Relevant bibliographies by topics / Fracture mechanics of ceramics / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Fracture mechanics of ceramics.

Dissertations / Theses on the topic 'Fracture mechanics of ceramics'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Fracture mechanics of ceramics.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Liu, Guoning. "Application of fracture mechanics in electrical/mechanical failures of dielectrics /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MECH%202006%20LIU.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Matthews, Stephen John. "Cavitation erosion of aluminium alloys, aluminium alloy/ceramic composites and ceramics." Thesis, Coventry University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317927.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mashal, Yosry A. "A fracture mechanics approach to the wear of ceramics and glass." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295606.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Tianhong. "Fracture mechanics studies of failures of lead zirconate titanate ceramics under mechanical and/or electrical loadings /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?MECH%202003%20WANG.

Full text
Abstract:
Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.
Includes bibliographical references (leaves 132-137). Also available in electronic version. Access restricted to campus users.
APA, Harvard, Vancouver, ISO, and other styles
5

Yang, Kwan-Ho. "Development of impact testing procedure at elevated temperature /." Thesis, Connect to this title online; UW restricted, 1988. http://hdl.handle.net/1773/7038.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Z. P. "Analysis and palliation of contact stresses between ceramics and metals." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.352926.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Chung, Jae Hoon. "Compressive mechanical behavior of hollow ceramic spheres and bonded-sphere forms." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/9984.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Knight, P. A. "Nucleation and development of radiation damage in ceramics." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258166.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Balakrishnan, Suresh. "High temperature corrosion of certain nitrogen based ceramics." Thesis, Northumbria University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245259.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Dower, Liam Timothy. "Corrosion of sialon ceramics by molten aluminium and copper." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366745.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Lee, Kwok-lun, and 李國綸. "Deformation and fracture analysis of piezoelectric materials using theoretical, experimental and numerical techniques." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31244385.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Mesmar, Samer. "Comparison of adherence of self-cured adhesive resin cement to lithium disilicate ceramics and ceramic resin composites using fracture mechanics." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/51974.

Full text
Abstract:
Objective : The goal of this study was to apply fracture mechanics methodology to assess the effect of surface preconditioning on the short and long term adherence between a widely used adhesive resin cement (RelyX Ultimate, 3M ESPE) and recently introduced CAD/CAM materials : two ceramic resin composites (Lava Ultimate – 3M ESPE and Enamic – Vita-Zahnfabrik) and a ceramic (IPS e.max – Ivoclar-Vivadent). Materials and Methods : Sixty specimens were prepared from each e.max and Enamic, and 120 specimens were prepared for Lava Ultimate. Ceramic resin composite blocks samples were prepared by wet cutting and grinding. Ceramic samples were prepared using the lost wax procedure and pressing. Enamic and e.max bonding surfaces were treated with hydrofluoric acid. Lava Ultimate received two surface treatments : sandblasting and Rocatec soft. All samples were bonded using an adhesive and resin cement and stored in water at 37°C. After 24h storage, half of the specimens from each group were tested to determine the interfacial KIC using an Instron universal testing machine; the remaining specimens were tested after 60d storage. Scanning electron microscopy fractographic analysis was performed on representative fractured samples from each group to determine the mode of failure. To determine the adhesive resin cement KIC, twenty specimens were prepared using a mold. Half of the specimens were tested after 24h storage in water at 37°C and the other half were tested after 60d storage. The KIC results were analyzed using two-way ANOVA followed by Scheffé multiple means comparisons. Results : Lava Ultimate had a significantly higher interfacial KIC at 24h when compared to Enamic and e.max. For Lava Ultimate, crack propagation occurred cohesively through the adhesive resin cement. In Enamic and e.max samples, crack propagation occurred cohesively within the adhesive layer. Only Enamic showed a significantly higher interfacial KIC at 60d, compared to the other groups. Lava Ultimate and e.max interfacial KIC, and cement KIC showed lower values at 60d. Conclusion : For Lava Ultimate, surface silicatisation seems to be a more effective surface treatment compared to only sandblasting. For Enamic and e.max, the application of silane coupling agent and adhesive contained in one solution does not seem to be effective.
Dentistry, Faculty of
Graduate
APA, Harvard, Vancouver, ISO, and other styles
13

Cook, Simon G. "Environment assisted crack growth in ceramics for domestic boiler heat exchangers." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320047.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Matharu, Channan Singh. "Friction and wear of engineering ceramics under sliding conditions at elevated temperatures." Thesis, Brunel University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328848.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Zhang, Li Ying Grace. "Fatigue and integrity of hard ceramics and coatings using the soft impressor technique." Thesis, University of Hull, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363272.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Britt, James Marcel. "Fracture mechanisms of an alumina ceramic at elevated temperatures." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/9329.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Miyazaki, Natsumi. "Influence of Porosity and Pore-Distributions on Strength Properties of Porous Ceramics." Kyoto University, 2019. http://hdl.handle.net/2433/244569.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Geromel, fischer Arthur. "Variational approach to dynamic fracture and applications to the fragmentation of metals and ceramics." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX096/document.

Full text
Abstract:
Le principal objectif de ce travail est l'étude de la fragmentation d'enveloppes métalliques. Cette thèse est divisée en quatre parties : la construction d'un modèle d'endommagement, l'implémentation numérique, la calibration des paramètres du modèle en utilisant des données expérimentales, et des travaux analytiques.Tout d'abord, nous avons considéré des modèles qui couplent les modèles d'endommagement classiques avec la plasticité et la dynamique. En utilisant l'énergie et l'action du système, nous avons obtenu toutes les équations qui décrivent le modèle dynamique et ductile : l'équation de la dynamique, le critère de plasticité et le critère d'endommagement. Nous avons ensuite détaillé l'implémentation numérique de ces modèles.Des résultats qualitatifs ont ensuite pu être obtenus, comme le nombre et la direction des fissures, ainsi que la convergence vers le modèle quasi-statique.Afin de mieux comprendre l'influence de chaque paramètre du modèle, nous avons étudié analytiquement le problème. A partir de l'observation de l'amplitude des perturbations, nous avons pu décrire comment obtenir une approximation analytique du nombre de fissures dans le cas d'un anneau en expansion.Cependant, pour être capable de simuler des problèmes réalistes, il est nécessaire de calibrer les paramètres du modèle. Nous nous sommes intéressés plus particulièrement au cas des matériaux fragiles. Les données expérimentales ont été obtenues par une série d'expériences réalisée par le CEA.Afin d'empêcher la localisation de la déformation plastique dans des bandes d'épaisseur nulle, d'autres formes de régularisation ont été étudiées, comme par exemple, l'utilisation des propriétés dissipatives du champ de température.Enfin, nous avons conclu ce travail en proposant des modèles de plasticité où l'énergie dépend aussi du gradient de la déformation plastique (modèles de plasticité à gradient)
The main objective of this work was the study of the fragmentation of a metallic shell. This thesis is divided into four parts: construction of a damage model, numerical implementation, calibration of the model parameters using experimental data and analytical works.In this work, we considered a model that couples the standard gradient damage models with plasticity and dynamics. Using the energy and the action of the system, we could obtain all the equations necessary to describe the dynamic ductile model: the equations of dynamics, the plasticity criterion and the damage criterion. We then detail the numerical implementation of these models.Some qualitative behaviours are then obtained, such as the number and the direction of cracks, and the convergence to the quasi-static model.In order to better understand the influence of the parameters, we studied the problem analytically. By studying the amplitude of the perturbations, we describe how to obtain an analytic approximation for the number of cracks in a ring under expansion.In order to run realistic simulations, it is needed to calibrate the material parameters. We focus here on a simple case of brittle materials. The experimental data were obtained in a series of shockless spalling tests performed by the CEA.We also study other forms of regularization, now applied to the plastic strain, avoiding localization in zero-thickness bands.We considered using the dissipative properties of the temperature field to regularize the model. Finally, we conclude with plasticity models where we add a term depending on the gradient of the plastic strain (gradient plasticity models)
APA, Harvard, Vancouver, ISO, and other styles
19

Karastamatis, Thomas. "Measuring the R-curves of lead zirconate titanate (PZT) from a surface crack in flexure (SCF)." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16713.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Long-Hwu, Keh. "Fracture studies of metal/ceramic laminates." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390495.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Okada, Hiroshi. "Boundary element methods for linear and nonlinear solid mechanics problems : and fracture toughness enhancement mechanisms in ceramic materials." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/19169.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Janakiraman, Narayanan. "Deformation and fracture mechanical properties of precursor derived Si-C-N ceramics." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-29936.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Guillou, Marie-Odile. "Indentation deformation and fracture of hard ceramic materials." Thesis, University of Exeter, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317433.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Lyons, Jed S. "Micromechanical studies of crack growth in ceramic matrix composite." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/16086.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

田中, 啓介, Keisuke TANAKA, 義明 秋庭, Yoshiaki AKINIWA, 泰樹 北, Yasuki KITA, 永次 佐藤, and Eiji SATO. "多孔質セラミックスの切欠き破壊強度のR曲線法による評価." 日本機械学会, 2003. http://hdl.handle.net/2237/9143.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Tuersley, Ian P. "The microstructure and fracture mechanisms of silicon nitride based ceramics for gas turbine applications." Thesis, University of Warwick, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533208.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Twigg, Peter Charles. "Mechanical degradation of ceramic coatings and surfaces." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362549.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Janakiraman, Narayanan [Verfasser]. "Deformation and fracture mechanical properties of precursor-derived Si-C-N ceramics / vorgelegt von Narayanan Janakiraman." Stuttgart : Max-Planck-Inst. für Metallforschung, 2007. http://d-nb.info/995372101/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Davies, C. M. A. "Failure mechanisms in glass-ceramic matrix composite laminates." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387305.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Budd, Michael Ian. "Mechanical property - fracture behaviour - microstructure relationships in particulate reinforced MgO#centre dot#SiO←2 based glass-ceramic matrix composites." Thesis, University of Bath, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260277.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Kong, Hosung. "Friction and wear at sliding ceramic surfaces." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386230.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Saewong, Pakamard. "Erosion of glass and glass-ceramic matrix composites." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300838.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Barrett, Raymond. "Structure and properties of silicon carbide reinforced alumina ceramic composites." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385903.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Goat, Christopher. "Erosion resistance in metal - ceramic multilayer coatings for gas turbine compressor applications." Thesis, Cranfield University, 1995. http://dspace.lib.cranfield.ac.uk/handle/1826/10717.

Full text
Abstract:
The erosion resistance of 50 m metal-ceramic multilayer coatings has been investigated under impact conditions comparable to those in a gas turbine compressor cascade. lt was possible to improve upon the erosion resistance of Ti-6Al-4V by a significant margin. The influence of layer mechanical properties, layer thickness, ceramic content and coating process on erosion resistance has been studied over a range of impact conditions. The most suitable coating formulation for maximum erosion resistance changed with particle impact energy. Under low energy impact conditions (<55 joules) coatings with a high ceramic content demonstrated the highest erosion resistance. As particle impact energy increased, coatings with a high ceramic content perfonned poorly, and those containing a high volume fraction (50%) ductile metal layer, with thin metal and ceramic layers become more successful. Three principal damage types were observed: lateral fracture, tensile fracture and plastic definition. The most severe coating losses resulted from spallation due to lateral fracture. Coatings containing a high proportion of ductile metal with thin metal and ceramic layers were successful because such coatings had a high resistance to lateral fracture. Erosion resistance was greatest when the metal layer had a high yield strength and elastic modulus; such a combination of properties also resisted plastic definition. Scratch testing was investigated as a simple alterative technique for assessing coating erosion resistance. Repeated pass scratch testing generated similar damage modes to those of particle impact, but there was poor correlation between coating erosion rate and the threshold load for scratch damage.
APA, Harvard, Vancouver, ISO, and other styles
35

Pryce, A. W. "Matrix cracking and stress/strain behaviour of continuous fibre ceramic composite laminates." Thesis, University of Surrey, 1991. http://epubs.surrey.ac.uk/843150/.

Full text
Abstract:
Matrix damage and its effects on mechanical properties have been examined for SiC (Nicalon1) fibre reinforced glass and glass ceramic matrix composites under quasi-static and fatigue loading conditions. Nicalon/Pyrex laminates of different lay-ups have been tested under quasi-static tension. The elastic moduli have been measured and matrix damage monitored as a function of applied strain. The mechanical properties are strongly influenced by the presence of crystalline regions in the matrix which promote microcracking. Laminated plate theory is used to provide bounds to the moduli of the laminates. For unidirectional and simple crossply Nicalon/CAS2 laminates the quasi-static stress/strain behaviour and associated matrix damage accumulation have been examined in detail. The damage development with applied stress was quantified by counts of crack density (in both longitudinal and transverse plies), stiffness loss and cumulative residual strain. The quasi static stress/strain behaviour during continuous tests (accumulating damage) and discontinuous tests (constant damage) have been modelled using a stress analysis based on Aveston, Cooper and Kelly (ACK) theory. The continuous stress/strain behaviour of (0/90) crossply laminates has been modelled using a shear-lag analysis developed previously to describe the transverse ply cracking behaviour of polymer matrix composites. The analysis is modified to account for longitudinal ply cracking. Matrix damage development in unidirectional and (0/90) crossply laminates under quasistatic cycling and high frequency fatigue loading have been studied. For unidirectional laminates stable stress/strain hysteresis loops were obtained during quasi-static cycling, corresponding to stable matrix damage states. These and similar loops obtained after high frequency fatigue are modelled using, the discontinuous stress/strain analysis. It is suggested that the effect of high frequency fatigue is to decrease the interfacial shear strength.
APA, Harvard, Vancouver, ISO, and other styles
36

Stumpf, Aisha de Souza Gomes. "Comportamento mecânico de cerâmicas à base de alumina e de alumina-feldspato em meio de ácido acético (4%)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/32006.

Full text
Abstract:
O objetivo deste estudo foi analisar as propriedades mecânicas de cerâmicas à base de alumina e alumina-feldspato quando expostas a um meio agressivo (ácido acético 4%). Os corpos cerâmicos de alumina, contendo diferentes quantidades de feldspato (0, 1, 5, 10, 40 ou 100%), foram sinterizados a 1160, 1300, 1600 ou 1700ºC. Os espécimes foram divididos em três grupos de acordo com o tamanho do entalhe infligido (0, 30 ou 50% da largura do corpo-de-prova). Metade dos corpos cerâmicos foi exposta a uma solução de ácido acético a 4%. Os corpos cerâmicos sem e após ataque foram submetidos a ensaios para a determinação da resistência mecânica e do KIC; (por flexão a 4-pontos), área superficial (BET) e porosidade (método de Arquimedes). A microestrutura foi investigada por microscopia óptica e eletrônica de varredura, incluindo mapeamento por EDS, para a determinação da presença e distribuição de elementos químicos de interesse (C, O, Al, Si, K, Na, Mg). A solução lixiviada pelo ataque por ácido acético foi analisa para a determinação da concentração dos íons (Na+, Al+3, Si+4 e K+). Os resultados mostraram que os corpos cerâmicos sinterizados a 1700ºC, quando expostos ao ácido acético, diminuem sua resistência mecânica. Para os corpos cerâmicos sinterizados a 1600ºC a resistência mecânica não foi alterada. Nessas amostras, o KIC até aumentou após a exposição ao ácido acético. O ataque por ácido acético causou aumento na área superficial específica e do volume total de poros, o que foi confirmado pela concentração de íons na solução lixiviada pelo ataque por ácido acético. A fase vítrea, mesmo em pequenas quantidades, auxilia os corpos cerâmicos à base de alumina-feldspato a adquirir as propriedades mecânicas similares, ou até melhores, do que os corpos cerâmicos de alumina, dependendo da temperatura de sinterização. Isso sugere que é possível aperfeiçoar a formulação e a temperatura de queima de cerâmicas baseado na introdução de fase vítrea na microestrutura dos materiais, a fim de enfrentarem o rigor do ambiente oral.
This study investigates the mechanical properties of alumina-feldspar based ceramics when exposed to an aggressive environment (acetic acid 4%). Alumina ceramics containing different concentrations of feldspar (0, 1, 5, 10, 40 or 100%) were sintered at one of the temperatures 1160, 1300, 1600, or 1700oC. The samples were divided according to the inflicted flaws (of height 0, 30, or 50%). Half of these ceramic bodies were exposed to 4% acetic acid. The ceramic bodies whether or not exposed to acetic acid were tested in order to determine mechanical resistance and KIC (4 point bending test), superficial area (BET) and porosity (Archimedes). The microstructure was analyzed by optical and scanning microscopy, including element mapping performed by EDS to determine the presence and distribution of specific chemical elements (C, O, Al, Si, K, Na, Mg). The leachate solution was evaluated to determine the concentration of ions (Na+, Al+3, Si+4 e K+). The results showed that the ceramic bodies sintered at 1700oC decrease their mechanical resistance when exposed to acetic acid. The mechanical resistance for ceramic bodies sintered at 1600ºC was not altered. In these samples, the KIC even increased after acetic acid exposure. The acetic acid attack increased specific superficial area and total pore volume, which was confirmed by the ion concentration on the leachate solution. The glassy phase, even in small amounts, aids the alumina-feldspar based ceramics in acquiring similar or even better mechanical properties than alumina ceramic bodies, depending of sintering temperature. This suggests that is possible to enhance both formulation and sintering temperature of ceramics based on the introduction of glassy phase into the microstructure in order to face the rigors of the oral environment.
APA, Harvard, Vancouver, ISO, and other styles
37

Graham, Samuel Jr. "Effective thermal condutivity of damaged composites." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16935.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Kosorín, Michal. "Výpočtové modelování porušení keramických částicových kompozitních materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418188.

Full text
Abstract:
Subcritical crack growth in composite materials plays quite an important role in determination of the service life and leads to the defects growth below the fracture toughness. The thesis presents search of the several scientific works dealing with the determination of the crack growth direction in composite materials. The aim of this diploma thesis was to create 2D and 3D finite element models to analyse crack growth in Low Temperature Co-fired Ceramics (LTCC). These models were compared based on the time calculation of the crack propagation under the subcritical growth conditions.
APA, Harvard, Vancouver, ISO, and other styles
39

Lukich, Svetlana. "VIBRATIONAL AND MECHANICAL PROPERTIES OF 10 MOL % SC2O3-1 MOL % CEO2- ZRO2 ELECTROLYTE CERAMICS FOR SOLID OXIDE FUEL CELLS." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4001.

Full text
Abstract:
Solid Oxide Fuel Cells (SOFCs) are emerging as a potential breakthrough energy conversion technology for clean and efficient production of electricity and heat from hydrogen and hydro-carbon fuels. Sc₀.₁Ce₀.₀₁ZrO₂ electrolytes for Solid Oxide Fuel Cells are very promising materials because their high ionic conductivity in the intermediate temperature range 700°C-800°C. The vibration response of cubic and rhombohedral ([beta]) 10 mol%Sc₂O₃ - 1 mol%CeO₂ - ZrO₂ (Sc₀.₁Ce₀.₀₁ZrO₂) both at room and high-temperatures is reported. The in-situ heating experiments and ex-situ indentation experiments were performed to characterize the vibrational behavior of these important materials. A temperature and stress-assisted phase transition from cubic to rhombohedral phase was detected during in-situ Raman spectroscopy experiments. While heating and indentation experiments performed separately did not cause the transition of the cubic phase into the rhombohedral structure under the performed experimental conditions and only broadened or strained peaks of the cubic phase could be detected, the heating of the indented (strained) surface leaded to the formation of the rhombohedral Sc₀.₁Ce₀.₀₁ZrO₂. Both temperature range and strained zone were estimated by in situ heating and 2D mapping, where a formation of rhombohedral or retention of cubic phase has been promoted. The mechanical properties, such as Young’s modulus, Vickers hardness, indentation fracture resistance, room and high temperature four point bending strength and SEVNB fracture toughness along with the stress--strain deformation behavior in compression, of 10 mol% Sc₂O₃--1 mol % CeO₂ - ZrO₂ (ScCeZrO₂) ceramics have been studied. The chosen composition of the ScCeZrO₂ has very high ionic conductivity and, therefore, is very promising oxygen ion conducting electrolyte for the intermediate temperature Solid Oxide Fuel Cells. Therefore, its mechanical behavior is of importance and is presented in this study.
M.S.M.S.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Materials Science & Engr MSMSE
APA, Harvard, Vancouver, ISO, and other styles
40

Plappally, Anand Krishnan. "Theoretical and Empirical Modeling of Flow, Strength, Leaching and Micro-Structural Characteristics of V Shaped Porous Ceramic Water Filters." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276860054.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Svoboda, Josef. "Numerická simulace růstu trhliny v keramických kompozitních materiálech ve 3D." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318715.

Full text
Abstract:
The strength of materials such as glass and ceramics can be influenced by the environment (stress corrosion). Under applied stress defects (cracks) can grow sub-critically below fracture toughness K_Ic. The aim of this work was to develop a three-dimensional finite-element model to analyze the subcritical crack growth behavior of ceramic-based particulate composites. The maximum tangential stress criterion (MTS) was used to predict the direction of the crack propagation in the framework of linear elastic fracture mechanics. The modeled material was a Low Temperature Co-fired Ceramics (LTCC), containing alumina particles embedded in a glass matrix. The main aim of this work was to develop a 3D model describing the crack growth. Conclusions from this work can contribute to a better understanding of subcritical crack propagation in particle composites.
APA, Harvard, Vancouver, ISO, and other styles
42

Masini, Alessia. "The Role of Bi/Material Interface in Integrity of Layered Metal/Ceramic." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399207.

Full text
Abstract:
The present doctoral thesis summarises results of investigation focused on the characterisation of materials involved in Solid Oxide Cell technology. The main topic of investigation was the ceramic cell, also known as MEA. Particular attention was given to the role that bi-material interfaces, co-sintering effects and residual stresses play in the resulting mechanical response. The first main goal was to investigate the effects of the manufacturing process (i.e. layer by layer deposition) on the mechanical response; to enable this investigation, electrode layers were screen-printed one by one on the electrolyte support and experimental tests were performed after every layer deposition. The experimental activity started with the measurement of the elastic characteristics. Both elastic and shear moduli were measured via three different techniques at room and high temperature. Then, uniaxial and biaxial flexural strengths were determined via two loading configurations. The analysis of the elastic and fracture behaviours of the MEA revealed that the addition of layers to the electrolyte has a detrimental effect on the final mechanical response. Elastic characteristics and flexural strength of the electrolyte on the MEA level are sensibly reduced. The reasons behind the weakening effect can be ascribed to the presence and redistribution of residual stresses, changes in the crack initiation site, porosity of layers and pre-cracks formation in the electrode layers. Finally, the coefficients of thermal expansion were evaluated via dilatometry on bulk materials serving as inputs for finite elements analyses supporting experiments and results interpretation. The second most important goal was to assess the influence of operating conditions on the integrity of the MEA. Here interactions of ceramic–metal interfaces within the repetition unit operating at high temperatures and as well at both oxidative and reductive atmospheres were investigated. The elastic and fracture responses of MEA extracted from SOC stacks after several hours of service were analysed. Layer delamination and loss of mechanical strength were observed with increasing operational time. Moreover, SEM observations helped to detect significant microstructural changes of the electrodes (e.g. demixing, coarsening, elemental migration and depletion), which might be responsible for decreased electrochemical performances. All the materials presented in this work are part of SOC stacks produced and commercialised by Sunfire GmbH, which is one of the world leading companies in the field.
APA, Harvard, Vancouver, ISO, and other styles
43

BALDACIM, SANDRO A. "Desenvolvimento, processamento e caracterizacao de compositos ceramicos Sisub(3)Nsub(4)-SiCsub(w)." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10877.

Full text
Abstract:
Made available in DSpace on 2014-10-09T12:45:01Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:03:20Z (GMT). No. of bitstreams: 1 07007.pdf: 10191940 bytes, checksum: 90f949a8767cea7a6c8e8cc3d2aee4ee (MD5)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
APA, Harvard, Vancouver, ISO, and other styles
44

Ereifej, Nadia. "Dental ceramics: microstructure and fracture behaviour." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489012.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Browne, David J. "Fracture characteristics of coarse grained ceramics." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254026.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Wang, Yaou. "Failure mechanism and reliability prediction for bonded layered structure due to cracks initiating at the interface." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1236645979.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

SAKAIDA, Yoshihisa, and Keisuke TANAKA. "Evaluation of Fracture Toughness of Porous Ceramics." The Japan Society of Mechanical Engineers, 2003. http://hdl.handle.net/2237/9181.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Tiernan, Declan Martin. "Collocation studies in fracture mechanics and quantum mechanics." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318739.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Mansfield-Williams, H. D. "Mode 11 fracture mechanics in solid wood and fracture mechanics in laminated veneer lumber." Thesis, Brunel University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390815.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Denning, Shawn Patrick. "Fracture mechanics of sandwich structures." Thesis, Wichita State University, 2013. http://hdl.handle.net/10057/6809.

Full text
Abstract:
Over the past few decades both the demand for knowledge as well an increase in the application of composite materials has boomed. This has led to an intensive focus by the research community to gather information and validate the use of such materials. Sandwich composites have been a particular interest and an intense demand for further understanding was sparked by the catastrophic rudder failure of Air Transat 961. This thesis focuses on understanding fracture mechanics and damage tolerance within sandwich composites. Facesheet disbond has severe impacts on the material systems strength and stiffness, and large disbonds can often lead to catastrophic component failure. Understanding how these disbonds grow is paramount to recognizing the limitations of sandwich composites. This thesis has several objectives. First, determine the fracture toughness of various sandwich composite material systems under going quasi-static loading. Second, determine how variations within the material systems such as facesheet thickness, core type, cell size and core density effect the results. Third, determine how the failure modes such as adhesive, pullout and core alter the results. Fourth, determine how fluid ingression effects fracture toughness. Fifth, provide baseline data for further testing and modeling.
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Aerospace Engineering
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Fracture mechanics of ceramics' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography