Download or read book Thermal Fatigue and Fracture Behavior of Ceramic Thermal Barrier Coatings written by and published by . This book was released on 2001 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Fatigue and Fracture Behavior of Ceramic Thermal Barrier Coatings written by Dongming Zhu and published by . This book was released on 2001 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Fatigue and Fracture Behavior of Ceramic Thermal Barrier Coatings Nasa written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Shock and Thermal Fatigue Behavior of Advanced Ceramics written by Gerold A. Schneider and published by Springer Science & Business Media. This book was released on 1993-06-30 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop, Schloss Ringberg/Munich, Germany, November 8-13, 1992
Download or read book Development and Fatigue Testing of Ceramic Thermal Barrier Coatings written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-21 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic thermal barrier coatings will play an increasingly important role in future gas turbine engines because of their ability to effectively protect the engine components and further raise engine temperatures. Durability of the coating systems remains a critical issue with the ever-increasing temperature requirements. Thermal conductivity increase and coating degradation due to sintering and phase changes are known to be detrimental to coating performance. There is a need to characterize the coating thermal fatigue behavior and temperature limit, in order to potentially take full advantage of the current coating capability. In this study, thermal conductivity and cyclic fatigue behaviors of plasma-sprayed ZrO2-8wt%Y2O3 thermal barrier coatings were evaluated under high temperature, large thermal gradient and thermal cycling conditions. The coating degradation and failure processes were assessed by real-time monitoring of the coating thermal conductivity under the test conditions. The ceramic coating crack initiation and propagation driving forces and failure modes under the cyclic thermal loads will be discussed in light of the high temperature mechanical fatigue and fracture testing results. Zhu, Dong-Ming and Choi, Sung R. and Miller, Robert A. Glenn Research Center NASA/TM-2004-213083, ARL-TR-3261, E-14561
Download or read book Progress in Thermal Barrier Coatings written by ACerS (American Ceramics Society, The) and published by John Wiley & Sons. This book was released on 2009-07-15 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Development and Fatigue Testing of Ceramic Thermal Barrier Coatings written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic thermal barrier coatings will play an increasingly important role in future gas turbine engines because of their ability to effectively protect the engine components and further raise engine temperatures. Durability of the coating systems remains a critical issue with the ever-increasing temperature requirements. Thermal conductivity increase and coating degradation due to sintering and phase changes are known to be detrimental to coating performance. There is a need to characterize the coating thermal fatigue behavior and temperature limit, in order to potentially take full advantage of the current coating capability. In this study, thermal conductivity and cyclic fatigue behaviors of plasma-sprayed ZrO(sub 2)-8wt%Y(sub 2)O(sub 3) thermal barrier coatings were evaluated under high temperature, large thermal gradient and thermal cycling conditions. The coating degradation and failure processes were assessed by real-time monitoring of the coating thermal conductivity under the test conditions. The ceramic coating crack initiation and propagation driving forces and failure modes under the cyclic thermal loads will be discussed in light of the high temperature mechanical fatigue and fracture testing results.
Download or read book Strength Fracture Toughness Fatigue and Standardization Issues of Free Standing Thermal Barrier Coatings written by and published by . This book was released on 2003 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strength Fracture Toughness Fatigue and Standardization Issues of Free Standing Thermal Barrier Coatings written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-11 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strength, fracture toughness and fatigue behavior of free-standing thick thermal barrier coatings of plasma-sprayed ZrO2-8wt % Y2O3 were determined at ambient and elevated temperatures in an attempt to establish a database for design. Strength, in conjunction with deformation (stress-strain behavior), was evaluated in tension (uniaxial and trans-thickness), compression, and uniaxial and biaxial flexure; fracture toughness was determined in various load conditions including mode I, mode II, and mixed modes I and II; fatigue or slow crack growth behavior was estimated in cyclic tension and dynamic flexure loading. Effect of sintering was quantified through approaches using strength, fracture toughness, and modulus (constitutive relations) measurements. Standardization issues on test methodology also was presented with a special regard to material's unique constitutive relations.Choi, Sung R. and Zhu, Dong-Ming and Miller, Robert A.Glenn Research CenterTHERMAL CONTROL COATINGS; FRACTURE STRENGTH; FATIGUE (MATERIALS); DEFORMATION; SINTERING; ZIRCONIUM OXIDES; STRESS-STRAIN RELATIONSHIPS
Download or read book Advanced Ceramic Coatings and Interfaces V written by Dongming Zhu and published by John Wiley & Sons. This book was released on 2010-11-23 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume contains sixteen contributed papers from the symposium, with topics including advanced coating processing, advanced coating for wear, corrosion, and oxidation resistance, and thermal and mechanical properties, highlighting the state-of-the-art ceramic coatings technologies for various critical engineering applications.
Download or read book Fracture and Fatigue Crack Growth Behavior of Interfaces in Thermal Barrier and Wear Resistant Coating Systems written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research on the fracture and fatigue crack-growth behavior of single crystal intermetallics was motivated by the need for improved high temperature engineering materials. The approach using a first principles total energy calculation of the energies of?001Z and?110Z surfaces in NiAl, by Yoo and Fu predicts very low fracture toughness vs. experimental findings. As the program has developed, the focus has shifted to the use of thermal barrier and wears resistant coatings to improve material behavior at high temperature and other extreme service conditions. The present emphasis therefore to develop thermal barrier and wear resistant coating systems with improved integrity and long term reliability. The major accomplishment of this work has been the development of fracture-mechanics based techniques to accurately and reproducibly measure the fracture resistance (or adhesion) of coating systems. We believe the data presented to be unique for the two coating systems characterized. Interface toughness, K, data was obtained for several specimens containing multi-layer systems of PSZ-NiAl-Pt- Superalloy and TiAlN-Cermet. The interfaces prone to fracture were identified. Experiments were also completed to analyze crack-growth under cyclic fatigue loading of these interfaces.
Download or read book Thermal Shock and Thermal Fatigue Behavior of Advanced Ceramics written by Gerold A. Schneider and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in advanced ceramics are critically evaluated in respect to their thermal shock and thermal fatigue behavior from an interdisciplinary viewpoint by leading experts. The book covers the aspects of material development, mechanical and fracture mechanical models and experimental testing methods. Special emphasis is given to the influence of a rising crack resistance on the thermal shock behavior, novel irradiation testing methods for a quantitative characterization of the thermal shock and fatigue loading as well as detailed fracture mechanical models for single and multiple crack propagation. This book summarizes developments of the last decade concerning the thermal shock and thermal fatigue behavior of advanced ceramics. The scientific articles of the book were carefully arranged in order to achieve a textbook-like form which will be of great value to researchers and students. (ABSTRACT) This book summarizes developments of the last decade concerning the thermal shock and thermal fatigue behavior of advanced ceramics. The book covers the aspects of material development, mechanical and fracture mechanical models and testing methods. The scientific articles were carefully arranged in order to achieve a textbook-like form which will be of great value to researchers and students.
Download or read book Influence of High Cycle Thermal Loads on Thermal Fatigue Behavior of Thick Thermal Barrier Coatings written by Dongming Zhu and published by . This book was released on 1997 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thick thermal barrier coating systems in a diesel engine experience severe thermal low cycle fatigue (LCF) and high cycle fatigue (HCF) during engine operation. In the present study, the mechanisms of fatigue crack initiation and propagation, as well as of coating failure, under thermal loads which simulate engine conditions, are investigated using a high power CO2 laser. In general, surface vertical cracks initiate early and grow continuously under LCF and HCF cyclic stresses. It is found that in the absence of interfacial oxidation, the failure associated with LCF is closely related to coating sintering and creep at high temperatures, which induce tensile stresses in the coating after cooling. Experiments show that the HCF cycles are very damaging to the coating systems. The combined LCF and HCF tests produced more severe coating surface cracking, microspallation and accelerated crack growth, as compared to the pure LCF test. It is suggested that the HCF component cannot only accelerate the surface crack initiation, but also interact with the LCF by contributing to the crack growth at high temperatures. The increased LCF stress intensity at the crack tip due to the HCF component enhances the subsequent LCF crack growth. Conversely, since a faster HCF crack growth rate will be expected with lower effective compressive stresses in the coating, the LCF cycles also facilitate the HCF crack growth at high temperatures by stress relaxation process. A surface wedging model has been proposed to account for the HCF crack growth in the coating system. This mechanism predicts that HCF damage effect increases with increasing temperature swing, the thermal expansion coefficient and the elastic modulus of the ceramic coating, as well as the HCF interacting depth. A good agreement has been found between the analysis and experimental evidence.
Download or read book 25th Annual Conference on Composites Advanced Ceramics Materials and Structures B Volume 22 Issue 4 written by Mrityunjay Singh and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is part of the Ceramic Engineering and Science Proceeding (CESP) series. 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.
Download or read book Advances in Ceramic Coatings and Ceramic Metal Systems written by Dongming Zhu and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer Science & Business Media. This book was released on 2010-01-11 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th International Symposium on fracture mechanics of ceramics was held in on the campus of the University of Houston, Houston, TX, USA, on February 25-28, 2003. With the natural maturing of the fields of structural ceramics, this symposium focused on nano-scale materials, composites, thin films and coatings as well as glass. The symposium also addressed new issues on fundamentals of fracture mechanics and contact mechanics, and a session on reliability and standardization.
Download or read book Advanced Ceramic Coatings and Materials for Extreme Environments II Volume 33 Issue 3 written by Dongming Zhu and published by John Wiley & Sons. This book was released on 2012-12-10 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring advanced ceramic coatings and ultra-high temperature ceramic materials, this issue brings readers up-to-date with important new and emerging findings, materials, and applications. The nineteen papers in this issue originate from two symposia and one focused session held in January 2012, during the 36th International Conference on Advanced Ceramics and Composites (ICACC). With contributions from leading ceramics and materials researchers from around the world, this issue explores the latest advances and key challenges in advanced thermal and environmental coating processing and characterizations, advanced wear corrosion-resistant, nanocomposite, and multi-functional coatings, thermal protection systems, and more.
