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Engineering Conferences International

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Articles 1531 - 1560 of 2957

Full-Text Articles in Engineering

Application Of Eq Bond Coat To Eb-Pvd Tbc Systems, Kazuhide Matsumoto, Kyoko Kawagishi, Yutaka Koizumi, Hiroshi Harada Jun 2014

Application Of Eq Bond Coat To Eb-Pvd Tbc Systems, Kazuhide Matsumoto, Kyoko Kawagishi, Yutaka Koizumi, Hiroshi Harada

Thermal Barrier Coatings IV

To prevent the formation of SRZ in the log-time high-temperature exposure of the turbine blades, thermodynamically equilibrium phase such as gamma-prime phase of the substrate is use as an oxidation-resistant bond coat. The previous study clarified that this EQ coating shows excellent interface stability and it does not degrade mechanical strength due to the SRZ formation. In this study, TBC life test of EB-PVD ceramics coated EQ coating is investigated with other conventional MCrAlY coatings. The 4th and 5th generation superalloys are used for substrates. About 150 μm thick of EQ coating, conventional NiCoCrAlY and CoNiCrAlY coating are deposited by …


The Role Of Reactive Elements In Improving The Cyclic Oxidation Performance Of Β- Nial Coatings, Hongbo Guo, Hui Peng, Dongqing Li, Tian Zhang, Shengkai Gong Jun 2014

The Role Of Reactive Elements In Improving The Cyclic Oxidation Performance Of Β- Nial Coatings, Hongbo Guo, Hui Peng, Dongqing Li, Tian Zhang, Shengkai Gong

Thermal Barrier Coatings IV

the bond coat in thermal barrier coating (TBC) system. However, the oxide scale grown on NiAl spalls readily during high-temperature cyclic oxidation. Reactive elements (REs) as well as their oxides dispersions were investigated to improve the cyclic oxidation performance. In this work, the effects of several REs on the adherence of Al2O3/NiAl interface were investigated by first principles theory calculations and experiments. We find that the solubility of the REs in NiAl alloy arrive at an order of Hf >Zr>Dy>Y>La, all the REs exhibit an affinity for sulfur, with an order of La>Dy>Y>Zr>Hf, …


A Recent History Of Thermal Barrier Coatings For Aero-Propulsion Applications, Brian Hazel, Michael J. Maloney Jun 2014

A Recent History Of Thermal Barrier Coatings For Aero-Propulsion Applications, Brian Hazel, Michael J. Maloney

Thermal Barrier Coatings IV

Thermal barrier coatings for aero-propulsion operation have been in use since the 1960s. These thermal barrier coatings are composed of an oxidation resistant metallic base layer and a thermally resistant ceramic top layer. The development and implementation of advances in both the metallic base and the ceramic top layer will be explored. The evolution has included performance and durability improvements, process advances, and understanding and evolution of failure modes. More recent efforts have focus on future challenges for thermal barrier coatings to meet ever increasing operating temperature demands of future applications.


Potential Impacts Of Alternative Fuels On The Evolution And Stability Of Turbine Hot- Section Materials, Daniel Mumm, Timothy Montalbano, Matthew Sullivan Jun 2014

Potential Impacts Of Alternative Fuels On The Evolution And Stability Of Turbine Hot- Section Materials, Daniel Mumm, Timothy Montalbano, Matthew Sullivan

Thermal Barrier Coatings IV

This talk will provide an overview of a research program focused on evaluating the potential impacts of alternative fuels (coal-derived syngas, high-hydrogen content fuels, bio-derived synthetics) on the degradation of hot-section materials through accelerated attack of protective thermally grown oxides (TGOs) and thermal barrier coating (TBC) systems. A primary focus is the role of elevated water vapor levels, volatility, and vapor phase transport processes on the evolution of TGO and TBC systems. Materials exposure studies will be described that demonstrate that differing simulated combustion environments affect both the growth rate and the stability of the resulting thermally grown oxides. In …


On The Behavior Of Titanium Within Thermal Barrier Coatings And Its Influence On Residual Stress Within The Tgo, Robbie J. Bennett, Ian Edmonds, Neil Jones, Catherine Rae Jun 2014

On The Behavior Of Titanium Within Thermal Barrier Coatings And Its Influence On Residual Stress Within The Tgo, Robbie J. Bennett, Ian Edmonds, Neil Jones, Catherine Rae

Thermal Barrier Coatings IV

This research focuses on analysing the interaction between three commercially used diffusion coatings and a nickel based superalloy CMSX-4. The coatings applied are alumide, Pt-alumide and Pt-modifed γ/γ′. The research has two main themes, firstly diffusion and secondly oxidation. Results of quantitative EPMA show that titanium diffusion towards the surface varies between coatings, and has a strong correlation with the use of platinum within coatings. The concentrations of Ti within Pt-aluminide coatings after 100 hours oxidation in air at 1100°C were found to be twice as high as those within the plain aluminised CMSX-4 samples. Furthermore uphill diffusion of Ti …


The Effect Of Environment And Superalloy Composition On Tbc Lifetime, Bruce Pint, Kinga Unocic, Michael Lance, J. Allen Haynes Jun 2014

The Effect Of Environment And Superalloy Composition On Tbc Lifetime, Bruce Pint, Kinga Unocic, Michael Lance, J. Allen Haynes

Thermal Barrier Coatings IV

While the water vapor content of the combustion gas in natural gas-fired land based turbines is ~10%, it can be 20-85% with coal-derived (syngas or H2) fuels or innovative turbine concepts for more efficient carbon capture. Additional concepts envisage working fluids with high CO2 contents to facilitate carbon capture and sequestration. Also, for land-based, power-generation turbines, there is industry interest in reducing alloy costs by decreasing the superalloy Re content, either by developing new alloys or employing earlier generation superalloys. To investigate the effects of these variables on thermal barrier coating (TBC) lifetime, furnace cycling tests (1h cycles) were performed …


High-Temperature Ceramic Coatings Used In Aero Engine Environments, David Rickerby, Paul Morrell, Matthew Hancock Jun 2014

High-Temperature Ceramic Coatings Used In Aero Engine Environments, David Rickerby, Paul Morrell, Matthew Hancock

Thermal Barrier Coatings IV

This paper reviews the role of ceramic coatings technology in the hot sections of modern gas turbine engines by contrasting the role of surface engineering and coatings away from secondary reliance (i.e. the coating extending the life of the component and when the coating is lost or fails there is still an appreciable remnant life of the component) to prime reliance where the failure of the coating would result in a rapid failure of the component. To illustrate this change in design philosophy, the coating systems deployed in the HP turbine module in both shrouded and unshrouded configurations are discussed …


Fate And Transport Of Nanohybrids In Subsurface Media For Oil Field Applications, M.J. Kadhum, D.P. Swatske, J.H. Harwell, D.E. Resasco, B.J. Shiau Jun 2014

Fate And Transport Of Nanohybrids In Subsurface Media For Oil Field Applications, M.J. Kadhum, D.P. Swatske, J.H. Harwell, D.E. Resasco, B.J. Shiau

5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry

Interfacially active carbon nanotube hybrids have potential to be used in reservoir development applications. Carbon nanotubes hybrids (CNT) can act as carriers for catalytic nanoparticles into regions far inside the reservoir; they have the ability to stabilize water/oil interface in emulsions or can be used as contrast agents or sensors. One of the main challenges for successful utilization of these nanoparticles is the difficulty associated with stabilizing their dispersions and propagating them through the wellbore rock or deep inside the reservoir in harsh reservoir conditions of salinity and temperature. In this work, CNT were dispersed in high salinity brine using …


Particles Migrating And Plugging Mechanism In Loosen Sandstone Heavy Oil Reservoir And The Strategy Of Production With Moderate Sanding, Yiting Xie, Zhaohui Chen, Fujie Sun Jun 2014

Particles Migrating And Plugging Mechanism In Loosen Sandstone Heavy Oil Reservoir And The Strategy Of Production With Moderate Sanding, Yiting Xie, Zhaohui Chen, Fujie Sun

5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry

Fine rock particles is easy to be suspended and carried in loosen sandstone heavy oil reservoir due to the higher density and viscosity of heavy oil. The sand particles settle down, bridge and clog in pore and throat, as the result, the filtration resistance in reservoir will be redistributed. It significantly impacts on the well productivity. In this paper, the process of sand particles transporting and clogging in tunnels of rock is observed utilizing a microscopic visualization model with the unconsolidated sandpack. Furthermore, the mechanism of fine particles migration and clogging and the effects to percolation capacity of porous medium …


The Effect Of Exposure Variables On The Development Of Alumina Scales, Gerry Meier Jun 2014

The Effect Of Exposure Variables On The Development Of Alumina Scales, Gerry Meier

Thermal Barrier Coatings IV

The early development of an adherent, slowly-growing α-alumina film on the bond coat is a critical factor in the life of a thermal barrier coating system. This presentation will include results of recent experiments at the University of Pittsburgh and reanalysis of older data from the literature on the selective oxidation of aluminum from Ni-base alloys. The following aspects of alumina scale establishment will be addressed: • The manner by which alloy composition affects the kinetics and mechanism of the transition of alumina from the θ to the α polymorph. • The influence of the θ to α transition on …


Design Constraints And Higher Temperature Intermetallic Bond Coatings, T.M. Pollock, D. Jorgensen, R.W. Jackson, M. He, A. Suzuki, D. Lipkin Jun 2014

Design Constraints And Higher Temperature Intermetallic Bond Coatings, T.M. Pollock, D. Jorgensen, R.W. Jackson, M. He, A. Suzuki, D. Lipkin

Thermal Barrier Coatings IV

Bond coat interlayers in thermal barrier coating (TBC) systems must perform reliably in the complex thermal, chemical and mechanical environment of the turbine engine. To achieve higher temperatures and /or longer cyclic lives, a spectrum of intrinsic failure modes must be suppressed. Failure may occur at the bond coat – thermally grown oxide (TGO) interface, at the TGO-TBC interface or by oxidation-enhanced propagation of cracks from the coating into the substrate. Models for the failure processes suggest that bond coatings should possess improved high temperature strength (creep resistance), low oxide growth stresses and high interfacial toughnesses. Oxide growth stresses have …


Cold Spray Bond Coats Structure And Oxidation Behavior, A. Barth, S. Kudapa, W. Wong, K. Onizawa Jun 2014

Cold Spray Bond Coats Structure And Oxidation Behavior, A. Barth, S. Kudapa, W. Wong, K. Onizawa

Thermal Barrier Coatings IV

No abstract provided.


Preface, Engineering Conferences International Jun 2014

Preface, Engineering Conferences International

5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry

No abstract provided.


Program, Engineering Conferences International Jun 2014

Program, Engineering Conferences International

5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry

No abstract provided.


Program, Franco Berruti Jun 2014

Program, Franco Berruti

Thermal Barrier Coatings IV

No abstract provided.


Deep Uv-Leds Based On Group Iii-Nitride For Water Disinfection Applications, Iolanda Pio, Vittorianna Tasco, Adriana Passaseo Jun 2014

Deep Uv-Leds Based On Group Iii-Nitride For Water Disinfection Applications, Iolanda Pio, Vittorianna Tasco, Adriana Passaseo

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


On The Sustainable Management Of Sewage Sludge Disposal In Apulia, A.M. Lotito, U. Fratino, M. Blonda Jun 2014

On The Sustainable Management Of Sewage Sludge Disposal In Apulia, A.M. Lotito, U. Fratino, M. Blonda

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Wastewater Treatment And Reuse In The Oil & Petrochem Industry – A Case Study, Alberto Girardi Jun 2014

Wastewater Treatment And Reuse In The Oil & Petrochem Industry – A Case Study, Alberto Girardi

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Wastewater Reuse In Apulia: Constraints And Perspectives, Vito Colucci Jun 2014

Wastewater Reuse In Apulia: Constraints And Perspectives, Vito Colucci

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Experimental Measurement And Modeling Of Radiation Fields In Tio2 Nanoparticle Photocatalysis, Andrea Turolla, Domenico Santoro, John De Bruyn, Manuela Antonelli Jun 2014

Experimental Measurement And Modeling Of Radiation Fields In Tio2 Nanoparticle Photocatalysis, Andrea Turolla, Domenico Santoro, John De Bruyn, Manuela Antonelli

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Design Of Semiconductors-Based Composites For The Efficient Photodegradation Of Organic Micropollutants In Water, Giuseppe Mele Jun 2014

Design Of Semiconductors-Based Composites For The Efficient Photodegradation Of Organic Micropollutants In Water, Giuseppe Mele

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Back To Future: The Success Story Of Fasano’S Agricultural Wastewater Reuse Plant, Oronzo Santoro Jun 2014

Back To Future: The Success Story Of Fasano’S Agricultural Wastewater Reuse Plant, Oronzo Santoro

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Wastewater Reuse In Apulia: Between Dream And Reality, Antonio Lopez Jun 2014

Wastewater Reuse In Apulia: Between Dream And Reality, Antonio Lopez

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Sludge Production And Utilization In Italy, Giuseppe Mininni, Giulia Sagnotti Jun 2014

Sludge Production And Utilization In Italy, Giuseppe Mininni, Giulia Sagnotti

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Surface Filtration Technologies For Municipal Wastewater Reuse For Irrigation – Preliminary Results Of Demo-Scale Activities, Pompilio Vergine Jun 2014

Surface Filtration Technologies For Municipal Wastewater Reuse For Irrigation – Preliminary Results Of Demo-Scale Activities, Pompilio Vergine

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Linear Time Invariant Model Of Anaerobic Digestion Of Waste Activated Sludge, Antonios Sendjaja Jun 2014

Linear Time Invariant Model Of Anaerobic Digestion Of Waste Activated Sludge, Antonios Sendjaja

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Temperature Adjustment And Calibration Of An Asm2d-Adm1 Model, A. Fenu Jun 2014

Temperature Adjustment And Calibration Of An Asm2d-Adm1 Model, A. Fenu

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Equilibrium, Kinetic And Thermodynamic Study Of Adsorption Of Rhodamine B From Aqueous Solution By Activated Carbon From Peltophorum Pterocarpum Leaf, B. Jeyaraj, Y. Subbareddy, C. Jayakumar, K.S. Nagaraja, S. Valliammai Jun 2014

Equilibrium, Kinetic And Thermodynamic Study Of Adsorption Of Rhodamine B From Aqueous Solution By Activated Carbon From Peltophorum Pterocarpum Leaf, B. Jeyaraj, Y. Subbareddy, C. Jayakumar, K.S. Nagaraja, S. Valliammai

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Optimal Control For Activated Sludge Alternating Flow/Aeration Systems With More Than Two Basins, A. Fenu, T. Wambecq, K. De Gussem, M. Weemaes Jun 2014

Optimal Control For Activated Sludge Alternating Flow/Aeration Systems With More Than Two Basins, A. Fenu, T. Wambecq, K. De Gussem, M. Weemaes

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.


Simulation Based Feed Stream Estimation Of Wastewater Treatment Plants Using A Surrogate Model, Peter Kern Jun 2014

Simulation Based Feed Stream Estimation Of Wastewater Treatment Plants Using A Surrogate Model, Peter Kern

Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies

No abstract provided.