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Results for 'titan'
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Étude des mécanismes à l'origine de la phase alpha à petite échelle dans les alliages de titane bêta
Le présent travail se concentre sur l'étude de différents mécanismes permettant d'obtenir des précipités alpha de petite taille répartis de manière homogène dans la matrice bêta des alliages de titane bêta. La précipitation de phases métastables (telles que la phase oméga) lors du vieillissement à basse température et leur influence sur la précipitation alpha sont étudiées en détail. La séquence de précipitation lors d'un vieillissement direct au-dessus de la température de solvus de l'oméga est également évaluée. L'évolution de la structure et de la composition de la phase de précipitation est déterminée à l'aide de multiples outils de caractérisation (3DAP, TEM, SEM, XRD synchrotron). La possibilité de l'apparition d'autres mécanismes de précipitation non classiques ne nécessitant pas de sites de nucléation hétérogènes est également analysée. Enfin, l'influence de l'élément interstitiel, l'oxygène, sur la précipitation alpha lors de l'oxydation du Beta 21S a été déterminée. La pénétration de l'oxygène et son influence sur la microstructure ont également été corrélées aux propriétés mécaniques mesurées.
€ 66,90 -
Estudio de los mecanismos de la fase alfa a escala fina en aleaciones de titanio beta
El presente trabajo se centra en el estudio de diferentes mecanismos para diseñar precipitados alfa de tamaño fino distribuidos de forma homogénea en la matriz beta de las aleaciones de titanio beta. Se estudia en detalle la precipitación de fases metaestables (como la fase omega) tras el envejecimiento a baja temperatura y su influencia en la precipitación alfa. También se evalúa la secuencia de precipitación en el envejecimiento directo por encima de la temperatura de solvus de la fase omega. La evolución estructural y composicional de la fase de precipitado se determina utilizando múltiples herramientas de caracterización (3DAP, TEM, SEM, XRD de sincrotrón). También se analiza la posibilidad de que se produzcan otros mecanismos de precipitación no clásicos que no requieran sitios de nucleación heterogénea. Por último, se ha determinado la influencia del elemento intersticial, el oxígeno, en la precipitación alfa durante la oxidación de Beta 21S. La entrada de oxígeno y su influencia en la microestructura también se han correlacionado con las propiedades mecánicas medidas.
€ 66,90 -
Studio dei meccanismi alla base della fase alfa a scala fine nelle leghe di titanio beta
Il presente lavoro si concentra sullo studio di diversi meccanismi per ottenere precipitati alfa di dimensioni fini distribuiti in modo omogeneo nella matrice beta delle leghe di titanio beta. Viene studiata in dettaglio la precipitazione di fasi metastabili (come la fase omega) in seguito all'invecchiamento a bassa temperatura e la loro influenza sulla precipitazione alfa. Viene inoltre valutata la sequenza di precipitazione nell'invecchiamento diretto al di sopra della temperatura di solvus omega. L'evoluzione strutturale e composizionale della fase di precipitato è determinata utilizzando diversi strumenti di caratterizzazione (3DAP, TEM, SEM, XRD al sincrotrone). Viene inoltre analizzata la possibilità che si verifichino altri meccanismi di precipitazione non classici che non richiedono siti di nucleazione eterogenei. Infine, è stata determinata l'influenza dell'elemento interstiziale ossigeno sulla precipitazione alfa durante l'ossidazione del Beta 21S. L'ingresso di ossigeno e la sua influenza sulla microstruttura sono stati inoltre correlati alle proprietà meccaniche misurate.
€ 66,90 -
Untersuchung der Mechanismen für feinverteilte Alpha-Phasen in Beta-Titanlegierungen
Die vorliegende Arbeit konzentriert sich auf die Untersuchung verschiedener Mechanismen zur Erzeugung homogen verteilter feinkörniger Alpha-Ausscheidungen in der Beta-Matrix von Beta-Titanlegierungen. Die Ausscheidung metastabiler Phasen (wie der Omega-Phase) bei der Alterung bei niedrigen Temperaturen und deren Einfluss auf die Alpha-Ausscheidung werden eingehend untersucht. Die Ausscheidungssequenz bei direkter Alterung oberhalb der Omega-Solvustemperatur wird ebenfalls bewertet. Die strukturelle und chemische Entwicklung der Ausscheidungsphase wird mithilfe verschiedener Charakterisierungsverfahren (3DAP, TEM, SEM, Synchrotron-XRD) bestimmt. Die Möglichkeit des Auftretens anderer nicht-klassischer Ausscheidungsmechanismen, die keine heterogenen Keimbildungsstellen erfordern, wird ebenfalls analysiert. Schließlich wurde der Einfluss des Interstitialelements Sauerstoff auf die Alpha-Ausscheidung während der Oxidation von Beta 21S bestimmt. Das Eindringen von Sauerstoff und dessen Einfluss auf die Mikrostruktur wurden zudem mit den gemessenen mechanischen Eigenschaften in Zusammenhang gebracht.
€ 66,90 -
Estudo dos mecanismos da fase alfa em escala fina em ligas de titânio beta
O presente trabalho centra-se num estudo de diferentes mecanismos para criar precipitados alfa de tamanho fino distribuídos de forma homogénea na matriz beta de ligas de titânio beta. A precipitação de fases metaestáveis (tais como a fase omega) após envelhecimento a baixa temperatura e a sua influência na precipitação alfa são estudadas em detalhe. A sequência de precipitação no envelhecimento direto acima da temperatura de solvus da fase omega é também avaliada. A evolução estrutural e composicional da fase de precipitado é determinada utilizando múltiplas ferramentas de caracterização (3DAP, TEM, SEM, XRD de sincrotrão). A possibilidade de ocorrência de outros mecanismos de precipitação não clássicos que não requerem sítios de nucleação heterogéneos é também analisada. Por último, foi determinada a influência do elemento intersticial, o oxigénio, na precipitação alfa durante a oxidação do Beta 21S. A penetração de oxigénio e a sua influência na microestrutura também foram correlacionadas com as propriedades mecânicas medidas.
€ 66,90 -
Synthesis And Characterization Of Titanium Nitride Coating On HSS
In the era of advanced materials and surface engineering, magnetron sputtering has emerged as a powerful technique for developing high-performance coatings. This book explores the synthesis of functional coatings through controlled sputtering processes and provides in-depth insights into their structural and property evolution. Through systematic characterization and analysis, the study reveals how tailored coatings can enhance durability, corrosion resistance, and overall material performance. This work bridges the gap between experimental research and practical applications, making it highly relevant for both academia and industry.
€ 48,90 -
Lithium Storage in Titania Films: Unification of Insertion Electrode and Supercapacitor Concepts
This book presents a comprehensive investigation of charge storage in a mixed conductor (general materials case). As it includes bulk and boundary zones, it leads to a unification of battery insertion electrode and supercapacitor storage concepts, which are unnecessarily considered as two separate phenomena. Following and extending the quantitative concept of job-sharing storage, a generalized picture that encompasses bulk and space charge storage (insertion electrode and supercapacitor storage) is developed. The system under consideration is titanium dioxide (TiO2) thin films, in which lithium is inserted, and the results are evaluated as a function of distance from the current collector. Measuring the capacity as a function of size enables distinguishing between bulk storage (lithium ions and electrons stored in TiO2) and space charge storage at the interface (lithium ions stored on the TiO2 side of the interface to the current collector, and electrons on the current collector's side). Variation of size and nature of the current collector allows optimizing the ratio of energy to power density, which was not possible before. In the same context, this thesis investigates the space charge behavior in a discretized manner rather than by using the analytical Poisson-Boltzmann function. In this way, a more precise definition and demarcation of electrode and double layer capacity is achieved. This thesis opens new avenues for tailoring power versus energy density in examples of practical interest, addressing one of the central challenges in energy research. This book benefits students and researchers interested in defect chemistry, electrochemistry, and energy storage research.
€ 148,50 -
Innovative and Functionalized Polymers
This Reprint collects selected contributions from the Special Issue dedicated to innovative and functionalized polymers, offering an updated overview of recent advances in polymer science and engineering. In recent years, significant progress has been achieved in the development of natural and synthetic polymers with enhanced mechanical, thermal, electrical, and surface properties, expanding their potential across multiple high-value applications. Modern strategies for polymer processing and modification include chemical functionalization, incorporation of nano- and micro-scale fillers, fabrication of hybrid and composite systems, and advanced manufacturing techniques that enable precise control over morphology and structural architecture. The possibility of tailoring composition, porosity, interface properties, and three-dimensional organization has paved the way for next-generation materials designed for flexible electronics, sensing technologies, energy systems, soft devices, and biomedical applications. This Reprint highlights interdisciplinary research focused on the design, development, characterization, and practical implementation of advanced polymer-based materials. It provides a comprehensive perspective on current trends and emerging directions in the field, emphasizing multifunctionality, performance optimization, and application-driven innovation.
€ 97,00 -
Gemini 9A
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Gemini 9A (officially Gemini IX-A) was a 1966 manned spaceflight in NASA's Gemini program. It was the 7th manned Gemini flight, the 13th manned American flight and the 23rd spaceflight of all time (includes X-15 flights over 100 kilometres (62 mi)). Stafford and Cernan became the first backup crew to fly in space since Scott Carpenter replaced Deke Slayton on MA-7. The original prime crew for Gemini IX, Elliott See (Command Pilot) and Charles Bassett (Pilot), were both killed on February 28, 1966 (four months before the mission) when their plane crashed into the McDonnell building in St. Louis, Missouri where their spacecraft was being built.
€ 196,00 -
Samuil Guz
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Samuil Yurievich Guz ( December 5, 1905, Melitopol, Russia - May 29, 1969, Zaporozhye, USSR) was an important innovator in Soviet Metallurgical Industry and one of the founders of the Soviet Titanium Industry.Samuil Yurievich Guz was born to a Jewish family in South-Western Russia (currently Ukraine), and received his engineering degree in 1927 from the evening division of rabfak, Odessa, (currently Ukraine). He worked at the Dneprovsky Magnesium Works (currently Zaporozhye Titanium-Magnesium Plant) in Zaporozhye, USSR (currently Ukraine). He fought in the Winter War of 1939-1940.
€ 156,00 -
Bernard 70
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Bernard 70 was a 1920s design for a French single-seat monoplane fighter aircraft by the Société des Avions Bernard. It was not built but was developed into a racing monoplane designated the Bernard S-72. It was further developed into single-seat fighters, the Bernard 74 and Bernard 74, although only two of the fighters were built.
€ 136,00 -
Dornier Do K
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Dornier Do K was a German commercial passenger and freight monoplane designed by Claudius Dornier and built by Dornier Flugzeugwerke. Only three prototypes of different designs were built and the type was not a commercial success.
€ 136,00