Microstructure and mechanical properties of nanocrystalline Al–Cr–B–N thin films

Tritremmel, C.; Daniel, Rostislav; Lechthaler, Markus; Rudigier, H.; Polcik, P.; Mitterer, Christian

doi:10.1016/j.surfcoat.2012.09.055

Cited by 29 publications

(17 citation statements)

References 32 publications

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“…The AlCrBN nanocomposite coatings had a high hardness, but they had a lower compressive residual stress [ 14 ] and a lower internal stress of the coating system by >50% [ 15 ]. This improves the hardness [ 7 , 14 , 37 ] and adhesive strength of the AlCrBN coatings [ 7 , 27 ]. The film’s resistance to cracking improves as the H 3 /E * 2 ratio rises [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…In all situations, duplex-coated materials had lower wear volume values by 16% to 31% as compared to only-coated materials, according to the results of wear volume measurement. The AlCrBN coating displayed excellent hardness, low compressive residual stress, good toughness, and good wear resistance by combining the effects of solid solution hardening, grain size refinement (Hall–Petch hardening), and development of nanocomposite structure by boron addition [ 9 , 14 , 15 ]. The production of V 2 O 5 , which can operate as a liquid lubricant and reduce friction coefficients from 0.6–0.8 to 0.2–0.3 at high temperatures (700 °C), was one of the key benefits of the vanadium addition [ 11 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…Sato et al [ 7 ] and Nose et al [ 13 ] reported that boron addition improved the mechanical properties of AlCrN coatings by combining the effects of solid solution hardening, grain size refinement (Hall–Petch hardening), and formation of nanocomposite structure, where a-BNx tissue phase embedded the AlCrN crystallites. The nanocomposite structure of AlCrBN coatings, in which nano-sized fcc AlCrN grains are surrounded by a thin BNx tissue phase, greatly increased the hardness of the AlCrN coatings while reducing compressive residual stress [ 14 ]. At room temperature and at the evaluated temperature (700 °C), AlCrBN coatings have recently been shown to have superhardness and high wear resistance [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Boron and Vanadium Addition on Friction-Wear Properties of the Coating AlCrN for Special Applications

et al. 2021

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Cutting tools have long been coated with an AlCrN hard coating system that has good mechanical and tribological qualities. Boron (B) and vanadium (V) additions to AlCrN coatings were studied for their mechanical and tribological properties. Cathodic multi-arc evaporation was used to successfully manufacture the AlCrBN and AlCrVN coatings. These multicomponent coatings were applied to the untreated and plasma-nitrided surfaces of HS6-5-2 and H13 steels, respectively. Nanoindentation and Vickers micro-hardness tests were used to assess the mechanical properties of the materials. Ball-on-flat wear tests with WC-Co balls as counterparts were used to assess the friction-wear capabilities. Nanoindentation tests demonstrated that AlCrBN coating has a higher hardness (HIT 40.9 GPa) than AlCrVN coating (39.3 GPa). Steels’ wear resistance was significantly increased by a hybrid treatment that included plasma nitriding and hard coatings. The wear volume was 3% better for the AlCrBN coating than for the AlCrVN coating on H13 nitrided steel, decreasing by 89% compared to the untreated material. For HS6-5-2 steel, the wear volume was almost the same for both coatings but decreased by 77% compared to the untreated material. Boron addition significantly improved the mechanical, tribological, and adhesive capabilities of the AlCrN coating.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Boron and Vanadium Addition on Friction-Wear Properties of the Coating AlCrN for Special Applications

et al. 2021

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“…For example, B-alloyed coatings with 2.3-9.1 at.% of B have been demonstrated to have lower compressive state levels compared to unalloyed coatings. The B-alloying also caused grainsize refinement and an increase in hardness attributed to a combination of solid solution hardening and Hall-Petch hardening [89]. Further aspects of alloying will be discussed later in this review.…”

Section: Control Of Coating Morphology Stress and Texturementioning

confidence: 99%

Quo Vadis: AlCr-Based Coatings in Industrial Applications

et al. 2021

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AlCr-based hard nitride coatings with different chemical compositions and architectures have been successfully developed and applied over the last few decades. Coating properties are mainly influenced by deposition conditions and the Al/Cr content. The fcc structure is dominant for an Al-content up to Al0.7Cr0.3N and is preferred for most cutting applications. Different (AlCrX)N alloying concepts, including X = Si, W, B, V, have been investigated in order to enhance oxidation resistance and wear behaviour and to provide tribological properties. AlCr-based oxynitrides and even pure oxides (Al1−xCrx)2O3 with different crystalline structures have been explored. Multi- and nanolayered coatings within the AlCr materials system, as well as in combination with (TiSi)N, for example, have also been implemented industrially. The dominant deposition technology is the vacuum arc process. Recently, advanced high-power impulse magnetron sputtering (HiPIMS) processes have also been successfully applied on an industrial scale. This paper describes basic coating properties and briefly addresses the main aspects of the coating processes as well as selected industrial applications.

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“…It was assumed that boron was primarily accommodated in an amorphous phase of BN. 20 The analysis of the positions of the GAXRD lines from fcc-(Cr,Al)N using the routine described by Rafaja et al 45 revealed a stress-free lattice parameter of (0.4125 ± 0.0003) nm and a compressive residual stress of (−4.9 ± 0.5) GPa assuming a rotationally symmetric biaxial stress state, a Young's modulus of 425 GPa and a Poisson's ratio of 0.22. 46 Due to the nanocomposite character of the Cr-Al-Ti-B-N coating, a high coating hardness was expected-as verified by instrumented nanoindentation experiments.…”

Section: Properties Of Duplex Coatingsmentioning

confidence: 99%

Microstructure and adhesion characteristics of duplex coatings with different plasma‐nitrided layers and a Cr‐Al‐Ti‐B‐N physical vapor deposition coating

Dalke

Weinhold

Schramm

et al. 2021

Engineering Reports

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A duplex treatment consisting of plasma nitriding (PN) and physical vapor deposition (PVD) significantly improves the thermal, tribological, and corrosion resistance of forming tools, and especially if they are intended for applications subject to high mechanical loads. This study investigates the influence of nitriding on the properties of a conventionally heat‐treated AISI D2 tool steel, coated with a Cr‐Al‐Ti‐B‐N layer, while the effect of the presence or absence of a compound layer is discussed. PN is performed at 510–520°C using different N2‐H2 gas mixtures. The Cr‐Al‐Ti‐B‐N layers are deposited at 480°C using a combination of cathodic arc evaporation and magnetron sputtering. The samples are characterized using electron probe microanalysis with wavelength‐dispersive X‐ray spectroscopy, optical and scanning electron microscopy, glancing‐angle X‐ray diffraction, surface hardness measurements, profilometry, Rockwell indentation, and scratch tests. These techniques reveal relationships between the depth gradient of the chemical composition and microstructure of the nitrided interlayer, the adhesion of the PVD coating, and the hardness of the tool steel. Although the PVD process induces a structural transformation in the compound layer, this transition does not have a negative influence on the adhesion of the PVD coating.

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Microstructure and mechanical properties of nanocrystalline Al–Cr–B–N thin films

Cited by 29 publications

References 32 publications

Effect of Boron and Vanadium Addition on Friction-Wear Properties of the Coating AlCrN for Special Applications

Effect of Boron and Vanadium Addition on Friction-Wear Properties of the Coating AlCrN for Special Applications

Quo Vadis: AlCr-Based Coatings in Industrial Applications

Microstructure and adhesion characteristics of duplex coatings with different plasma‐nitrided layers and a Cr‐Al‐Ti‐B‐N physical vapor deposition coating

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