Author: Omid Rezania
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
Suspension plasma spraying (SPS) is a rising coating technology producing fine nanostructured coatings with promising mechanical and physical properties while taking advantages of the well-established Atmospheric Plasma Spray (APS) process. Anelastic behavior of the coatings can be a specific identifier of their mechanical behavior which is related to the strength of coatings interlayers bonding and defect architecture. To better understand the relationship between SPS conditions and anelastic responses, post-deposition characterization technique under multiple thermal cycles using ex-situ coating property (ECP) sensor, which is based on thermal mismatch strain of coating-substrate system is applied. This technique makes it possible to determine the elastic modulus, non-linear degree and hysteresis degree of the spray coatings through the curvature-temperature response in a dependable and repeatable way. In this work, suspension plasma-sprayed YSZ ceramic coatings are produced under different spray conditions, and their anelastic characteristics are compared. The results show that the samples coated in high plasma power condition have a higher elastic modulus at low strain which is attributed to better inter-splat/inter-layer bonding due to higher particle impact velocity and temperature. However, samples produced in low raster speed condition have a relatively lower elastic modulus and higher compliance at an elevated temperature which describes the higher flexibility of these coating at higher temperature. These results make it possible to better understand the relationship between sprayed coating microstructures and mechanical properties in SPS coatings.
Anelastic Behavior of Suspension Plasma Sprayed Ceramic Coatings
Author: Omid Rezania
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
Suspension plasma spraying (SPS) is a rising coating technology producing fine nanostructured coatings with promising mechanical and physical properties while taking advantages of the well-established Atmospheric Plasma Spray (APS) process. Anelastic behavior of the coatings can be a specific identifier of their mechanical behavior which is related to the strength of coatings interlayers bonding and defect architecture. To better understand the relationship between SPS conditions and anelastic responses, post-deposition characterization technique under multiple thermal cycles using ex-situ coating property (ECP) sensor, which is based on thermal mismatch strain of coating-substrate system is applied. This technique makes it possible to determine the elastic modulus, non-linear degree and hysteresis degree of the spray coatings through the curvature-temperature response in a dependable and repeatable way. In this work, suspension plasma-sprayed YSZ ceramic coatings are produced under different spray conditions, and their anelastic characteristics are compared. The results show that the samples coated in high plasma power condition have a higher elastic modulus at low strain which is attributed to better inter-splat/inter-layer bonding due to higher particle impact velocity and temperature. However, samples produced in low raster speed condition have a relatively lower elastic modulus and higher compliance at an elevated temperature which describes the higher flexibility of these coating at higher temperature. These results make it possible to better understand the relationship between sprayed coating microstructures and mechanical properties in SPS coatings.
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
Suspension plasma spraying (SPS) is a rising coating technology producing fine nanostructured coatings with promising mechanical and physical properties while taking advantages of the well-established Atmospheric Plasma Spray (APS) process. Anelastic behavior of the coatings can be a specific identifier of their mechanical behavior which is related to the strength of coatings interlayers bonding and defect architecture. To better understand the relationship between SPS conditions and anelastic responses, post-deposition characterization technique under multiple thermal cycles using ex-situ coating property (ECP) sensor, which is based on thermal mismatch strain of coating-substrate system is applied. This technique makes it possible to determine the elastic modulus, non-linear degree and hysteresis degree of the spray coatings through the curvature-temperature response in a dependable and repeatable way. In this work, suspension plasma-sprayed YSZ ceramic coatings are produced under different spray conditions, and their anelastic characteristics are compared. The results show that the samples coated in high plasma power condition have a higher elastic modulus at low strain which is attributed to better inter-splat/inter-layer bonding due to higher particle impact velocity and temperature. However, samples produced in low raster speed condition have a relatively lower elastic modulus and higher compliance at an elevated temperature which describes the higher flexibility of these coating at higher temperature. These results make it possible to better understand the relationship between sprayed coating microstructures and mechanical properties in SPS coatings.
Suspension Plasma Spray Coating of Advanced Ceramics
Author: Navid Hosseinabadi
Publisher: CRC Press
ISBN: 1000642259
Category : Technology & Engineering
Languages : en
Pages : 289
Book Description
Suspension Plasma Spray Coating of Advanced Ceramics presents the significance of suspension plasma spray coating of ceramics for thermal barrier applications. It covers suspension formation and optimization in different oxide and non-oxide mixtures and ceramic matrix composites (CMC) of sub-micron and nanosized powders. Enabling readers to understand the importance of thermally inert and insulating ceramic coatings on metals and alloys, the book explains how to improve their utilization in applications, such as turbine blades or diesel engines, gas turbines, and coating methods. This book also discusses advanced topics on nanomaterials coatings in monolithic or composite forms as thermal barriers through organic and non-organic based suspensions using high energy plasma spray methods. Features: Presents significant thermal barrier properties using high energy plasma spray methods. Explores advanced surface modification techniques. Covers monolithic, composite, and solid solution ceramics coating. Discusses high precision coating methods. The book will be useful for professional engineers working in surface modification and researchers studying materials science and engineering, corrosion, and abrasion.
Publisher: CRC Press
ISBN: 1000642259
Category : Technology & Engineering
Languages : en
Pages : 289
Book Description
Suspension Plasma Spray Coating of Advanced Ceramics presents the significance of suspension plasma spray coating of ceramics for thermal barrier applications. It covers suspension formation and optimization in different oxide and non-oxide mixtures and ceramic matrix composites (CMC) of sub-micron and nanosized powders. Enabling readers to understand the importance of thermally inert and insulating ceramic coatings on metals and alloys, the book explains how to improve their utilization in applications, such as turbine blades or diesel engines, gas turbines, and coating methods. This book also discusses advanced topics on nanomaterials coatings in monolithic or composite forms as thermal barriers through organic and non-organic based suspensions using high energy plasma spray methods. Features: Presents significant thermal barrier properties using high energy plasma spray methods. Explores advanced surface modification techniques. Covers monolithic, composite, and solid solution ceramics coating. Discusses high precision coating methods. The book will be useful for professional engineers working in surface modification and researchers studying materials science and engineering, corrosion, and abrasion.
Anelastic Behavior of Thermal Spray Coatings and Associated Relationships with Processing Conditions
Author: Yajie Liu
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Performance of Plasma Sprayed Coating
Author: Zhongyu Piao
Publisher: Springer Nature
ISBN: 9819713676
Category :
Languages : en
Pages : 138
Book Description
Publisher: Springer Nature
ISBN: 9819713676
Category :
Languages : en
Pages : 138
Book Description
Numerical Solution to Phase Change Problem
Author: Amirsaman Farrokhpanah
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A study of flight, impact, and solidification of molten ceramic droplets generated by suspension plasma spraying (SPS) is conducted. A three-dimensional model is developed for predicting behavior of droplets generated by SPS impacting a solid substrate. The model combines Smoothed Particle Hydrodynamics (SPH) integral interpolations with enthalpy formulations to capture the phase change process (solidification/melting). Surface tension is modeled as an internal force between all particles, that will be canceled in the bulk of fluid and generate unbalanced surface tension forces near the free surface. A Finite-Volume solver is also used to predict properties of the droplets at the time of reaching the substrate, i.e. temperature, velocity, and diameter. This solver uses discrete phase models to track flight, evaporation, and atomization of suspension droplets injected into plasma flow. Effects of high temperature gradients and non-continuum on solid particles in plasma flow are taken into account. Results are presented here in three steps. First, the newly developed numerical models for capturing solidification/melting in SPH are validated among various experimental, analytical, and numerical results from literature. These phase change models mainly fall into two main categories: (1) inclusion of latent heat as a source term in the enthalpy equation, (2) inclusion of latent heat by modifying the effective heat capacity in the enthalpy equation. Results confirm accuracy and robustness of the new methods. Secondly, results for droplet generation in SPS are presented. Effects of different parameters on droplets flight and impact are investigated. The goal here is to find suitable operating conditions for the plasma torch and injection process that guarantee impact of high quality droplets on the surface. Effects of injector parameters like injection location, flow rate, and angle along with effects of change in physical properties of droplets are studied. Finally, the newly improved SPH model is used to predict impact of molten ceramic droplets that are collected on the substrate. These cases include predictions for the spread factor and droplet behavior based on their impact velocity and temperature. Results are used to explain different scenarios happening in substrate coating using SPS.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A study of flight, impact, and solidification of molten ceramic droplets generated by suspension plasma spraying (SPS) is conducted. A three-dimensional model is developed for predicting behavior of droplets generated by SPS impacting a solid substrate. The model combines Smoothed Particle Hydrodynamics (SPH) integral interpolations with enthalpy formulations to capture the phase change process (solidification/melting). Surface tension is modeled as an internal force between all particles, that will be canceled in the bulk of fluid and generate unbalanced surface tension forces near the free surface. A Finite-Volume solver is also used to predict properties of the droplets at the time of reaching the substrate, i.e. temperature, velocity, and diameter. This solver uses discrete phase models to track flight, evaporation, and atomization of suspension droplets injected into plasma flow. Effects of high temperature gradients and non-continuum on solid particles in plasma flow are taken into account. Results are presented here in three steps. First, the newly developed numerical models for capturing solidification/melting in SPH are validated among various experimental, analytical, and numerical results from literature. These phase change models mainly fall into two main categories: (1) inclusion of latent heat as a source term in the enthalpy equation, (2) inclusion of latent heat by modifying the effective heat capacity in the enthalpy equation. Results confirm accuracy and robustness of the new methods. Secondly, results for droplet generation in SPS are presented. Effects of different parameters on droplets flight and impact are investigated. The goal here is to find suitable operating conditions for the plasma torch and injection process that guarantee impact of high quality droplets on the surface. Effects of injector parameters like injection location, flow rate, and angle along with effects of change in physical properties of droplets are studied. Finally, the newly improved SPH model is used to predict impact of molten ceramic droplets that are collected on the substrate. These cases include predictions for the spread factor and droplet behavior based on their impact velocity and temperature. Results are used to explain different scenarios happening in substrate coating using SPS.
Thermal and mechanical behaviour of plasma-sprayed oxide ceramic coatings on steels
Author: Murat Vural
Publisher:
ISBN:
Category :
Languages : tr
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : tr
Pages :
Book Description
Structure and Properties of Plasma-sprayed Ceramic Coatings
Author: Narayanasamy Ravi Shankar
Publisher:
ISBN:
Category : Ceramic coating
Languages : en
Pages : 560
Book Description
Publisher:
ISBN:
Category : Ceramic coating
Languages : en
Pages : 560
Book Description
Tribological Properties of Plasma-sprayed Ceramic Coatings
Author: Anil Kumar Murthy
Publisher:
ISBN:
Category :
Languages : en
Pages : 334
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 334
Book Description
An Economic and Engineering Assessment of Plasma-sprayed Ceramic Coatings
Author: Olivier de Botton
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
The Improvement of Plasma-sprayed Ceramic Coatings as Deposited on Metal Substrates
Author: Paul Boland
Publisher:
ISBN:
Category : Ceramic coating
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Ceramic coating
Languages : en
Pages : 64
Book Description