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Author : Li Chen Collier
Release : 1994
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Fatigue Crack Growth in Ferroelectric Ceramics Under Cycle Electric Field by : Li Chen Collier
Download or read book Fatigue Crack Growth in Ferroelectric Ceramics Under Cycle Electric Field written by Li Chen Collier. This book was released on 1994. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Doru Constantin Lupascu
Release : 2004-01-14
Genre : Science
Kind : eBook
Book Rating : 350/5 ( reviews)
Book Synopsis Fatigue in Ferroelectric Ceramics and Related Issues by : Doru Constantin Lupascu
Download or read book Fatigue in Ferroelectric Ceramics and Related Issues written by Doru Constantin Lupascu. This book was released on 2004-01-14. Available in PDF, EPUB and Kindle. Book excerpt: A major barrier to the introduction of ferroelectric devices into mass markets remains their limited reliability due to fatigue. The underlying physical and chemical mechanisms of this material fatigue phenomenon are extremely complex, and the relevant influences range from single-point defects to macroscopic boundary conditions. This book summarizes the different aspects of fatigue in ferroelectrics. It is primarily concerned with bulk material effects. Mechanical, electrical, and physico-chemical processes are described; reference data are given for different loading regimes and boundary conditions; and various fatigue models are compared. The monograph also demonstrates how the results of acoustic emission and of microscopy studies reveal the microscopic origins of fatigue in ferroelectric devices.
Author : Andrea Raphaela Engert
Release : 2013-07-17
Genre : Technology & Engineering
Kind : eBook
Book Rating : 640/5 ( reviews)
Book Synopsis Experimental studies on crack growth in ferroelectric ceramics by : Andrea Raphaela Engert
Download or read book Experimental studies on crack growth in ferroelectric ceramics written by Andrea Raphaela Engert. This book was released on 2013-07-17. Available in PDF, EPUB and Kindle. Book excerpt: This experimental work seeks to add to the understanding of fracture of ferroelectric ceramics. R-curve measurements with additional electrical loads show that AC electrical loading causes a drop in the critical mechanical load. The surface potential distribution around a stationary crack under various electromechanical loading conditions, measured with Kelvin Force Microscopy, is used to determine an effective dielectric constant of the crack, which is shown to depend on the distance from the crack tip, the electric and mechanical load and which changes with time and successive loading cycles. Experimentelle Untersuchungen zum Bruchverhalten von ferroelektrischen Keramiken. Risswiderstands-Kurven (R-Kurven) zur Untersuchung von Risswachstum bei verschiedenen kombinierten elektromechanischen Lasten zeigen, dass eine elektrische Wechsellast die kritische mechanische Last verringert. Untersuchungen des Oberflächenpotentials um ruhende durchgehende Risse mittels Kelvin Force Microscopy (KFM) und die Ableitung der effektiven Dielektrizitätskonstanten zur Beschreibung des dielektrische Verhaltens des Risses zeigen, dass letztere vom Abstand zur Rissspitze, von der elektromechanischen Last abhängt und sich mit der Zeit und mit zunehmenden Lastzyklen verändert.
Author : W. Yang
Release : 2006-06-28
Genre : Technology & Engineering
Kind : eBook
Book Rating : 314/5 ( reviews)
Book Synopsis IUTAM Symposium on Mechanics and Reliability of Actuating Materials by : W. Yang
Download or read book IUTAM Symposium on Mechanics and Reliability of Actuating Materials written by W. Yang. This book was released on 2006-06-28. Available in PDF, EPUB and Kindle. Book excerpt: Actuating materials hold a promise for fast-spreading applications in smart structures and active control systems, and have attracted extensive attention from scientists of both mechanics and materials sciences communities. High performance and stability of actuating materials and structures play a decisive role in their successive applications as sensors and actuators in structural control and robotics. The advances of actuating materials, however, recently encountered a severe reliability issue. For a better understanding toward this issue, scientific efforts are of paramount significance to gain a deep insight into the intricate deformation and failure behaviors of actuating materials. To examine the state of the art in this subject, the general assembly of IUTAM approved in August, 2002 at Cambridge University, UK, a proposal to hold an IUTAM symposium to summarize the relevant research findings. The main themes of the symposium are: (i) the constitutive relations of actuating materials that couple mechanical, electrical, thermal and magnetic properties, as well as incorporate phase transformation and domain switch; (ii) the physical mechanisms of deformation, damage, and fatigue crack growth of actuating materials; (iii) the development of failure-resilient approaches that base on the macro-, meso-, and micro-mechanics analyses; (iv) the investigation of microstructural evolution, stability of phase transformation, and size effects of ferroelectric ceramics, shape memory alloys, actuating polymers, and bio-actuating materials. The above problems represent an exciting challenge and form a research thrust of both materials science and solid mechanics. The IUTAM Symposium (GA.
Author : Winnie Wong-Ng
Release : 2012-04-11
Genre : Technology & Engineering
Kind : eBook
Book Rating : 489/5 ( reviews)
Book Synopsis Synthesis, Properties, and Crystal Chemistry of Perovskite-Based Materials by : Winnie Wong-Ng
Download or read book Synthesis, Properties, and Crystal Chemistry of Perovskite-Based Materials written by Winnie Wong-Ng. This book was released on 2012-04-11. Available in PDF, EPUB and Kindle. Book excerpt: The number of ceramic materials with a perovskite type structure islarge and of considerable technological importance due to theirrich crystal chemistry and structure-property relationships.Applications include multilayer capacitators, piezoelectrictransducers, PTC thermistors, electrooptical modulators, opticalswitches, dielectric resonators, thick film resistors, electronicsensors, electrorestrictive actuators, magnetic bubble memorydevices, laser host materials, ferromagnetic materials, refractoryelectrodes, second harmonic generators, batteries, ceramicelectrodes, thermoelectric devices, and high temperaturesuperconductors. This volume contains papers on the research and development of newperovskite materials for various applications including doping ofexisting perovskite materials as well as processing for improvedproperties.
