Thermally induced structural evolution and age-hardening of polycrystalline V1–xMoxN (x ≈ 0.4) thin films

Mikula, Marián; Uzon, Stela; Hudec, Tomáš; Grančič, Branislav; Truchlý, Martin; Роч, Т.; Švec, P.; Satrapinskyy, Leonid; Čaplovičová, Mária; Greczyński, Grzegorz; Petrov, I.; Odén, Magnus; Kúš, P.; Sangiovanni, Davide

doi:10.1016/j.surfcoat.2020.126723

Cited by 12 publications

(6 citation statements)

References 76 publications

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“…Moreover, due to the similar atomic radius of V (0.135 nm) and Mo (0.136 nm), the V atoms tended to dissolve in the Mo-N lattice and formed a single solid solution phase. A similar solid solution phase of c-Mo-V-N was found in the Mo 67 V 4 N 29 coating[18] and the V 0.57 Mo 0.43 N 0.95 coating[30]. Regarding the existence of Cu in the coatings, the chemical bonding states of the Mo-Cu-V-N coatings have been analyzed by XPS in previous work[7], and it was found that Cu existed as a metallic species instead of copper nitride in the coatings.…”

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confidence: 64%

The Additions of V and Cu on the Microstructure and Mechanical Properties of Mo-N Coatings

et al. 2022

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Due to the excellent lubricity of V2O5 and soft metals, V and Cu have been added to Mo-N based coatings to further improve the tribological properties. In this study, the Mo-V-Cu-N coatings were deposited by high power impulse magnetron sputtering (HIPIMS). The effects of V and Cu on the microstructure and mechanical properties of Mo-N coatings were investigated. With increasing V/Cu content ratio, the deposition rate decreased from 15.4 to 6.5 nm/min, and the microstructure transformed from a featureless structure into a dense columnar structure. At low Cu contents, less than 6.5 at.%, the Mo-V-Cu-N coatings exhibited a single solid solution phase of c-Mo2(V)N. When the Cu content reached 29.7 at.%, the Mo45V1Cu30N24 coating showed the lowest surface roughness of 2.0 nm, and the coating changed into a double-phase of c-Mo2(V)N and c-Cu. The adhesion strength gradually increased from 32.2 to 87.8 N with an increasing V/Cu content ratio. Due to the microstructure densification, a maximum hardness of 27.3 GPa was achieved for the Mo46V15Cu1N38 coating, which was accompanied by a high compressive residual stress.

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confidence: 64%

The Additions of V and Cu on the Microstructure and Mechanical Properties of Mo-N Coatings

et al. 2022

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“…When the V content was low, the V atoms in the Mo67V4N29 coating was nearly dissolved in the Mo-N phase [15]. When the V content was high, a single solidsolution phase of c-(V, Mo)N formed in the V0.57Mo0.43N0.95 coating [33]. In this study, the V content was low (4.3-5.2 at.…”

Section: Chemical Composition and Microstructurementioning

confidence: 59%

Effect of Charge Voltage on the Microstructural, Mechanical, and Tribological Properties of Mo–Cu–V–N Nanocomposite Coatings

et al. 2021

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As an important high-power impulse magnetron sputtering (HIPIMS) parameter, charge voltage has a significant influence on the microstructure and properties of hard coatings. In this work, the Mo–Cu–V–N coatings were prepared at various charge voltages using HIPIMS technique to study their mechanical and tribological properties. The microstructure was analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The mechanical and tribological properties were investigated by nano-indentation and ball-on-disc tribometer. The results revealed that all the coatings showed a solid-solution phase of B1-MoVN, the V atoms dissolved into face-centered cubic (FCC) B1-MoN lattice by partial substitution of Mo, and formed a solid-solution phase. Even at a high Cu content (~8.8 at. %), the Cu atoms existed as an amorphous phase. When the charge voltage increased, more energy was put into discharge, and the microstructure changed from coarse structure into dense columnar structure, resulting in the highest hardness of 28.2 GPa at 700 V. An excellent wear performance with low friction coefficient of 0.32 and wear rate of 6.3 × 10−17 m3/N·m was achieved at 750 V, and the wear mechanism was dominated by mild abrasive and tribo-oxidation wear.

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“…The diffraction rings in Figure 3b were recognized as (111), ( 200), (220), and (311) for MoN and (200) for Mo2N phases. Those phases were frequently found in the MoN coating system [14,[33][34][35][36]. In Figure 3c…”

Section: Identification Of Nanostructurementioning

confidence: 85%

Microstructure and Mechanical Properties of Co-Sputtering (Mo, Hf)N Coatings

Hsu

2022

Coatings

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This work focused on the microstructure and mechanical properties of (Mo, Hf)N coatings deposited by radio frequency reactive magnetron co-sputtering technique with input power modulation. The coating characteristics, including indentation hardness, modulus, and tribological behavior, were discussed in terms of deposition parameter, composition, phase, and microstructure. The (Mo, Hf)N thin films were fabricated at a fixed Ar/N2 inlet gas ratio of 12/8 sccm/sccm and modulated input powers. The input power of Mo was fixed at 150 W, while that of the Hf target was managed from 25 to 200 W. The deposition rate and the Hf content of the (Mo, Hf)N coatings increased with input power. The (Mo, Hf)N ternary nitride coatings showed a polycrystalline microstructure with B1-MoN(111), β-Mo2N (112), γ-Mo2N(111), (200), and MoN2(200) phases in X-ray diffraction patterns as input power modulation were 150/25 to 150/100 W/W. The multiple phase microstructure feature and detail crystal development were demonstrated through transmission electron microscopy. According to nanoindentation and wear test results, ternary (Mo, Hf)N coatings represented more improved mechanical characteristics than the MoN and HfN binary nitride films. The 150/100 W/W deposited (Mo, Hf)N coating exhibited a highest hardness of 22.5 GPa when Hf content was at 5.6 at.%. The superior anti-wear behavior of this film with least wear damage was observed as well. The multiphase and solid-solution strengthening of the (Mo, Hf)N coatings, i.e., a microstructure feature of mixed B1-MoN, β-Mo2N, γ-Mo2N, and MoN2 phases and Hf doping in MoN, were the responsible for the superior mechanical and tribological behavior for the (Mo, Hf)N coatings.

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Thermally induced structural evolution and age-hardening of polycrystalline V1–xMoxN (x ≈ 0.4) thin films

Cited by 12 publications

References 76 publications

The Additions of V and Cu on the Microstructure and Mechanical Properties of Mo-N Coatings

The Additions of V and Cu on the Microstructure and Mechanical Properties of Mo-N Coatings

Effect of Charge Voltage on the Microstructural, Mechanical, and Tribological Properties of Mo–Cu–V–N Nanocomposite Coatings

Microstructure and Mechanical Properties of Co-Sputtering (Mo, Hf)N Coatings

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