The Experts below are selected from a list of 6942 Experts worldwide ranked by ideXlab platform
B.r. Marple - One of the best experts on this subject based on the ideXlab platform.
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Influence of Particle Temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
Journal of Materials Processing Technology, 2008Co-Authors: M. Gaona, R.s. Lima, B.r. MarpleAbstract:Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti\u20136Al\u20134V substrates. Using in-flight Particle diagnostics, different Particle Temperatures and velocitieswere employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight Particle Temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength valueswere observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.Peer reviewed: YesNRC publication: Ye
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Influence of Particle Temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
Journal of Materials Processing Technology, 2007Co-Authors: M. Gaona, R.s. Lima, B.r. MarpleAbstract:Abstract Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti–6Al–4V substrates. Using in-flight Particle diagnostics, different Particle Temperatures and velocities were employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight Particle Temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength values were observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.
M. Gaona - One of the best experts on this subject based on the ideXlab platform.
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Influence of Particle Temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
Journal of Materials Processing Technology, 2008Co-Authors: M. Gaona, R.s. Lima, B.r. MarpleAbstract:Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti\u20136Al\u20134V substrates. Using in-flight Particle diagnostics, different Particle Temperatures and velocitieswere employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight Particle Temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength valueswere observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.Peer reviewed: YesNRC publication: Ye
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Influence of Particle Temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
Journal of Materials Processing Technology, 2007Co-Authors: M. Gaona, R.s. Lima, B.r. MarpleAbstract:Abstract Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti–6Al–4V substrates. Using in-flight Particle diagnostics, different Particle Temperatures and velocities were employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight Particle Temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength values were observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.
R.s. Lima - One of the best experts on this subject based on the ideXlab platform.
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Influence of Particle Temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
Journal of Materials Processing Technology, 2008Co-Authors: M. Gaona, R.s. Lima, B.r. MarpleAbstract:Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti\u20136Al\u20134V substrates. Using in-flight Particle diagnostics, different Particle Temperatures and velocitieswere employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight Particle Temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength valueswere observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.Peer reviewed: YesNRC publication: Ye
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Influence of Particle Temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
Journal of Materials Processing Technology, 2007Co-Authors: M. Gaona, R.s. Lima, B.r. MarpleAbstract:Abstract Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti–6Al–4V substrates. Using in-flight Particle diagnostics, different Particle Temperatures and velocities were employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight Particle Temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength values were observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.
Zoran Markovic - One of the best experts on this subject based on the ideXlab platform.
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lattice monte carlo simulation of single coal char Particle combustion under oxy fuel conditions
Fuel, 2015Co-Authors: Rastko Jovanović, Ewa Marek, Slobodan Maletić, Dejan Cvetinović, Zoran MarkovicAbstract:A descriptive model for isolated char Particle combustion under conventional and oxy–fuel conditions was developed. Suggested model is based on the percolation theory and Monte Carlo simulation technique. Char Particle was modeled as a square lattice consisting of a large number of small sites. Sites correspond either to fixed carbon, ash, or pore, and they were distributed randomly inside char lattice using percolation concept, at the start of simulation. Random walk model was used to represent gaseous species diffusion through Particle pores. Char combustion was modeled using power law Arrhenius model which assumes that reaction rate depends of Particle Temperature and oxygen partial pressure on Particle surface. The main aim of the proposed model was to take into account influence of heterogeneous char Particle structure to randomness of the char combustion process. The suggested model’s behavior was validated by qualitative comparison with experimental data obtained in single Particle reactor. It was found that simulated combustion time, char burnout and Particle Temperature values are in good agreement with experimentally determined data. Special emphasis was given to the CO2 gasification reaction influence on char conversion and Particle Temperature values. Further development of the proposed model with appropriate simplifications would enable its inclusion in comprehensive CFD codes.
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Lattice Monte Carlo simulation of single coal char Particle combustion under oxy–fuel conditions
Fuel, 2015Co-Authors: Rastko Jovanović, Ewa Marek, Slobodan Maletić, Dejan Cvetinović, Zoran MarkovicAbstract:A descriptive model for isolated char Particle combustion under conventional and oxy–fuel conditions was developed. Suggested model is based on the percolation theory and Monte Carlo simulation technique. Char Particle was modeled as a square lattice consisting of a large number of small sites. Sites correspond either to fixed carbon, ash, or pore, and they were distributed randomly inside char lattice using percolation concept, at the start of simulation. Random walk model was used to represent gaseous species diffusion through Particle pores. Char combustion was modeled using power law Arrhenius model which assumes that reaction rate depends of Particle Temperature and oxygen partial pressure on Particle surface. The main aim of the proposed model was to take into account influence of heterogeneous char Particle structure to randomness of the char combustion process. The suggested model’s behavior was validated by qualitative comparison with experimental data obtained in single Particle reactor. It was found that simulated combustion time, char burnout and Particle Temperature values are in good agreement with experimentally determined data. Special emphasis was given to the CO2 gasification reaction influence on char conversion and Particle Temperature values. Further development of the proposed model with appropriate simplifications would enable its inclusion in comprehensive CFD codes.
Klaus Bauckhage - One of the best experts on this subject based on the ideXlab platform.
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In-situ Particle Temperature, velocity and size measurements in the spray forming process
Materials Science and Engineering: A, 2002Co-Authors: Michaela Krauss, Dirk Bergmann, Udo Fritsching, Klaus BauckhageAbstract:The structure and material properties of spray formed products depend directly on the thermal state of Particles before they impact the substrate or on the already deposited layer. Monitoring Particle Temperature, velocity and size can thus provide a unique tool for optimizing the material properties as well as controlling spraying conditions during deposition. In this paper, an optical sensing device based on the principle of high-speed pyrometry, developed for on-line monitoring of Particle Temperature, velocity and diameter of in-flight Particles during thermal spraying conditions (e.g. plasma guns), is for the first time applied and examined in the spray forming process. Thermal radiation emitted by the Particles is collected by a sensing head attached to the spray cone and transmitted through optical fibers to a detection cabinet located away from the dusty environment. Tests were carried out with different materials, spray pressures and measurement positions to exhibit the efficiency of the measurement system in the spray forming process.
