure of 1 mPa the substrates were sputter cleaned through Ar bombardment.…”

Section: Methodsmentioning

confidence: 99%

“…α-Al 2 O 3 is located closest to the surface and TiO 2 is formed below [28]. TiO 2 formation is known to be associated with compressive stress generation during its formation leading to crack formation in the oxide layer [29] resulting in a degraded protection [27]. Eventually the TiO 2 layer emerges to the surface and the oxidation increases rapidly [28].…”

Section: Oxidation Behaviormentioning

confidence: 99%

Effects of Ti alloying of AlCrN coatings on thermal stability and oxidation resistance

et al. 2013

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“…This leads to significant decreasing of hardness and wear resistance [40,42,[44][45][46]. A formation of the two-phase structure В1+В4 leads to decreasing oxidation resistance [40,[47][48][49].…”

Section: Accepted Manuscript Intrmentioning

confidence: 99%

Nanocomposite Nb-Al-N coatings: Experimental and theoretical principles of phase transformations

Pogrebnjak

Rogoz

Иващенко

et al. 2017

Journal of Alloys and Compounds

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Phase transformations of Al doped NbN nanocomposite coatings are studied in detail focusing on their microstructural evolution and phase composition. Several techniques such as XRD, SEM, HR-TEM, Nanoindentation and molecular dynamics simulation are employed in order to understand the phase evolution of the Nb-Al-N system. The nanocomposite structures were formed in the coatings, the roughness of the coatings decreased with increasing the Al concentration due to decreasing grain size. First-principles investigation of Nb-Al-N solid solutions was carried out to interpret film properties. It was found, that for small Al fractions, the solid solutions will form in agreement with our experimental results. The spinodal decomposition of Nb-Al-N solid solutions is supposed to be responsible for the formation of the nanocomosite structure observed in the deposited Nb-Al-N films.

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Thermal oxidation of Ti1 − xAlxN coatings in air

Cited by 126 publications

References 17 publications

Effects of Ti0.5Al0.5N coatings on the protecting against oxidation for titanium alloys

Effects of Ti0.5Al0.5N coatings on the protecting against oxidation for titanium alloys

Effects of Ti alloying of AlCrN coatings on thermal stability and oxidation resistance

Nanocomposite Nb-Al-N coatings: Experimental and theoretical principles of phase transformations

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