Thermal Barrier Coating Life Prediction Model Development

Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
Page : 160 pages
File Size : 47,7 Mb
Release : 2018-11-18
Category : Science
ISBN : 1731489056

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Thermal Barrier Coating Life Prediction Model Development by National Aeronautics and Space Adm Nasa Pdf

This report describes work performed to determine the predominat modes of degradation of a plasma sprayed thermal barrier coating system and to develop and verify life prediction models accounting for these degradation modes. The primary TBC system consisted of a low pressure plasma sprayed NiCrAlY bond coat, an air plasma sprayed ZrO2-Y2O3 top coat, and a Rene' 80 substrate. The work was divided into 3 technical tasks. The primary failure mode to be addressed was loss of the zirconia layer through spalling. Experiments showed that oxidation of the bond coat is a significant contributor to coating failure. It was evident from the test results that the species of oxide scale initially formed on the bond coat plays a role in coating degradation and failure. It was also shown that elevated temperature creep of the bond coat plays a role in coating failure. An empirical model was developed for predicting the test life of specimens with selected coating, specimen, and test condition variations. In the second task, a coating life prediction model was developed based on the data from Task 1 experiments, results from thermomechanical experiments performed as part of Task 2, and finite element analyses of the TBC system during thermal cycles. The third and final task attempted to verify the validity of the model developed in Task 2. This was done by using the model to predict the test lives of several coating variations and specimen geometries, then comparing these predicted lives to experimentally determined test lives. It was found that the model correctly predicts trends, but that additional refinement is needed to accurately predict coating life. Hillery, R. V. and Pilsner, B. H. and Mcknight, R. L. and Cook, T. S. and Hartle, M. S. LIFE (DURABILITY); PREDICTIONS; THERMAL CONTROL COATINGS; ALUMINUM; CHROMIUM; DEGRADATION; FAILURE MODES; NICKEL; PLASMA SPRAYING; SUBSTRATES; YTTRIUM; ZIRCONIUM...

Author : Anonim
Publisher : Unknown
Page : 840 pages
File Size : 48,6 Mb
Release : 1990
Category : Power resources
ISBN : MSU:31293010869141

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Energy Research Abstracts by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 848 pages
File Size : 41,6 Mb
Release : 1989
Category : Power resources
ISBN : UIUC:30112018073699

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ERDA Energy Research Abstracts by Anonim Pdf

Author : Mohit Gupta
Publisher : Springer
Page : 82 pages
File Size : 54,7 Mb
Release : 2015-05-05
Category : Technology & Engineering
ISBN : 9783319172545

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Design of Thermal Barrier Coatings by Mohit Gupta Pdf

This book details the relationships between microstructure, interface roughness, and properties of thermal barrier coatings. The author proposes a method for the reduction of the thermal conductivity of the ceramic layer in order to increase the lifetime of thermal barrier coatings. He includes models for the optimization of ceramic layer microstructure and interface roughness.

Author : Anonim
Publisher : Unknown
Page : 294 pages
File Size : 49,7 Mb
Release : 1995
Category : Electronic
ISBN : NASA:31769000471451

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Thermal Barrier Coating Workshop by Anonim Pdf

Author : ACerS (American Ceramics Society, The)
Publisher : John Wiley & Sons
Page : 642 pages
File Size : 44,7 Mb
Release : 2009-06-15
Category : Technology & Engineering
ISBN : 9780470408384

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Progress in Thermal Barrier Coatings by ACerS (American Ceramics Society, The) Pdf

This edition of the Progress in Ceramic Technology series compiles articles published on thermal barrier coatings (TBCs) by The American Ceramic Society (ACerS). It collects in one resource the current research papers on materials-related aspects of thermal barrier coatings and associated technologies. Logically organized and carefully selected, the papers in this edition divide into six categories: Applications Material Improvements and Novel Compositions Developments in Processing Mechanical Properties Thermal Properties Citations follow each title in the table of contents, making this a key resource for professionals and academia.

Author : Anonim
Publisher : Unknown
Page : 244 pages
File Size : 53,6 Mb
Release : 1990
Category : Aeronautics
ISBN : MINN:30000001538218

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Scientific and Technical Aerospace Reports by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 48 pages
File Size : 47,5 Mb
Release : 1997
Category : Electronic
ISBN : NASA:31769000627094

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Determination of Creep Behavior of Thermal Barrier Coatings Under Laser Imposed Temperature and Stress Gradients by Anonim Pdf

In the present study, a laser sintering/creep technique has been established to quantitatively determine the creep behavior of thermal barrier coatings under steady state high heat flux/high thermal gradient conditions. An approach is proposed to separate the strong influence of stress relaxation, based on the deduced strain rate changes with respect to time and temperature during testing. For a plasma sprayed zirconia-8wt.% yttria ceramic coating, a large primary creep strain and a low creep activation energy were observed. The significant primary creep stage and low apparent creep activation energy for the coating are attributed to stress induced mechanical sliding, and temperature and stress enhanced cation diffusion through the splat and grain boundaries. Possible creep mechanisms for the ceramic coating are also discussed. The elastic modulus evolution, the stress response and the total accumulated creep strain variation across the ceramic coating under laser imposed temperature and stress conditions are simulated using a finite difference approach. The modeled creep response is consistent with experimental observations.

Author : Hua-Tay Lin,Dongming Zhu
Publisher : John Wiley & Sons
Page : 169 pages
File Size : 53,9 Mb
Release : 2009-02-11
Category : Technology & Engineering
ISBN : 0470456310

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Advanced Ceramic Coatings and Interfaces III by Hua-Tay Lin,Dongming Zhu Pdf

This volume provides a one-stop resource, compiling current research on ceramic coatings and interfaces. It is a collection of papers from The American Ceramic Society s 32nd International Conference on Advanced Ceramics and Composites, January 27-February 1, 2008. Papers include developments and advances in ceramic coatings for structural, environmental, and functional applications. Articles are logically organized to provide insight into various aspects of ceramic coatings and interfaces. This is a valuable, up-to-date resource for researchers in industry, government, or academia who work in ceramics engineering.

Author : Yichun Zhou,Li Yang,Wang Zhu
Publisher : Springer Nature
Page : 943 pages
File Size : 40,9 Mb
Release : 2022-10-08
Category : Science
ISBN : 9789811927232

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Thermal Barrier Coatings: Failure Theory and Evaluation Technology by Yichun Zhou,Li Yang,Wang Zhu Pdf

This book highlights the failure theories and evaluation techniques of thermal barrier coatings, covering the thermal-mechanical–chemical coupling theories, performance and damage characterization techniques, and related evaluations. Thermal barrier coatings are the key thermal protection materials for high-temperature components in advanced aeroengines. Coating spallation is a major technical bottleneck faced by researchers. The extremely complex microstructure, diverse service environments, and failure behaviors bring challenges to the spallation analysis in terms of the selective use of mechanical theories, experimental methods, and testing platforms. In the book, the authors provide a systematic summary of the latest research and technological advances and present their insights and findings in the past couple of decades. This book is not only suitable for researchers and engineers in thermal barrier coatings and related fields but also a good reference for upper-undergraduate and postgraduate students of materials science and mechanics majors.

Author : National Research Council,Division on Engineering and Physical Sciences,National Materials Advisory Board,Commission on Engineering and Technical Systems,Committee on Coatings for High-Temperature Structural Materials
Publisher : National Academies Press
Page : 102 pages
File Size : 43,5 Mb
Release : 1996-05-13
Category : Technology & Engineering
ISBN : 9780309176026

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Coatings for High-Temperature Structural Materials by National Research Council,Division on Engineering and Physical Sciences,National Materials Advisory Board,Commission on Engineering and Technical Systems,Committee on Coatings for High-Temperature Structural Materials Pdf

This book assesses the state of the art of coatings materials and processes for gas-turbine blades and vanes, determines potential applications of coatings in high-temperature environments, identifies needs for improved coatings in terms of performance enhancements, design considerations, and fabrication processes, assesses durability of advanced coating systems in expected service environments, and discusses the required inspection, repair, and maintenance methods. The promising areas for research and development of materials and processes for improved coating systems and the approaches to increased coating standardization are identified, with an emphasis on materials and processes with the potential for improved performance, quality, reproducibility, or manufacturing cost reduction.

Author : Uwe Schulz,Hua-Tay Lin
Publisher : John Wiley & Sons
Page : 268 pages
File Size : 52,6 Mb
Release : 2007-11-16
Category : Technology & Engineering
ISBN : 9780470196342

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Advanced Ceramic Coatings and Interfaces II, Volume 28, Issue 3 by Uwe Schulz,Hua-Tay Lin Pdf

Papers from The American Ceramic Society's 31st International Conference on Advanced Ceramics and Composites, held in Daytona Beach, Florida, January 21-26, 2007. Focuses on recent advances in coating development, processing, structural design, microstructure and property characterization, and life prediction.

Author : Anonim
Publisher : Unknown
Page : 136 pages
File Size : 48,7 Mb
Release : 1989
Category : Aeronautics
ISBN : MINN:31951P00161750O

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NASA Technical Memorandum by Anonim Pdf

Author : Dongming Zhu,Kevin Plucknett
Publisher : John Wiley & Sons
Page : 300 pages
File Size : 50,6 Mb
Release : 2009-09-28
Category : Technology & Engineering
ISBN : 9780470291627

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Advances in Ceramic Coatings and Ceramic-Metal Systems by Dongming Zhu,Kevin Plucknett Pdf

This volume includes 46 contributed articles from the Advanced Ceramic Coatings for Structural, Environmental and Functional Applications and the International Symposium on Advances in Ceramic-Metal Systems symposia. Topics include processing and microstructure design, mechanical and thermal properties, advanced testing and non-destructive evaluation, wear, erosion and corrosion behavior, functional properties and modeling. A significant portion of the contributed articles focus on current state-of-the-art industrial applications of ceramic coatings and ceramic-metal composites.

Author : Waltraud M. Kriven,Jingyang Wang,Dongming Zhu,Thomas Fischer
Publisher : John Wiley & Sons
Page : 350 pages
File Size : 55,5 Mb
Release : 2016-01-05
Category : Technology & Engineering
ISBN : 9781119211730

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Developments in Strategic Ceramic Materials by Waltraud M. Kriven,Jingyang Wang,Dongming Zhu,Thomas Fischer Pdf

The Ceramic Engineering and Science Proceeding has been published by The American Ceramic Society since 1980. This series contains a collection of papers dealing with issues in both traditional ceramics (i.e., glass, whitewares, refractories, and porcelain enamel) and advanced ceramics. Topics covered in the area of advanced ceramic include bioceramics, nanomaterials, composites, solid oxide fuel cells, mechanical properties and structural design, advanced ceramic coatings, ceramic armor, porous ceramics, and more.