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Literatura académica sobre el tema "In situ TEM nanoindentation"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "In situ TEM nanoindentation"

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Carlton, C. E. y P. J. Ferreira. "In situ TEM nanoindentation of nanoparticles". Micron 43, n.º 11 (noviembre de 2012): 1134–39. http://dx.doi.org/10.1016/j.micron.2012.03.002.

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Warren, Oden L., Zhiwei Shan, S. A. Syed Asif, Eric A. Stach, J. W. Morris y Andrew M. Minor. "In situ nanoindentation in the TEM". Materials Today 10, n.º 4 (abril de 2007): 59–60. http://dx.doi.org/10.1016/s1369-7021(07)70051-2.

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Minorl, A. M., E. A. Stach y J. W. Morris. "Quantitative In-Situ Nanoindentation of Thin Films in a Transmission Electron Microscope". Microscopy and Microanalysis 7, S2 (agosto de 2001): 912–13. http://dx.doi.org/10.1017/s1431927600030634.

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A unique in situ nanoindentation stage has been built and developed at the National Center for Electron Microscopy in Berkeley, CA. By using piezoceramic actuators to finely position a 3-sided, boron-doped diamond indenter, we are able to image in real time the nanoindentation induced deformation of thin films. Recent work has included the force-calibration of the indenter, using silicon cantilevers to establish a relationship between the voltage applied to the piezoactuators, the displacement of the diamond tip, and the force generated.In this work, we present real time, in situ TEM observations of the plastic deformation of Al thin films grown on top of lithographically-prepared silicon substrates. The in situ nanoindentations require a unique sample geometry (see Figure 1) in which the indenter approaches the specimen normal to the electron beam. in order to meet this requirement, special wedge-shaped silicon samples were designed and microfabricated so that the tip of the wedge is sharp enough to be electron transparent.
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Liu, Dongdong, Zhenyu Zhang, Leilei Chen, Dong Wang, Junfeng Cui, Keke Chang y Dongming Guo. "An in situ TEM nanoindentation-induced new nanostructure in cadmium zinc telluride". Nanoscale 13, n.º 15 (2021): 7169–75. http://dx.doi.org/10.1039/d1nr00447f.

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Ma, X. G. y K. Komvopoulos. "In situ Transmission Electron Microscopy and Nanoindentation Studies of Phase Transformation and Pseudoelasticity of Shape-memory Titanium-nickel Films". Journal of Materials Research 20, n.º 7 (1 de julio de 2005): 1808–13. http://dx.doi.org/10.1557/jmr.2005.0226.

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Transmission electron microscopy (TEM) and nanoindentation, both with in situ heating capability, and electrical resistivity measurements were used to investigate phase transformation phenomena and thermomechanical behavior of shape-memory titanium-nickel (TiNi) films. The mechanisms responsible for phase transformation in the nearly equiatomic TiNi films were revealed by heating and cooling the samples inside the TEM vacuum chamber. Insight into the deformation behavior of the TiNi films was obtained from the nanoindentation response at different temperatures. A transition from elastic-plastic to pseudoelastic deformation of the martensitic TiNi films was encountered during indentation and heating. In contrast to the traditional belief, the martensitic TiNi films exhibited a pseudoelastic behavior during nanoindentation within a specific temperature range. This unexpected behavior is interpreted in terms of the evolution of martensitic variants and changes in the mobility of the twinned structures in the martensitic TiNi films, observed with the TEM during in situ heating.
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Zhang, Zhenyu, Junfeng Cui, Keke Chang, Dongdong Liu, Guoxin Chen, Nan Jiang y Dongming Guo. "Deformation induced new pathways in silicon". Nanoscale 11, n.º 20 (2019): 9862–68. http://dx.doi.org/10.1039/c9nr01478k.

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Liu, Y., H. Wang y X. Zhang. "In Situ TEM Nanoindentation Studies on Stress-Induced Phase Transformations in Metallic Materials". JOM 68, n.º 1 (30 de noviembre de 2015): 226–34. http://dx.doi.org/10.1007/s11837-015-1707-y.

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Wang, Bo, Zhenyu Zhang, Junfeng Cui, Nan Jiang, Jilei Lyu, Guoxin Chen, Jia Wang et al. "In Situ TEM Study of Interaction between Dislocations and a Single Nanotwin under Nanoindentation". ACS Applied Materials & Interfaces 9, n.º 35 (23 de agosto de 2017): 29451–56. http://dx.doi.org/10.1021/acsami.7b11103.

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De Hosson, Jeff T. M., Wouter A. Soer, Andrew M. Minor, Zhiwei Shan, Eric A. Stach, S. A. Syed Asif y Oden L. Warren. "In situ TEM nanoindentation and dislocation-grain boundary interactions: a tribute to David Brandon". Journal of Materials Science 41, n.º 23 (diciembre de 2006): 7704–19. http://dx.doi.org/10.1007/s10853-006-0472-2.

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Wall, M. A. y U. Dahmen. "Development of an In-Situ Nanoindentation Specimen Holder for the High Voltage Electron Microscope". Microscopy and Microanalysis 3, S2 (agosto de 1997): 593–94. http://dx.doi.org/10.1017/s1431927600009855.

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Progress on the development of an in-situ nanoindentation specimen holder for the Kratos 1.5MeV HVEM located at the National Center for Electron Microscopy, Berkeley, CA, USA, is reported. There is currently considerable work being reported on the mechanical properties (i.e., hardness, delamination, wear, etc.) of single and multicomponent thin films, nanoclusters and fibers by techniques such as nanoindenting, ref. [1] are recent examples. However, with all of these tests there has not been direct, unambiguous observation of the response or evolution of the microstructure. With many of these reports, there has been little “post-mortem” TEM characterization and there has been no real attempts to simulate these dynamically in the TEM. For the case of nano-testing of the materials the interaction volumes are often on the scale of the natural sampling volume of the HVEM. It seems natural that post-mortem and in-situ TEM characterization techniques be applied.
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Tesis sobre el tema "In situ TEM nanoindentation"

1

Calvié, Emilie. "Contribution de la nanoindentation in situ en Microscopie Electronique en Transmission à l'étude des céramiques". Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0098.

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La connaissance du comportement et des propriétés des matériaux est d’une grande importance pour optimiser leur mise en forme et adapter leur utilisation. Pour étudier ces propriétés de nombreuses techniques sont couramment utilisées : les essais de traction, la microindentation, la nanoindentation instrumentée… Aujourd’hui, un intérêt particulier est porté sur les nanomatériaux et matériaux nanostructurés car ils présentent souvent des propriétés différentes et plus intéressantes. La nanoindentation instrumentée, notamment, permet de déterminer des paramètres matériaux de manière locale. Cependant, le comportement en temps réel ne peut être observé et l’échantillon ne doit pas être de dimension trop faible (typiquement, l’étude de nanoparticules n’est pas envisageable). Le principal atout de la nanoindentation in situ en Microscopie Electronique en Transmission vis-à-vis des autres techniques existantes est la possibilité d’étudier le comportement de nano-objets ou des comportements très locaux et en temps réel, tout en observant les transformations subies par le matériau. Dans cette étude, nous avons évalué les potentialités de cette nouvelle technique via l’analyse de céramiques très étudiées au laboratoire notamment en tant que biomatériaux : la zircone stabilisée et l’alumine. Dans le cas de la zircone (stabilisée à l’yttrium ou au cérium), le but était de localiser à l’échelle nanométrique les contraintes responsables ou inhérentes à la transformation de phase quadratique-monoclinique, phénomène ayant une très grande influence sur les propriétés du matériau massif. Pour ce faire, après avoir déterminé une technique de préparation adaptée, nous proposons une voie d’étude pour la localisation des contraintes liées à la transformation de phase : le CBED (Convergent Beam Electron Diffraction) couplé à la nanoindentation in situ. Dans le cas de l’alumine, l’objectif était d’étudier le matériau (commercial et non un matériau modèle) dans sa forme originelle à savoir sous forme de nanoparticules d’alumine de transition. L’idée était d’étudier le comportement de ces nanoparticules sous compression. Nous avons notamment constaté que ces particules pouvaient subir une grande déformation plastique à température ambiante. Nous avons pu également, sur quelques particules, obtenir une série d’images en cours de compression ainsi que la courbe de charge-déplacement correspondante. Ces résultats ont ensuite été soumis à une analyse des images couplée à une simulation de type Eléments Finis (réalisées par le LAMCOS)
Knowledge of the behavior and properties of materials is of great importance to optimize their processing and adapt their use. To study these properties, many techniques are commonly used: tensile tests, microindentation, instrumented nanoindentation ... Today, particular interest is focused on nanomaterials and nanostructured materials because they often have different and more interesting properties. Instrumented nanoindentation allow to determine material parameters. However, the real-time behavior can not be observed and the study of nano-objects is difficult (nanoparticles for example). The main advantage of in situ TEM (Transmission Electron Microscopy) nanoindentation is the ability to study the behavior of nano-objects in real time. In this study, we evaluated the potential of this new technique by analyzing ceramics extensively studied in the laboratory such as biomaterials: stabilized zirconia and alumina. In the case of zirconia (stabilized with yttrium or cerium), the goal was to locate at the nanoscale, the constraints responsible for the tetragonal to monoclinic phase transformation. This phenomenon having a great influence on the bulk material properties. To do this, after having determined a suitable preparation method, we suggest a way to study the localization of constraints: the CBED (Convergent Beam Electron Diffraction) coupled with in situ TEM nanoindentation. In the case of alumina, the goal was to study the material in its original form (nano powder of transition alumina). The idea was to study the behavior of these nanoparticles under compression. We particularly observed that these particles could undergo large plastic deformation at room temperature. We have also obtained during compression on few particles, series of images and the corresponding load-displacement curve. These results were then analyzed by image analysis coupled with Finite Element simulations (performed in LAMCOS lab)
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2

Guitton, Antoine. "Mécanismes de déformation des phases MAX : une approche expérimentale multi-échelle". Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2280/document.

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Il est couramment admis que la déformation plastique des phases MAX est dueau glissement de dislocations dans les plans de base s'organisant en empilements et murs. Cesderniers peuvent former des zones de désorientation locale appelées kink bands. Cependant, lesmécanismes élémentaires et le rôle exact des défauts microstructuraux sont encore mal connus. Cemanuscrit présente une étude expérimentale multi-échelle des mécanismes de déformation de laphase MAX Ti2AlN. A l'échelle macroscopique, deux types d'expériences ont été menés. Des essaisde compression in-situ à température et pression ambiantes couplés à la diffraction neutroniqueont permis de mieux comprendre le comportement des différentes familles de grains dans le Ti2AlNpolycristallin. Des essais de compression sous pression de confinement ont également été réalisés dela température ambiante jusqu'à 900 °C. À l'échelle mésoscopique, les microstructures des surfacesdéformées ont été observées par MEB et AFM. Ces observations complétées par des essais denanoindentation ont montré que la forme des grains et leur orientation par rapport à la directionde sollicitation gouvernent l'apparition de déformations intra- et inter-granulaires ainsi que lalocalisation de la plasticité. Finalement à l'échelle microscopique, une étude détaillée par METdes échantillons déformés sous pression de confinement a révélé la présence de configurations dedislocations inédites dans les phases MAX, telles que des réactions entre dislocations, des dipôleset des dislocations hors plan de base. À la vue de ces résultats nouveaux, les propriétés mécaniquesdes phases MAX sont rediscutées
It is commonly believed that plastic deformation mechanisms of MAX phases consistin basal dislocation glide, thus forming pile-ups and walls. The latter can form local disorientationareas, known as kink bands. Nevertheless, the elementary mechanisms and the exact role ofmicrostructural defects are not fully understood yet. This thesis report presents a multi-scale experimentalstudy of deformation mechanisms of the Ti2AlN MAX phase. At the macroscopic scale,two kinds of experiments were performed. In-situ compression tests at room temperature coupledwith neutron diffraction brought new insight into the deformation behavior of the different grainfamilies in the polycrystalline Ti2AlN. Compression tests from the room temperature to 900 °Cunder confining pressure were also performed. At the mesoscopic scale, deformed surface microstructureswere observed by SEM and AFM. These observations associated with nanoindentationtests showed that grain shape and orientation relative to the stress direction control formationof intra- and inter- granular strains and plasticity localization. Finally, at the microscopic scale,a detailed dislocation study of samples deformed under confining pressure revealed the presenceof dislocation configurations never observed before in MAX phases, such as dislocation reactions,dislocation dipoles and out-of-basal plane dislocations. In the light of these new results, mechanicalproperties of MAX phases are discussed
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3

Johnson, Lars. "Nanoindentation in situ a Transmission Electron Microscope". Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8333.

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The technique of Nanoindentation in situ Transmission Electron Microscope has been implemented on a Philips CM20. Indentations have been performed on Si and Sapphire (α-Al2O3) cut from wafers; Cr/Sc multilayers and Ti3SiC2 thin films. Different sample geometries and preparation methods have been evaluated. Both conventional ion and Focused Ion Beam milling were used, with different ways of protecting the sample during milling. Observations were made of bending and fracture of samples, dislocation nucleation and dislocation movement. Basal slip was observed upon unloading in Sapphire. Dislocation movement constricted along the basal planes were observed in Ti3SiC2. Post indentation electron microscopy revealed kink formation in Ti3SiC2 and layer rotation and slip across layers in Cr/Sc multilayer stacks. Limitations of the technique are presented and discussed.

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4

Hummelgård, Magnus. "In-situ TEM Probing of Nanomaterials". Doctoral thesis, Mittuniversitetet, Institutionen för naturvetenskap, teknik och matematik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-8998.

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Nanomaterials because of their small size, may have special properties unlikely to be seen in ordinary types of materials. Nanomaterials like nanotubes,nanowires and nanoparticles are best studied at the nanoscale, vital but also problematic. In this thesis we use a transmission electron microscope (TEM)combined with a scanning tunneling microscope probe. This system allows TEM images to be captured and recorded into a movie together with recordedelectrical data for real time analysis. Using this method we found that the electrical conductivity of molybdenumbased nanowires Mo6S3I6 can be improved by current induced transformation. This might be a general method of improving nanowires which is of high valueif the wires are to be used in electrical circuits or field emission devices. The bending modulus for these nanowires were also determined, by an electromechanical resonance method, to 4.9 GPa. The sintering phase of silver nanoparticles, used in electrical conductive ink for printing electrical circuits, were studied by the in-situ TEM probing method. We observed that percolation path ways are formed and that the dispersive agent of the particles can be pyrolysed into a net of carbon with characteristics similar to graphite. We also developed a method for decorating nanowires and nanotubes with gold nanoparticles. Nanowire particle composites are often used in assembling more complex devices (electronic circuits) or for linking to organic molecules (biosensor applications) and existing particle decoration methods are either difficult or with low yield. By in situ TEM probing we found that carbon nanocages can be grown onto these gold nanoparticles. The size of the gold nanoparticles is controllable an thus the size of the nanocages. These nanocages may be used in medicine- or hydrogen storage-applications.
Nanomaterial har givits stort intresse under det senaste årtiondet, detta på grund av deras unika egenskaper som gör att de i många hänseenden överträffar traditionella material. Egenskaperna beror till största del på storlek och därför är det nödvändigt att studera dessa material på nanonivå, något som är problematiskt. För sådana studier krävs ett instrument med tillräckligt hög upplösning på nanonivå samt ett system med en prob som möjligör selektion och karakterisering utav individuella byggstenar. I denna avhandling används ett transmissionselektronmikroskop (TEM) tillsammans med ett sveptunnelmikroskop (STM) där det senare används som prob. Systemet medger studier på nanonivå och karakterisering av enskilda byggstenar under realtids avbildning (in situ). Metoden medger en bättre överblick och hanterbarhet vid nanomanipulering än vad till exempel atomkraftmikroskopi medger. Piezodrivna probar kan även användas i svepelektronmikroskop men dessa medger inte samma upplösning som transmissionselektronmikroskopet. Nanotrådar av Mo6S3I6 är ett alternativt material till kolnanorör och överträffar dessa i form av löslighet i båda organiska såväl som polära lösningsmedel. De är enkla att syntetisera men deras elektriska konduktivitet är låg. Mo6S3I6 nanotrådar studerades med in situ TEM probing. Vi fann att genom att driva en tillräckligt hög elektrisk ström genom nanotråden så resulterade detta i en omvandling till en solid metallisk molybden nanotråd med en konduktivitet nära värdet för bulkmaterialet. Resultat är intressant då nanotrådar kan användas i t.ex. fältemission, men resultatet visar också på att det kan vara en generell metod för att förbättra nanotrådar överlag. På dessa nanotrådar har även en elektromekanisk resonans studie utförts där böjmodulen för materialet bestämdes till 4.9 GPa. Med in situ-TEM-probing metoden har även silvernanobläck studerats under en sintringsprocess. Studien visade att vid sintringen så bildas perkulativa vägar genom bläckets silvernanopartiklar samt att vid hög sinteringstemperatur förkolnades det lösningsmedel som silvernanopartiklarna är lösta i. Förkolningen av lösningsmedlet resulterade i ett kolnät med liknande egenskaper som för grafit. Förståelse utav sinteringsprocessen är nödvändig eftersom vid tryckning av elektriskt ledande banor på papper används sintring för att höja ledningsförmågan. Genom att växa nanopartiklar på nanotrådar förändras deras egenskaper och tillämpningar. Existerande metoder är endera komplicerade eller ger dåligt ut- byte. Ett enkelt recept för att växa guldnanopartiklar på kolnanorör och Mo6S3I6 nanotrådar har därför tagits fram. Dessa kolnanorör och nanotrådar har sedan studerats med in-situ-TEM-probing metoden som visade att utanpå dessa guldnanopartiklar kan burar av kol skapas. Eftersom partiklarnas storlek kan kontrolleras kan även kolnanoburarnas storlek kontrolleras. Burarna har användningsområden t.ex. inom medicin och vid lagring av vätgas.
The thesis covers six scientific papers
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Barnoush, Afrooz. "Hydrogen embrittlement, revisited by in situ electrochemical nanoindentation". Aachen Shaker, 2007. http://d-nb.info/992479851/04.

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Sylvain, Wilgens. "Étude de la plasticité du monocristal de phase MAX par déformation aux petites échelles". Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2307/document.

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L'objectif de cette thèse est l'étude de la déformation, à l'échelle microscopique, de la phase MAX Ti2AlN, synthétisée par métallurgie des poudres. Ce travail se divise en trois parties : une première dans laquelle l'accent a été mis sur l'hystérèse mécanique des phases MAX via des essais cyclés, en nanoindentation sphérique et compression ex-situ de micro-piliers, sur des grains d'orientations différentes déterminées par l'EBSD. Dans la deuxième nous nous sommes intéressés à la déformation de micropiliers via des essais de compression cyclés in-situ couplés à la micro-diffraction Laue. L'objectif a été d'analyser les taches diffraction au cours de la déformation du pilier afin de mettre en évidence les mécanismes de déformation élémentaires mis en jeu et d'observer les structures finales via des images MEB post-mortem des piliers. Enfin, une dernière dans laquelle l'objectif a été l'étude des mécanismes de déformation en température à l'échelle microscopique via des essais de nano-indentation allant jusqu'à 800°C. La caractérisation des lignes de glissement en surface et des configurations microstructurales sous l'empreinte a été réalisée par AFM et MET respectivement. Toutes les données recueillies par ces divers essais aux petites échelles, ont permis d'affiner notre compréhension des mécanismes de déformation du monocristal de phase MAX, notamment vis à vis des modèles usuellement proposés dans la littérature
The thesis's goal is to study the deformation, at microscopic scale, of the MAX phase Ti2AlN synthesized by powder metallurgy. This work is divided into three parts: in the first part, the interest has been put on the hysteretic behavior of the MAX phases via cyclic mechanical solicitations, during spherical indentation tests and ex-situ compression of micro-pillars, on differently orientated grains beforehand determined by EBSD. In the second part, we were interested into the micro-pillar's deformation via insitu cyclic compression tests coupled with Laue micro-diffraction. The goal was to analyse the evolution diffraction lines during the pillar's deformation in order to highlight the elementary deformation mechanisms and to observe the finale structures via the post-mortem SEM imaging of the pillars. Finally, a last part was devoted to study the deformation mechanisms in temperature at microscopic scale via nano-indentation tests up to 800°C. The characterization of the slip lines on the surface has been revealed by AFM and that of t he microstructural configurations (dislocations) under the indent has been done by TEM. All data collected by these various tests at the small scales have refined our understanding of the deformation mechanisms of crystal MAX phase, particularly with respect to the models usually proposed in the literature
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Barnoush, Afrooz [Verfasser]. "Hydrogen embrittlement, revisited by in situ electrochemical nanoindentation / Afrooz Barnoush". Aachen : Shaker, 2009. http://d-nb.info/1161310207/34.

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Hajduček, Jan. "Zobrazování metamagnetických tenkých vrstev pomocí TEM". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443233.

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Komplexní magnetické materiály v nanoměřítku mají své nezastupitelné místo v moderních zařízeních, jako jsou digitální paměti nebo senzory. Moderní technologické procesy vyžadují porozumění a možnost kontroly moderních magnetických materiálů až na atomární úrovni. Jednou z možných cest je magnetická analýza za použití transmisní elektronové mikroskopie (TEM), která je unikátní díky možnosti zobrazování až v subatomárním měřítku. Tato práce popisuje možnosti zobrazování metamagnetických materiálů metodou TEM. Tyto materiály se vyznačují možností stabilizace více magnetických uspořádání najednou za daných vnějších podmínek. Modelovým systémem pro popis zobrazovacích možností metody TEM byly zvoleny tenké vrstvy metamagnetické slitiny FeRh. Tento materiál prochází při zahřívání fázovou přeměnou z antiferomagnetické do feromagnetické fáze. Podrobně jsou rozebrány procesy výroby vzorků, což je zásadní pro úspěšnou TEM analýzu. Pro magnetické zobrazování vzorků v TEMu je využita technika diferenciálního fázového kontrastu (DPC), umožňující přímé mapování rozložení magnetické indukce ve vzorku. Důsledně je diskutován vznik signálu v DPC, což je nezbytné pro porozumění a analýzu výsledných dat. FeRh vrstvy jsou podrobeny analýze struktury, chemického složení a především magnetických vlastností obou magnetických fází. Závěrem je představen proces přímého ohřevu metamagnetických vrstev v TEMu.
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Vineis, Christopher J. (Christopher Joseph) 1974. "Characterization of OMVPE-grown GaSb-based epilayers using in situ reflectance and ex situ TEM". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8452.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2001.
Includes bibliographical references (leaves 227-238).
The focus of this thesis was to investigate and characterize GaSb, GaInAsSb, and AlGaAsSb epilayers grown by organometallic vapor phase epitaxy (OMVPE). These epilayers were principally characterized using in situ spectral reflectance and ex situ transmission electron microscopy (TEM). An in situ spectral (380-1100 nm) reflectance monitoring system was designed and fitted to the OMVPE reactor. It was determined that longer wavelengths are more useful for quantitative growth rate analysis, while shorter wavelengths are more sensitive to the GaSb substrate oxide desorption process. It was also determined that the GaInAsSb and AlGaAsSb alloy compositions could be determined accurately using in situ reflectance ratios. Use of the in situ reflectance monitor to efficiently perform necessary reactor/growth calibrations was also demonstrated. Analytic functions were used to model the refractive indices of GaSb, AlGaAsSb, and GaInAsSb. Specifically, Adachi's Model Dielectric Function [1, 2] was curve-fit to data for GaSb between 400 and 1000 nm, and fourth-order polynomials were fit to data for GaSb and GaInAsSb between 1 and 3 gnm. A linear interpolation of binary functions was used to generate a refractive index model for AlGaAsSb between 1 and 3 m as a function of Al fraction. These models were helpful in interpreting in situ reflectance data, and also in designing distributed Bragg reflectors. Phase separation in GaInAsSb was studied using TEM. A wide range of microstructures was observed, from nearly homogeneous to strongly phase separated.
(cont.) It was seen that in phase separated samples, the composition modulations typically created and coupled to morphological perturbations in the surface. One interesting manifestation of the phase separation was the spontaneous formation of a natural superlattice (period typically 10-30 nm) throughout the epilayer. This superlattice had two variants: one parallel to the growth surface, and one tilted with respect to the growth surface. It was discovered that the tilted superlattice was coupled to surface to relieve surface strain associated with the superlattice ...
by Christopher J. Vineis.
Ph.D.
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Jia, Xiaoting. "In-situ TEM study of carbon nanomaterials and thermoelectric nanomaterials". Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/69666.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2011.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 103-112).
Graphene nanoribbons (GNRs) are quasi one dimensional structures which have unique transport properties, and have a potential to open a bandgap at small ribbon widths. They have been extensively studied in recent years due to their high potential for future electronic and spintronic device applications. The edge structures - including the edge roughness and chirality - dramatically affect the transport, electronic, and magnetic properties of GNRs, and are of the critical importance. We have developed an efficient way of modifying the edges structures, to produce atomically smooth zigzag and armchair edges by using insitu TEM with a controlled bias. This work provides us with many opportunities for both fundamental studies and for future applications. I also report the use of either furnace heating or Joule heating to pacify the exposed graphene edges by loop formation in the graphitic nanoribbons. The edge energy minimization process involves the formation of loops between adjacent graphene layers. An estimation of the temperature during in-situ Joule heating is also reported based on the melting and evaporation of Pt nanoparticles. In this thesis work, I have also investigated the morphological and electronic properties of GNRs grown by chemical vapor deposition. Our results suggest that the GNRs have a surprisingly high crystallinity and a clean surface. Both folded and open edges are observed in GNRs. Atomic resolution scanning tunneling microscopy (STM) images were obtained on the folded layer and the bottom layer of the GNR, which enables clear identification of the chirality for both layers. We have also studied the electronic properties of the GNRs using low temperature scanning tunneling spectroscopy (STS). Our findings suggest that edges states exist at GNR edges which are dependent on the chiral angles of the GNRs.
by Xiaoting Jia.
Ph.D.
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Libros sobre el tema "In situ TEM nanoindentation"

1

Hugo, Richard Charles. In-situ TEM observations of gallium penetration into aluminum grain boundaries. 1993.

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Structural characterization and gas reactions of small metal particles by high resolution in-situ TEM and TED: Periodic technical report ... for the period, January 1, 1986-December 31, 1986. [Washington, DC: National Aeronautics and Space Administration, 1987.

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United States. National Aeronautics and Space Administration, ed. Structural characterization and gas reactions of small metal particles by high-resolution, in-situ tem and ted: Semi-annual technical report for the period January 1, 1985 to June 30, 1985. Sunnyvale, CA: Eloret Institute, 1985.

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United States. National Aeronautics and Space Administration, ed. Structural characterization and gas reactions of small metal particles by high resolution in-situ TEM and TED: Semi-annual technical report for the period, July 1, 1985 - September 30, 1985, NSDS-grant NCC2-283. [Washington, DC: National Aeronautics and Space Administration, 1985.

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Capítulos de libros sobre el tema "In situ TEM nanoindentation"

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ElFallagh, Fathi, Aiden Lockwood y Beverley Inkson. "In-situ TEM Observation of Deformations in a Single Crystal Sapphire During Nanoindentation". En Advanced Structured Materials, 229–39. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00506-5_16.

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Kacher, Josh, Qian Yu, Claire Chisholm, Christoph Gammer y Andrew M. Minor. "In Situ TEM Nanomechanical Testing". En MEMS and Nanotechnology, Volume 5, 9–16. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22458-9_2.

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Canepa, Silvia, Sardar Bilal Alam, Duc-The Ngo, Frances M. Ross y Kristian Mølhave. "In Situ TEM Electrical Measurements". En Controlled Atmosphere Transmission Electron Microscopy, 281–300. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22988-1_10.

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Zhou, Guangwen y Judith C. Yang. "In-Situ TEM Studies of Oxidation". En In-Situ Electron Microscopy, 191–208. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527652167.ch8.

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Minor, Andrew M. "In-Situ Nanoindentation in the Transmission Electron Microscope". En In-Situ Electron Microscopy, 255–77. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527652167.ch11.

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Tang, Dai-Ming. "In Situ TEM Method and Materials". En In Situ Transmission Electron Microscopy Studies of Carbon Nanotube Nucleation Mechanism and Carbon Nanotube-Clamped Metal Atomic Chains, 23–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37259-9_2.

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Zheng, Kun, Yihua Gao, Xuedong Bai, Renchao Che, Ze Zhang, Xiaodong Han, Yoshio Bando, Shize Yang, Enge Wang y Qi Cao. "In Situ TEM: Theory and Applications". En Springer Tracts in Modern Physics, 381–477. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0454-5_7.

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Costa, Pedro M. F. J. y Paulo J. Ferreira. "In Situ TEM of Carbon Nanotubes". En Advanced Transmission Electron Microscopy, 207–47. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15177-9_7.

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Tan, Xiaoli. "In-Situ TEM with Electrical Bias on Ferroelectric Oxides". En In-Situ Electron Microscopy, 321–46. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527652167.ch14.

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Hattar, Khalid, Thomas Buchheit, Paul Kotula, Alexander McGinnis y Luke Brewer. "Nanoindentation and TEM Characterization of Ion Irridiated 316L Stainless Steels". En Energy Technology 2012, 371–80. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118365038.ch43.

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Actas de conferencias sobre el tema "In situ TEM nanoindentation"

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Zorro, Fátima. "In-Situ Aberration-Corrected TEM Nanoindentation of Silver Nanoparticles". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.1428.

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Pfetzing, J., M. F. X. Wagner, T. Simon, A. Schaefer, Ch Somsen y G. Eggeler. "TEM investigation of the microstructural evolution during nanoindentation of NiTi". En ESOMAT 2009 - 8th European Symposium on Martensitic Transformations. Les Ulis, France: EDP Sciences, 2009. http://dx.doi.org/10.1051/esomat/200906027.

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Mases, Mattias. "Oxidizing nanocarbons: In situ TEM observations". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.789.

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Takahashi, Yasuo y Masashi Arita. "In-situ TEM observation of ReRAM switching". En 2014 IEEE International Meeting for Future of Electron Devices, Kansai (IMFEDK). IEEE, 2014. http://dx.doi.org/10.1109/imfedk.2014.6867091.

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Karki, Khim. "In-situ/operando bulk electrochemistry in TEM". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.1084.

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Kim, M. J., S. Y. Park, D. K. Cha, J. Kim, H. C. Floresca, Ning Lu y J. G. Wang. "In-situ TEM characterization of nanomaterials and devices". En 2011 IEEE Nanotechnology Materials and Devices Conference (NMDC 2011). IEEE, 2011. http://dx.doi.org/10.1109/nmdc.2011.6155318.

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Persson, Axel. "Time-resolved compositional mapping for in-situ TEM". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.256.

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Karki, Khim. "In situ/operando Study of Photocatalysis in TEM". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.1088.

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Schryvers, Dominique. "A new deformation mechanism in Olivine? Ex-situ and in-situ TEM studies". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.673.

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Nafari, A., D. Karlen, C. Rusu, K. Svensson, H. Olin y P. Enoksson. "MEMS sensor for in situ TEM Atomic Force Microscopy". En 2007 20th IEEE International Conference on Micro Electro Mechanical Systems - MEMS '07. IEEE, 2007. http://dx.doi.org/10.1109/memsys.2007.4433025.

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Informes sobre el tema "In situ TEM nanoindentation"

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Minor, Andrew M. In situ nanoindentation in a transmission electron microscope. Office of Scientific and Technical Information (OSTI), enero de 2002. http://dx.doi.org/10.2172/807441.

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Pan, Xiaoqing. Structure and Dynamics of Domains in Ferroelectric Nanostructures. In-situ TEM Studies. Office of Scientific and Technical Information (OSTI), junio de 2015. http://dx.doi.org/10.2172/1187994.

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Hinks, Jonathan, Graham Greaves y Robert Harrison. TEM with in situ Ion Irradiation of Nuclear Materials under In-Service Conditions. University of Huddersfield, 2016. http://dx.doi.org/10.5920/2016.epm0111351.

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Hsiung, L. In-Situ TEM Observations of Strain-Induced Interface Instability in TiAl/Ti3Al Laminate Composite. Office of Scientific and Technical Information (OSTI), abril de 2003. http://dx.doi.org/10.2172/15007359.

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Edmondson, Philip D. Report on the Installation and Preparedness of a Protochips Fusion in-situ Heating Holder for TEM. Office of Scientific and Technical Information (OSTI), marzo de 2017. http://dx.doi.org/10.2172/1356939.

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Mallamaci, M. P., C. B. Carter y J. Bentley. In-situ TEM crystallization of anorthite-glass films on {alpha}-Al{sub 2}O{sub 3}. Office of Scientific and Technical Information (OSTI), diciembre de 1993. http://dx.doi.org/10.2172/10120380.

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Dillon, Shen J. Final Report: In-Situ TEM Observations of Degradation Mechanisms in Next-Generation High-Energy Density Lithium-Ion Battery Systems. Office of Scientific and Technical Information (OSTI), noviembre de 2017. http://dx.doi.org/10.2172/1406527.

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