A new low-friction concept for Ti1−xAlxN based coatings in high-temperature applications

Kutschej, K.; Mayrhofer, P.H.; Kathrein, M.; Polcik, P.; Mitterer, Christian

doi:10.1016/j.surfcoat.2004.08.022

Cited by 132 publications

(67 citation statements)

References 15 publications

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“…The friction coefficient observed for TiAlN/VN (V~50 at.%) and Ti-Al-V-N (2.40 at.% ≤ V ≤ 11.10 at.%) exhibited large differences, as described above, suggesting that the presence of Al and/or Ti increases friction at 500 0 C. Increasing V from 2 at.% to 10 at.% in Ti-Al-N led to a decrease in friction from 0.85 to 0.73 at room temperature and 1.10-0.80 at 500 0 C [6]. Further increasing V up to 50 at.% in TiAlN/VN showed a friction coefficient between 0.40 and 0.55 at room temperature, and 0.95 at 500 0 C [5].…”

Section: Introductionsupporting

confidence: 52%

“…High-temperature wear tests of TiAlN/VN multilayer coatings (V~50 at.%) against Al2O3 showed increase of friction coefficient from 0.55 at 25 0 C to 0.96 at 500 0 C, followed by a sharp decrease to 0.18 at 700 0 C [5]. Similarly, wear tests of Ti-Al-V-N monolithic films (2.40 at.% ≤ V ≤ 11.10 at.%) against an Al2O3 ball exhibited friction coefficients in the range of 0.6-0.85 at 25 0 C, which increased to 1.1 at 500 0 C and dropped to the range of 0.8-0.2 at 700 0 C (friction coefficient value depended on the concentration of V) [6]. Wear studies of VN coatings by Gassner et al [7] and Fateh et al [8] confirmed the reduced friction coefficient associated with the formation of lubricious vanadium oxides, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Wear and friction of TiAlN/VN coatings against Al2O3 in air at room and elevated temperatures

et al. 2010

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TiAlN/VN multilayer coatings exhibit excellent dry sliding wear resistance and low friction coefficient, reported to be associated with the formation of self-lubricating V2O5. To investigate this hypothesis, dry sliding ball-on-disc wear tests of TiAlN/VN coatings on flat stainless steel substrates were undertaken against Al2O3 at 25 0 C, 300 0 C and 635 0 C in air. The coating exhibited increased wear rate with temperature. The friction coefficient was 0.53 at 25 0 C, which increased to 1.03 at 300 0 C and decreased to 0.46 at 635 0 C. Detailed investigation of the worn surfaces was undertaken using site-specific transmission electron microscopy (TEM) via focused ion beam (FIB) microscopy, along with Fourier transform infrared (FTIR) and Raman spectroscopy. Microstructure and triboinduced chemical reactions at these temperatures were correlated with the coating's wear and friction behaviour. The friction behaviour at room temperature is attributed to the presence of a thin hydrated tribofilm and the presence of V2O5 at high temperature.

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Section: Introductionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Wear and friction of TiAlN/VN coatings against Al2O3 in air at room and elevated temperatures

et al. 2010

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“…The TiAlN family of PVD coatings, with a favorable combination of hardness and oxidation stability at elevated temperatures, is one of the most used coatings for hard to cut materials [14] showing improved tool life under conditions of machining of aerospace alloys [15]. Jindal et al [16] found that TiAlN coated tools exhibited good cutting performance when turning Inconel 718, AISI 1045 steel and ductile iron at low-and high-cutting speed conditions.…”

Section: Introductionmentioning

confidence: 99%

Analysis of tool wear patterns in finishing turning of Inconel 718

Cantero

Díaz-Álvarez

Miguélez

et al. 2013

Wear

200

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This paper focuses on the analysis of tool wear mechanisms in finishing turning of Inconel 718, one of the most used Ni alloys, both in wet and dry cutting. Cemented carbides, ceramics and CBN tools are suitable for machining Ni alloys; coated carbide tools are competitive for machining operations of Ni alloys and widely used in industry. Commercial coated carbide tools (multilayer coating TiAl/ TiAlN recommended for machining Ni alloys) were studied in this work. The feasibility of two inserts tested for dry cutting of Inconel 718 has been shown in the work. Experimental test were performed in order to analyze wear patterns evolution. It was found great influence of side cutting edge angle in tool wear mode.

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“…The 0 K thermodynamics of quaternary transition metal nitride (Ti-Al-X-N, X=Zr,Hf,V,Nb,Ta) alloys has recently been investigated by Holec using ab initio simulations [86]. Zr improves the oxidation resistance and the as deposited hardness of Ti 1−x Al x N [87,88]; Hf leads to an inferior oxidation resistance of Ti 1−x Al x N and promotes the formation of cubic domains, however it retards the formation of stable wurtzite AlN during thermal annealing [89,90]; The addition of V to Ti 1−x Al x N hard coatings enables lubricating effects based on oxidation resistance and improves the overall wear resistance [91][92][93]; Nb and Ta are also favored due to combining outstanding mechanical properties with good oxidation resistance [94][95][96].…”

Section: Quaternary Nitride Alloysmentioning

confidence: 99%

Properties of multilayered and multicomponent nitride alloys from first principles

Wang¹

2018

Linköping Studies in Science and Technology. Dissertations

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This thesis is a theoretical exploration of properties of multilayered and multicomponent nitride alloys, in particular their mixing thermodynamics and elastic behaviors. Systematic investigation of properties of a large class of materials, such as the multicomponent nitride solid solutions, is in line with the modern approach of high-throughput search of novel materials. In this thesis we benchmark and utilize simple but efficient methodological frameworks in predicting mixing thermodynamics, Young's moduli distribution of multilayer alloys and the linear thermal expansion of quaternary nitride solid solutions.We demonstrate by accurate ab-initio calculations that Ti 1−x Al x N solid solution is stabilized by interfacial effects if it is coherently sandwiched between TiN layers along (001). For TiN/AlN and ZrN/AlN multilayers we show higher thermodynamic stability with semicoherent interfaces than with isostructural coherent ones.Accurate 0 Kelvin elastic constants of cubic Ti x X y Al 1−x−y N (X=Zr, Hf, Nb, V, Ta) solid solutions and their multilayers are derived and an analytic comparison of strengths and ductility are presented to reveal the potential of these materials in hard coating applications. The Young's moduli variation of the bulk materials has provided a reliable descriptor to screen the Young's moduli of coherent multilayers.The Debye model is used to reveal the high-temperature thermodynamics and spinodal decomposition of Ti x Nb y Al 1−x−y N. We show that though the effect of vibration is large on the mixing Gibbs free energy the local spinoal decomposition tendencies are not altered. A quasi-harmonic Debye model is benchmarked against results of molecular dynamics simulations in predicting the thermal expansion coefficients of Ti x X y Al 1−x−y N (X=Zr, Hf, Nb, V, Ta).v Sammanfattning Denna avhandling är en teoretisk undersökning av egenskaperna hos multilager och multikomponentlegeringar av nitrider, särskilt deras blandningstermodynamik och elastiska egenskaper. Systematiska undersökningar av egenskaperna hos en stor materialfamilj, såsom fasta lösningar av multikomponentnitrider, ligger i linje med den moderna angreppsvinkeln av massundersökningar i sökandet efter nya material. I denna avhandling utvärderar och använder vi enkla men effektiva metodologiska ramverk för att förutsäga blandningstermodynamik, fördelning av Young's moduli multilager och den linjära termiska expansionen i kvaternära fasta lösningar av nitrider.Vi visar med precisa ab-initio-beräkningar att en fast lösning av Ti 1−x Al x N stabiliseras av gränssnittseffekter om den placeras koherent mellan TiN-skikt längs med (001). För multilager av TiN/AlN och ZrN/AlN påvisar vi högre termodynamisk stabilitet med semikoherenta gränsskikt än med isostrukturella koherenta. Precisa elastiska konstanter vid 0 K för kubiska fasta lösningar av Ti x X y Al 1−x−y N (X=Zr, Hf, Nb, V, Ta) och deras multilager beräknas och en analytisk jämförelse av deras hållfasthet och duktilitet presenteras för att visa dessa materials potential ...

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A new low-friction concept for Ti1−xAlxN based coatings in high-temperature applications

Cited by 132 publications

References 15 publications

Wear and friction of TiAlN/VN coatings against Al2O3 in air at room and elevated temperatures

Wear and friction of TiAlN/VN coatings against Al2O3 in air at room and elevated temperatures

Analysis of tool wear patterns in finishing turning of Inconel 718

Properties of multilayered and multicomponent nitride alloys from first principles

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