The Experts below are selected from a list of 45672 Experts worldwide ranked by ideXlab platform
Vasiliy O. Pelenovich - One of the best experts on this subject based on the ideXlab platform.
-
effects of Modulation Period on microstructure mechanical properties of tibn tin nanomultilayered films deposited by multi arc ion plating
Vacuum, 2016Co-Authors: S.y. Zhou, Vasiliy O. Pelenovich, Bin Han, M.i. Yousaf, Shaojian Yan, Canxin TianAbstract:Abstract TiBN/TiN multilayered coating with different Modulation Periods (bilayer thickness) have been synthesized using typical cathodic arc plasma deposition equipment. The objective of this work is to study the influence of Modulation Period on the microstructure, mechanical and tribological properties. TiBN/TiN multilayer coatings exhibited a TiN (111), (200), (220) and TiB 2 (220) crystallographic orientations and preferred TiN (111) orientation. With the decrease of Modulation Period from 12 nm to 1.9 nm, the mole ratio of B increased from 0.079 to 0.162 in addition to the average mole ratio of N was about 0.39 steadily, while the mole ratio of Ti decreased from 0.506 to 0.407. The microstructure of TiBN/TiN multilayered coating evolves form nanocrystalline TiN/a-BN to nanocomposite Ti(B,N) with an dense amorphous BN phase, The maximum values of hardness and elastic modulus reached 31.6 GPa and 336 GPa with a bilayer Period of 1.9 nm and B:Ti ratio of 2:5.
-
Effects of Modulation Period on microstructure, mechanical properties of TiBN/TiN nanomultilayered films deposited by multi arc ion plating
Vacuum, 2016Co-Authors: S.y. Zhou, Vasiliy O. Pelenovich, Bin Han, M.i. Yousaf, Shaojian Yan, Canxin TianAbstract:Abstract TiBN/TiN multilayered coating with different Modulation Periods (bilayer thickness) have been synthesized using typical cathodic arc plasma deposition equipment. The objective of this work is to study the influence of Modulation Period on the microstructure, mechanical and tribological properties. TiBN/TiN multilayer coatings exhibited a TiN (111), (200), (220) and TiB 2 (220) crystallographic orientations and preferred TiN (111) orientation. With the decrease of Modulation Period from 12 nm to 1.9 nm, the mole ratio of B increased from 0.079 to 0.162 in addition to the average mole ratio of N was about 0.39 steadily, while the mole ratio of Ti decreased from 0.506 to 0.407. The microstructure of TiBN/TiN multilayered coating evolves form nanocrystalline TiN/a-BN to nanocomposite Ti(B,N) with an dense amorphous BN phase, The maximum values of hardness and elastic modulus reached 31.6 GPa and 336 GPa with a bilayer Period of 1.9 nm and B:Ti ratio of 2:5.
-
influence of Modulation Period and Modulation ratio on structure and mechanical properties of tibn crn coatings deposited by multi arc ion plating
Applied Surface Science, 2015Co-Authors: Shangru Zhou, Vasiliy O. Pelenovich, Bin Han, Shaojian Yan, Baisong Yang, Baozhu Lin, Z.d. ZhangAbstract:Abstract TiBN/CrN multilayered superlattice coatings with Modulation Periods Λ (bilayer thickness) ranging from 22.5 to 4.2 nm and Modulation ratio R (the thickness ratio of CrN and TiBN layers) ranging from 6:1 to 3:1 were synthesized using an industrial-scale cathodic arc ion plating system in an Ar–N2 gas mixture. X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindention were employed to investigate the influence of Modulation Period and ratio on microstructure and mechanical properties of the multilayers. The sharp interfaces and nanoscale multilayered Modulation were confirmed by TEM. TiBN/CrN multilayer coatings were crystallized with orientations at the (1 1 1), (2 0 0) and (2 2 0) crystallographic planes and the microstructure was strengthened at (2 0 0) preferred orientation. The maximum hardness of 38.6 GPa and elastic modulus of 477 GPa were obtained at Λ = 11.7 nm and R = 5:1. The lowest value of the friction coefficient at 0.32 sliding against a WC-Co ball was obtained at a bilayer Period of 11.7 nm, compared to those of the coatings with other Modulation Periods and monolithic coatings. The wear rate of the multilayered coatings was also lower than those of the monolithic CrN and TiBN coatings.
-
Influence of Modulation Period and Modulation ratio on structure and mechanical properties of TiBN/CrN coatings deposited by multi-arc ion plating
Applied Surface Science, 2015Co-Authors: Shangru Zhou, Bin Han, Shaojian Yan, Baisong Yang, Baozhu Lin, Z.d. Zhang, Vasiliy O. PelenovichAbstract:Abstract TiBN/CrN multilayered superlattice coatings with Modulation Periods Λ (bilayer thickness) ranging from 22.5 to 4.2 nm and Modulation ratio R (the thickness ratio of CrN and TiBN layers) ranging from 6:1 to 3:1 were synthesized using an industrial-scale cathodic arc ion plating system in an Ar–N2 gas mixture. X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindention were employed to investigate the influence of Modulation Period and ratio on microstructure and mechanical properties of the multilayers. The sharp interfaces and nanoscale multilayered Modulation were confirmed by TEM. TiBN/CrN multilayer coatings were crystallized with orientations at the (1 1 1), (2 0 0) and (2 2 0) crystallographic planes and the microstructure was strengthened at (2 0 0) preferred orientation. The maximum hardness of 38.6 GPa and elastic modulus of 477 GPa were obtained at Λ = 11.7 nm and R = 5:1. The lowest value of the friction coefficient at 0.32 sliding against a WC-Co ball was obtained at a bilayer Period of 11.7 nm, compared to those of the coatings with other Modulation Periods and monolithic coatings. The wear rate of the multilayered coatings was also lower than those of the monolithic CrN and TiBN coatings.
Shaojian Yan - One of the best experts on this subject based on the ideXlab platform.
-
effects of Modulation Period on microstructure mechanical properties of tibn tin nanomultilayered films deposited by multi arc ion plating
Vacuum, 2016Co-Authors: S.y. Zhou, Vasiliy O. Pelenovich, Bin Han, M.i. Yousaf, Shaojian Yan, Canxin TianAbstract:Abstract TiBN/TiN multilayered coating with different Modulation Periods (bilayer thickness) have been synthesized using typical cathodic arc plasma deposition equipment. The objective of this work is to study the influence of Modulation Period on the microstructure, mechanical and tribological properties. TiBN/TiN multilayer coatings exhibited a TiN (111), (200), (220) and TiB 2 (220) crystallographic orientations and preferred TiN (111) orientation. With the decrease of Modulation Period from 12 nm to 1.9 nm, the mole ratio of B increased from 0.079 to 0.162 in addition to the average mole ratio of N was about 0.39 steadily, while the mole ratio of Ti decreased from 0.506 to 0.407. The microstructure of TiBN/TiN multilayered coating evolves form nanocrystalline TiN/a-BN to nanocomposite Ti(B,N) with an dense amorphous BN phase, The maximum values of hardness and elastic modulus reached 31.6 GPa and 336 GPa with a bilayer Period of 1.9 nm and B:Ti ratio of 2:5.
-
Effects of Modulation Period on microstructure, mechanical properties of TiBN/TiN nanomultilayered films deposited by multi arc ion plating
Vacuum, 2016Co-Authors: S.y. Zhou, Vasiliy O. Pelenovich, Bin Han, M.i. Yousaf, Shaojian Yan, Canxin TianAbstract:Abstract TiBN/TiN multilayered coating with different Modulation Periods (bilayer thickness) have been synthesized using typical cathodic arc plasma deposition equipment. The objective of this work is to study the influence of Modulation Period on the microstructure, mechanical and tribological properties. TiBN/TiN multilayer coatings exhibited a TiN (111), (200), (220) and TiB 2 (220) crystallographic orientations and preferred TiN (111) orientation. With the decrease of Modulation Period from 12 nm to 1.9 nm, the mole ratio of B increased from 0.079 to 0.162 in addition to the average mole ratio of N was about 0.39 steadily, while the mole ratio of Ti decreased from 0.506 to 0.407. The microstructure of TiBN/TiN multilayered coating evolves form nanocrystalline TiN/a-BN to nanocomposite Ti(B,N) with an dense amorphous BN phase, The maximum values of hardness and elastic modulus reached 31.6 GPa and 336 GPa with a bilayer Period of 1.9 nm and B:Ti ratio of 2:5.
-
influence of Modulation Period and Modulation ratio on structure and mechanical properties of tibn crn coatings deposited by multi arc ion plating
Applied Surface Science, 2015Co-Authors: Shangru Zhou, Vasiliy O. Pelenovich, Bin Han, Shaojian Yan, Baisong Yang, Baozhu Lin, Z.d. ZhangAbstract:Abstract TiBN/CrN multilayered superlattice coatings with Modulation Periods Λ (bilayer thickness) ranging from 22.5 to 4.2 nm and Modulation ratio R (the thickness ratio of CrN and TiBN layers) ranging from 6:1 to 3:1 were synthesized using an industrial-scale cathodic arc ion plating system in an Ar–N2 gas mixture. X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindention were employed to investigate the influence of Modulation Period and ratio on microstructure and mechanical properties of the multilayers. The sharp interfaces and nanoscale multilayered Modulation were confirmed by TEM. TiBN/CrN multilayer coatings were crystallized with orientations at the (1 1 1), (2 0 0) and (2 2 0) crystallographic planes and the microstructure was strengthened at (2 0 0) preferred orientation. The maximum hardness of 38.6 GPa and elastic modulus of 477 GPa were obtained at Λ = 11.7 nm and R = 5:1. The lowest value of the friction coefficient at 0.32 sliding against a WC-Co ball was obtained at a bilayer Period of 11.7 nm, compared to those of the coatings with other Modulation Periods and monolithic coatings. The wear rate of the multilayered coatings was also lower than those of the monolithic CrN and TiBN coatings.
-
Influence of Modulation Period and Modulation ratio on structure and mechanical properties of TiBN/CrN coatings deposited by multi-arc ion plating
Applied Surface Science, 2015Co-Authors: Shangru Zhou, Bin Han, Shaojian Yan, Baisong Yang, Baozhu Lin, Z.d. Zhang, Vasiliy O. PelenovichAbstract:Abstract TiBN/CrN multilayered superlattice coatings with Modulation Periods Λ (bilayer thickness) ranging from 22.5 to 4.2 nm and Modulation ratio R (the thickness ratio of CrN and TiBN layers) ranging from 6:1 to 3:1 were synthesized using an industrial-scale cathodic arc ion plating system in an Ar–N2 gas mixture. X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindention were employed to investigate the influence of Modulation Period and ratio on microstructure and mechanical properties of the multilayers. The sharp interfaces and nanoscale multilayered Modulation were confirmed by TEM. TiBN/CrN multilayer coatings were crystallized with orientations at the (1 1 1), (2 0 0) and (2 2 0) crystallographic planes and the microstructure was strengthened at (2 0 0) preferred orientation. The maximum hardness of 38.6 GPa and elastic modulus of 477 GPa were obtained at Λ = 11.7 nm and R = 5:1. The lowest value of the friction coefficient at 0.32 sliding against a WC-Co ball was obtained at a bilayer Period of 11.7 nm, compared to those of the coatings with other Modulation Periods and monolithic coatings. The wear rate of the multilayered coatings was also lower than those of the monolithic CrN and TiBN coatings.
Bin Han - One of the best experts on this subject based on the ideXlab platform.
-
effects of Modulation Period on microstructure mechanical properties of tibn tin nanomultilayered films deposited by multi arc ion plating
Vacuum, 2016Co-Authors: S.y. Zhou, Vasiliy O. Pelenovich, Bin Han, M.i. Yousaf, Shaojian Yan, Canxin TianAbstract:Abstract TiBN/TiN multilayered coating with different Modulation Periods (bilayer thickness) have been synthesized using typical cathodic arc plasma deposition equipment. The objective of this work is to study the influence of Modulation Period on the microstructure, mechanical and tribological properties. TiBN/TiN multilayer coatings exhibited a TiN (111), (200), (220) and TiB 2 (220) crystallographic orientations and preferred TiN (111) orientation. With the decrease of Modulation Period from 12 nm to 1.9 nm, the mole ratio of B increased from 0.079 to 0.162 in addition to the average mole ratio of N was about 0.39 steadily, while the mole ratio of Ti decreased from 0.506 to 0.407. The microstructure of TiBN/TiN multilayered coating evolves form nanocrystalline TiN/a-BN to nanocomposite Ti(B,N) with an dense amorphous BN phase, The maximum values of hardness and elastic modulus reached 31.6 GPa and 336 GPa with a bilayer Period of 1.9 nm and B:Ti ratio of 2:5.
-
Effects of Modulation Period on microstructure, mechanical properties of TiBN/TiN nanomultilayered films deposited by multi arc ion plating
Vacuum, 2016Co-Authors: S.y. Zhou, Vasiliy O. Pelenovich, Bin Han, M.i. Yousaf, Shaojian Yan, Canxin TianAbstract:Abstract TiBN/TiN multilayered coating with different Modulation Periods (bilayer thickness) have been synthesized using typical cathodic arc plasma deposition equipment. The objective of this work is to study the influence of Modulation Period on the microstructure, mechanical and tribological properties. TiBN/TiN multilayer coatings exhibited a TiN (111), (200), (220) and TiB 2 (220) crystallographic orientations and preferred TiN (111) orientation. With the decrease of Modulation Period from 12 nm to 1.9 nm, the mole ratio of B increased from 0.079 to 0.162 in addition to the average mole ratio of N was about 0.39 steadily, while the mole ratio of Ti decreased from 0.506 to 0.407. The microstructure of TiBN/TiN multilayered coating evolves form nanocrystalline TiN/a-BN to nanocomposite Ti(B,N) with an dense amorphous BN phase, The maximum values of hardness and elastic modulus reached 31.6 GPa and 336 GPa with a bilayer Period of 1.9 nm and B:Ti ratio of 2:5.
-
influence of Modulation Period and Modulation ratio on structure and mechanical properties of tibn crn coatings deposited by multi arc ion plating
Applied Surface Science, 2015Co-Authors: Shangru Zhou, Vasiliy O. Pelenovich, Bin Han, Shaojian Yan, Baisong Yang, Baozhu Lin, Z.d. ZhangAbstract:Abstract TiBN/CrN multilayered superlattice coatings with Modulation Periods Λ (bilayer thickness) ranging from 22.5 to 4.2 nm and Modulation ratio R (the thickness ratio of CrN and TiBN layers) ranging from 6:1 to 3:1 were synthesized using an industrial-scale cathodic arc ion plating system in an Ar–N2 gas mixture. X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindention were employed to investigate the influence of Modulation Period and ratio on microstructure and mechanical properties of the multilayers. The sharp interfaces and nanoscale multilayered Modulation were confirmed by TEM. TiBN/CrN multilayer coatings were crystallized with orientations at the (1 1 1), (2 0 0) and (2 2 0) crystallographic planes and the microstructure was strengthened at (2 0 0) preferred orientation. The maximum hardness of 38.6 GPa and elastic modulus of 477 GPa were obtained at Λ = 11.7 nm and R = 5:1. The lowest value of the friction coefficient at 0.32 sliding against a WC-Co ball was obtained at a bilayer Period of 11.7 nm, compared to those of the coatings with other Modulation Periods and monolithic coatings. The wear rate of the multilayered coatings was also lower than those of the monolithic CrN and TiBN coatings.
-
Influence of Modulation Period and Modulation ratio on structure and mechanical properties of TiBN/CrN coatings deposited by multi-arc ion plating
Applied Surface Science, 2015Co-Authors: Shangru Zhou, Bin Han, Shaojian Yan, Baisong Yang, Baozhu Lin, Z.d. Zhang, Vasiliy O. PelenovichAbstract:Abstract TiBN/CrN multilayered superlattice coatings with Modulation Periods Λ (bilayer thickness) ranging from 22.5 to 4.2 nm and Modulation ratio R (the thickness ratio of CrN and TiBN layers) ranging from 6:1 to 3:1 were synthesized using an industrial-scale cathodic arc ion plating system in an Ar–N2 gas mixture. X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindention were employed to investigate the influence of Modulation Period and ratio on microstructure and mechanical properties of the multilayers. The sharp interfaces and nanoscale multilayered Modulation were confirmed by TEM. TiBN/CrN multilayer coatings were crystallized with orientations at the (1 1 1), (2 0 0) and (2 2 0) crystallographic planes and the microstructure was strengthened at (2 0 0) preferred orientation. The maximum hardness of 38.6 GPa and elastic modulus of 477 GPa were obtained at Λ = 11.7 nm and R = 5:1. The lowest value of the friction coefficient at 0.32 sliding against a WC-Co ball was obtained at a bilayer Period of 11.7 nm, compared to those of the coatings with other Modulation Periods and monolithic coatings. The wear rate of the multilayered coatings was also lower than those of the monolithic CrN and TiBN coatings.
Marc Sciamanna - One of the best experts on this subject based on the ideXlab platform.
-
Transverse mode competition effects on the dynamics of gain-switched vertical-cavity surface-emitting lasers
Applied Physics Letters, 2008Co-Authors: Ángel Valle, Mikel Arizaleta Arteaga, Krassimir Panajotov, Hugo Thienpont, Marc SciamannaAbstract:An experimental analysis of the nonlinear dynamics of a multi-transverse-mode vertical-cavity surface-emitting laser (VCSEL) when subject to a high-frequency current Modulation is performed. Regular Periodic dynamics—with Periods equal to the Modulation Period or twice the Modulation Period—and irregular pulsating dynamics are obtained. Our results show that the irregular pulsating dynamics in multimode VCSELs subject to large-signal current Modulation is due to the competition between different transverse modes.
-
Experimental study of transverse mode dynamics in vertical-cavity surface-emitting lasers under current Modulation
2008Co-Authors: Ángel Valle, Mikel Arizaleta Arteaga, Krassimir Panajotov, Marc SciamannaAbstract:In this work we report on an experimental investigation of the nonlinear dynamics of a 850 nm multitransverse mode vertical-cavity surface-emitting laser (VCSEL) when subject to high-frequency current Modulation. Different frequencies and Modulation amplitudes are applied to the VCSEL. Regular Periodic dynamics - with Periods equal to the Modulation Period or twice the Modulation Period - and irregular pulsating dynamics are obtained. Different dynamical behaviors are illustrated by using power time traces, radio-frequency spectra and bifurcation diagrams. Our results show that irregular pulsating dynamics in multimode VCSELs subject to large-signal current modulatton can be obtained due to the competition between different transverse modes.
Ruiqi Shen - One of the best experts on this subject based on the ideXlab platform.
-
optimisation of Modulation Period of tio2 al reactive multilayer films for laser driven flyer plates
Chemical Engineering Journal, 2019Co-Authors: Wei Guo, Ningxi Meng, Yiru Chen, Xiang Zhou, Wei Zhang, Ruiqi ShenAbstract:Abstract Reactive multilayer films (RMFs) are a type of energetic nano-composite material and can be integrated into ablative layer structures using micro-electro-mechanical systems technology. They could potentially be applied to a laser-driven flyer detonator. In this study, TiO2/Al-based RMFs with two different Modulation Periods were integrated into multilayer flyer plates using magnetron sputtering technology, which produced nano-energetic multilayer films with optimised performance for laser-driven flyer plate systems. The effects of the TiO2/Al RMFs on the laser-driven properties of the RMF flyer were then systematically investigated in terms of the electron temperature and density using laser-induced breakdown spectroscopy. Measurements of the RMF flyer velocity were performed using a photonic Doppler velocimetry system. Electron temperatures of 6331.2–10563.0 K, electron densities of 4.03–12.69 × 1015 cm−3, and flyer velocities of 3854.7–6417.7 m/s were produced in the RMFs merely by changing the Modulation Period of the TiO2/Al RMF. This behaviour was also consistent with that found using a thermal conduction model in combination with a mass-diffusion reaction model. The RMF flyer exhibited a high level of integrity and promoted laser-driven energy efficiency, which are significant for improving the performance of a laser-driven flyer detonator for military and civilian applications.
-
Optimisation of Modulation Period of TiO2/Al reactive multilayer films for laser-driven flyer plates
Chemical Engineering Journal, 2019Co-Authors: Wei Guo, Ningxi Meng, Yiru Chen, Xiang Zhou, Zhang Wei, Ruiqi ShenAbstract:Abstract Reactive multilayer films (RMFs) are a type of energetic nano-composite material and can be integrated into ablative layer structures using micro-electro-mechanical systems technology. They could potentially be applied to a laser-driven flyer detonator. In this study, TiO2/Al-based RMFs with two different Modulation Periods were integrated into multilayer flyer plates using magnetron sputtering technology, which produced nano-energetic multilayer films with optimised performance for laser-driven flyer plate systems. The effects of the TiO2/Al RMFs on the laser-driven properties of the RMF flyer were then systematically investigated in terms of the electron temperature and density using laser-induced breakdown spectroscopy. Measurements of the RMF flyer velocity were performed using a photonic Doppler velocimetry system. Electron temperatures of 6331.2–10563.0 K, electron densities of 4.03–12.69 × 1015 cm−3, and flyer velocities of 3854.7–6417.7 m/s were produced in the RMFs merely by changing the Modulation Period of the TiO2/Al RMF. This behaviour was also consistent with that found using a thermal conduction model in combination with a mass-diffusion reaction model. The RMF flyer exhibited a high level of integrity and promoted laser-driven energy efficiency, which are significant for improving the performance of a laser-driven flyer detonator for military and civilian applications.