Download or read book High Temperature Coating Study to Reduce Contact Stress Damage of Ceramics written by J. Schienle and published by . This book was released on 1987 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Temperature Coating Study to Reduce Contact Stress Damage of Ceramics written by J. Schienle and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon nitride (Si3N4) and silicon carbide (SiC) ceramics are susceptible to contact stress damage at ceramic component interfaces in gas turbine engines. The objective of this research program was to develop adherent coating compositions and procedures that will improve contact-stress damage resistance of Si3N4 and SiC. Yttria (Y2O3) stabilized zirconia (ZrO2) coatings were applied by electron beam - physical vapor deposition (EB-PVD) to three substrate materials: reaction bonded Si3N4 (RBSN), sintered Si3N4, and sintered SiC (SSC). Several controlled substrate pretreatments (both mechanical and chemical) were used to aid in obtaining a better understanding of the mechanisms of coating adherence. Each coating/substrate system was evaluated for coating adherence before and after oxidation exposure. The coating/substrate interfaces were evaluated for microstructural characteristics. Based on the results, pretreatment and coating approaches projected to improve coating adherence were selected. Specimens were prepared to evaluate the coating adherence before and after oxidation exposure. The systems exhibiting the best coating adherence after oxidation exposure were identified. Additional speci- mens for each of these systems were prepared for analysis of the coating thermal spall resistance, friction, and contact damage resistance. The friction and contact damage resistance of uncoated RBSN, SSN, and SSC were also evaluated.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book High Temperature Coatings written by Sudhangshu Bose and published by Elsevier. This book was released on 2011-04-01 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Temperature Coatings demonstrates how to counteract the thermal effects of the rapid corrosion and degradation of exposed materials and equipment that can occur under high operating temperatures. This is the first true practical guide on the use of thermally-protective coatings for high-temperature applications, including the latest developments in materials used for protective coatings. It covers the make-up and behavior of such materials under thermal stress and the methods used for applying them to specific types of substrates, as well as invaluable advice on inspection and repair of existing thermal coatings.With his long experience in the aerospace gas turbine industry, the author has compiled the very latest in coating materials and coating technologies, as well as hard-to-find guidance on maintaining and repairing thermal coatings, including appropriate inspection protocols. The book will be supplemented with the latest reference information and additional support for finding more application-type and industry-type coatings specifications and uses, with help for the reader in finding more detailed information on a specific type of coating or a specific type of use.· Offers overview of the underlying fundamental concepts of thermally-protective coatings, including thermodynamics, energy kinetics, crystallography, and equilibrium phases· Covers essential chemistry and physics of underlying substrates, including steels, nickel-iron alloys, nickel-cobalt alloys, and titanium alloys· Provides detailed guidance on wide variety of coating types, including those used against high temperature corrosion and oxidative degradation, as well as thermal barrier coatings
Download or read book Development of Adherent Ceramic Coatings to Reduce Contact Stress Damage of Ceramics Final Report written by and published by . This book was released on 1992 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strongly adherent coatings were deposited on reaction bonded Si3N4 (RBSN), sintered SiC (SSC), and HIP'ed Si3N4 (HSN) and using a newly developed chemical vapor deposition (CVD) process. Performance of the coating was assessed by oxidation, strength and contact stress testing. A new method was developed to experimentally determine the strength and Weibull modulus of thin brittle films on ceramic substrates. A significant portion of the study was devoted to numerical modeling of the coatings in order to understand the contributions of residual stress as different coating materials and thicknesses were combined. Coating designs were further analyzed by simulating the crack growth behavior in multilayer films while accounting for the interface fracture mechanics. This work has shown that the Al20{sub 3+}ZrO2 composite coating developed in this program can provide resistance to oxidation and contact stress. Commercial application of the composite coating has been successfully demonstrated by useof the Al20{sub 3+}ZrO2 composite as a protective coating on a Si3N4 cutting tool.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Adherent Ceramic Coatings to Reduce Contact Stress Damage of Ceramics written by S. F. Wayne and published by . This book was released on 1992 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Adherent Ceramic Coatings to Reduce Contact Stress Damage of Ceramics written by Oak Ridge National Laboratory and published by . This book was released on 1992 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Adherent Ceramic Coatings to Reduce Contact Stress Damage of Ceramics written by and published by . This book was released on 1992 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strongly adherent coatings were deposited on reaction bonded Si[sub 3]N[sub 4] (RBSN), sintered SiC (SSC), and HIP'ed Si[sub 3]N[sub 4] (HSN) and using a newly developed chemical vapor deposition (CVD) process. Performance of the coating was assessed by oxidation, strength and contact stress testing. A new method was developed to experimentally determine the strength and Weibull modulus of thin brittle films on ceramic substrates. A significant portion of the study was devoted to numerical modeling of the coatings in order to understand the contributions of residual stress as different coating materials and thicknesses were combined. Coating designs were further analyzed by simulating the crack growth behavior in multilayer films while accounting for the interface fracture mechanics. This work has shown that the Al[sub 2]0[sub 3+]ZrO[sub 2] composite coating developed in this program can provide resistance to oxidation and contact stress. Commercial application of the composite coating has been successfully demonstrated by useof the Al[sub 2]0[sub 3+]ZrO[sub 2] composite as a protective coating on a Si[sub 3]N[sub 4] cutting tool.
Download or read book Friction and Wear of Ceramics written by Bikramjit Basu and published by John Wiley & Sons. This book was released on 2020-06-23 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the area of tribology broadly, providing important introductory chapters to fundamentals, processing, and applications of tribology. The book is designed primarily for easy and cohesive understanding for students and practicing scientists pursuing the area of tribology with focus on materials. This book helps students and practicing scientists alike understand that a comprehensive knowledge about the friction and wear properties of advanced materials is essential to further design and development of new materials. The description of the wear micromechanisms of various materials will provide a strong background to the readers as how to design and develop new tribological materials. This book also places importance on the development of new ceramic composites in the context of tribological applications. Some of the key features of the book include: Fundamentals section highlights the salient issues of ceramic processing and mechanical properties of important oxide and non-oxide ceramic systems; State of the art research findings on important ceramic composites are included and an understanding on the behavior of silicon carbide (SiC) based ceramic composites in dry sliding wear conditions is presented as a case study; Erosion wear behavior of ceramics, in which case studies on high temperature erosion behavior of SiC based composites and zirconium diboride (ZrB2) based composites is also covered; Wear behavior of ceramic coatings is rarely discussed in any tribology related books therefore a case study explaining the abrasion wear behavior of WC-Co coating is provided. Finally an appendix chapter is included in which a collection of several types of questions including multiple choice, short answer and long answer are provided.
Download or read book ASME Proceedings of the 1988 National Heat Transfer Conference HTD 96 written by and published by . This book was released on 1988 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Industry University Advanced Materials Conference written by Jerome G. Morse and published by . This book was released on 1987 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elevated Temperature Coatings written by Narendra B. Dahotre and published by Minerals, Metals, & Materials Society. This book was released on 1996 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the processing and characterization of high temperature coatings with regard to engineering, physical, and chemical properties. Included are discussions regarding the synthesis of new and unconventional coating materials, various existing methods along with novel techniques for producing coatings, and the removal of coatings in compliance with environmental requirements.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report to Congress on the Automotive Technology Development Program Eleventh written by and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical News Bulletin written by and published by . This book was released on 1957 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
