Literatura académica sobre el tema "Lithium alliage"
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Artículos de revistas sobre el tema "Lithium alliage"
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Raho, Azzdine y Mouhyddine Kai-Hanifi. "Détermination du coefficient de diffusion du lithium dans un alliage Al-7.4%at.Li". Annales de Chimie Science des Matériaux 29, n.º 5 (septiembre de 2004): 45–54. http://dx.doi.org/10.3166/acsm.29.5.45-54.
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Lee, Sing, Y. K. Wing y K. C. Wong. "Knowledge and Compliance towards Lithium Therapy among Chinese Psychiatric Patients in Hong Kong". Australian & New Zealand Journal of Psychiatry 26, n.º 3 (septiembre de 1992): 444–49. http://dx.doi.org/10.3109/00048679209072068.
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Although patient education is believed to promote medication compliance, the exact relationship between the acquisition of drug knowledge and compliance during lithium treatment is unclear. A survey of 50 Chinese patients on maintenance lithium therapy revealed that their medical knowledge about lithium treatment, as measured by a “Lithium Questionnaire,” was very limited. Nonetheless, 70% of these patients were found, by multiple criteria, to be good compliers, and lithium compliance was apparently not affected by the amount of drug knowledge that patients possessed. It is argued that in the process of conducting patient education to enhance lithium compliance, a sound therapeutic alliance is more important than sheer knowledge acquisition.
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Le Roy, G. "Les alliages aluminium-lithium : la riposte de l'aluminium". Matériaux & Techniques 74, n.º 5-6 (1986): 187–96. http://dx.doi.org/10.1051/mattech/198674050187.
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Jawad, Ibrahim, Stuart Watson, Peter M. Haddad, Peter S. Talbot y R. Hamish McAllister-Williams. "Medication nonadherence in bipolar disorder: a narrative review". Therapeutic Advances in Psychopharmacology 8, n.º 12 (16 de octubre de 2018): 349–63. http://dx.doi.org/10.1177/2045125318804364.
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A number of effective maintenance medication options exist for bipolar disorder (BD) and these are regarded as the foundation of long-term treatment in BD. However, nonadherence to medication is common in BD. For example, a large data base study in the United States of America (USA) showed that approximately half of patients with BD were nonadherent with lithium and maintenance medications over a 12 month period. Such nonadherence carries a high risk of relapse due to the recurrent nature of the illness and the fact that abrupt cessation of treatment, particularly lithium, may cause rebound depression and mania. Indeed, medication nonadherence in BD is associated with significantly increased risks of relapse, recurrence, hospitalization and suicide attempts and a decreased likelihood of achieving remission and recovery, as well as with higher overall treatment costs. Factors associated with nonadherence include adverse effects of medication, complex medication regimens, negative patient attitudes to medication, poor insight, rapid-cycling BD, comorbid substance misuse and a poor therapeutic alliance. Clinicians should routinely enquire about nonadherence in a nonjudgmental fashion. Potential steps to improve adherence include simple pragmatic strategies related to prescribing including shared decision-making, psychoeducation with a clear focus on adherence, reminders (traditional and digital), potentially using a depot rather than an oral antipsychotic, managing comorbid substance misuse and improving therapeutic alliance. Financial incentives have been shown to improve adherence to depot antipsychotics, but this approach raises ethical issues and its long-term effectiveness is unknown. Often a combination of approaches will be required. The strategies that are adopted need to be patient specific, reflecting that nonadherence has no single cause, and chosen by the patient and clinician working together.
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Chala, Tеtyana G. y Dmytro O. Kornilich. "A Statistical Analysis of the National Market of Lithium-Ion Batteries and the Influence of the Aggression of the russian federation on Its Development". PROBLEMS OF ECONOMY 1, n.º 59 (2024): 146–52. http://dx.doi.org/10.32983/2222-0712-2024-1-146-152.
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The article focuses on the national market of lithium-ion batteries as an energy storage system. The impact of the consequences of the russian invasion of Ukraine on the dynamics of its development is determined. The introduction substantiates the relevance of the chosen topic. The global and national context of market development is outlined, the importance of lithium-ion batteries as the leading technology of secondary batteries is emphasized. In the course of the study, the theoretical and methodological foundations of studying the market of energy storage systems are considered and an analysis of global trends in the development of the world battery market is carried out. Market segmentation is defined. The factors influencing the development of the world market, restraining or accelerating growth are analyzed. An analysis of the national market within the production chain has been carried out. The prospects for the extraction of raw materials, their primary processing, production of battery components (cathode, anode) are separated; the full cycle of production of batteries and final products is considered. The steps taken by Ukraine for the development of the market are considered. The strategic prospects for interaction with the European Battery Alliance (EBA) in order to create a closed ecosystem in the field of batteries within the European Union are highlighted. Data from UN Comtrade, a database of United Nations merchandise trade statistics, was used to statistically analyze imports of lithium-ion batteries into Ukraine. The value of the trend (as an additive component of the time series) of the national market has been allocated using local linear regression by the Friedman method. The practical implementation of this method was carried out using the R Studio software product. Absolute and relative parameters of market dynamics have been determined. The statistics for 2022 as the year of the beginning of the russian aggression against Ukraine are considered; the features and impact of the war on the dynamics of the development of the lithium-ion battery market are determined. It is determined that Ukraine demonstrated outstripping global market growth rates before the start of the war and abnormal consumption in 2022. The carried out research allowed to highlight the consumer nature of the national market, on the one hand, and the global prospects of Ukraine as a player in the production chain, on the other.
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Jackson, Sarah-Nelle. "Consorting with Stone". English Language Notes 58, n.º 2 (1 de octubre de 2020): 101–20. http://dx.doi.org/10.1215/00138282-8557949.
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Abstract This essay places Marie de France’s lai “Yonec” (ca. 1150–1200) and the anonymous Middle English romance King Horn (ca. 1250–1300) in conversation with critical Indigenous theories of relational, land-based sovereignty and resurgence. At first, “Yonec” and King Horn appear to reinscribe a Western form of sovereignty based on exclusive territorial control. Both works offer alternative models of sovereignty and self-determination, however, in their depictions of cooperative, lithic alliance between stone and female consorts. Adopting the term lithic sovereignty to describe the works’ relation-based sovereign imaginaries, this essay first follows the King Horn narrator’s depiction of Godhild’s hermetic retreat into stone when Saracens conquer her husband’s realm. Then it turns to the nameless lady of “Yonec” and her implausible escape from her jealous husband’s tower, facilitated by the very stone that had seemed to entrap her. Drawing on critical Indigenous studies, legal studies, and ecomaterialism, this essay concludes that both King Horn and “Yonec” offer a medieval British imaginary of lithic relational sovereignty that runs counter to teleological, naturalizing narratives of Euro-Western origins.
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McBrayer, Josefine, Katharine L. Harrison, Kyle Fenton y Shelley Minteer. "Mechanical Impacts from Cycling on Silicon Calendar Aging Measurements". ECS Meeting Abstracts MA2023-01, n.º 2 (28 de agosto de 2023): 561. http://dx.doi.org/10.1149/ma2023-012561mtgabs.
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Much of the silicon anodes for lithium ion batteries literature concentrates on the volume expansion of silicon leading to poor cycle life. Recently, the poor calendar life of silicon has become more of a focus. Calendar aging is typically measured by long periods of open circuit voltage (OCV) that are intermittently interrupted with a reference performance test (RPT) to quantify performance and capacity fade. The United States Advanced Battery Consortium LLC protocol calls for an RPT once a month with daily voltage pulses to keep the state of charge the same during the rest. If the solid electrolyte interphase (SEI) is unstable and there is substantial volumetric changes during cycling, as is the case with silicon, the frequency and amount of cycling interruption may impact how calendar life is quantified. It was hypothesized that an SEI that equilibrates during a rest may be disrupted enough during RPT cycling that the SEI passivation is decreased and the start of the next rest will result in greater irreversible lithium inventory consumption to rebuild the SEI that was lost during cycling. To test this, a specially designed variable OCV-RPT protocol was applied to silicon – NMC622 full cells. It was found that for all rest durations, time since assembly, rather than cycling, dominated capacity fade, indicating that calendar aging is likely primarily governed by chemical SEI degradation during rest rather than mechanical SEI degradation during RPTs. This research was supported by the U.S. Department of Energy’s Vehicle Technologies Office under the Silicon Consortium Project, directed by Brian Cunningham, and managed by Anthony Burrell. This work was conducted in part by the Alliance for Sustainable Energy, LLC, the manager and operator of the National Renewable Energy Laboratory for the U.S. Department of Energy (DOE) under Contract No. DE-AC36-08GO28308. Sandia National Laboratories is a multimission Laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
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Buchele, Sebastian, Thomas Boulanger, Eric R. Logan, Louis Hartmann, Ahmed Eldesoky, Saad Azam, Tina Taskovic, Michel Johnson y Michael Metzger. "Towards a Better Understanding of Redox Shuttle Generation in Lfp/Graphite and NMC811/Graphite Cells By Systematic Investigation of Different Electrolyte Additives". ECS Meeting Abstracts MA2022-02, n.º 3 (9 de octubre de 2022): 206. http://dx.doi.org/10.1149/ma2022-023206mtgabs.
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Recent observations by our group show the creation of a reversible shuttle species in LFP/graphite and NMC811/graphite cells with 3:7 ethylene carbonate:dimethyl carbonate (EC:DMC) based electrolytes. This is indicated by a high reversible self-discharge of these cells in the absence of electrolyte additives. Electrolyte extraction from pouch cells after formation allowed to directly investigate the electrolytes for redox shuttle currents. For this purpose, the extracted electrolytes were inserted into coin cells with an Al foil as the working electrode (WE) and a Li foil as the counter electrode (CE). The measured cyclic voltammetry (CV) of the coin cells show a clear relationship between high formation temperature and high shuttle currents. Interestingly, the addition of vinylene carbonate (VC) to the electrolyte completely prevents the shuttle current, even at elevated formation temperatures. [1] In this study, we systematically investigate the effect of various electrolyte additives on the generation of shuttle molecules. LFP/graphite and NMC811/graphite pouch cells were filled with electrolyte consisting of 3:7 EC:DMC with 1.5 M lithium hexafluorophosphate (LiPF6) and different additives. The pouch cells were formed at different temperatures, TF. The electrolytes were then extracted and inserted into the aforementioned coin cell setup for CV measurements. We have found that additives such as VC, fluoroethylene carbonate (FEC), ethylene sulfate (DTD), prop-1-ene-1,3-sultone (PES), and triallyl phosphate (TAP), which are known to create a stable solid electrolyte interphase (SEI), [2-4] prevent shuttle current in the CV. On the other hand, additives such as succinonitrile (SN) and trimethylsilyl isothiocyanate (TMSNCS), which do not contribute to the formation of a better SEI, [5,6] cannot prevent the shuttle current. This suggests that the formation of the shuttles is due to a poor SEI and therefore occurs at the interface between electrolyte and graphite anode. Analogue experiments with DMC as only solvent instead of 3:7 EC:DMC show similar shuttle currents in CVs, which suggests that linear carbonates such as DMC are required to form the shuttle. Figure 1 shows CVs for 1.5 M LiPF6 DMC electrolyte. The shuttle current appears to be the same for electrolyte extracted from LFP/graphite and NMC811/graphite cells ranging up to 6 μA in both cases. This indicates that the shuttle is formed independently of the cathode material, and therefore gives rise to the hypothesis that it is formed at the anode-electrolyte interface. Figure 1 also shows that the shuttle current increases with higher formation temperatures TF. References: Boulanger, A. Eldesoky. S. Buechele, T. Taskovic, S. Azam, C. Aiken, E. Logan, M. Metzger, Investigation of redox shuttle generation in LFP/graphite and NMC811/graphite cells, Submitted (2022). Song, J. Harlow, E. Logan, H. Hebecker, M. Coon, L. Molino, M. Johnson, J. Dahn, M. Metzger, A Systematic Study of Electrolyte Additives in Single Crystal and Bimodal LiNi 0.8 Mn 0.1 Co 0.1 O 2 /Graphite Pouch Cells , J. Electrochem. Soc. 168 (2021) 090503. doi:10.1149/1945-7111/ac1e55. J. Nelson, J. Xia, J.R. Dahn, Studies of the Effect of Varying Prop-1-ene-1,3-sultone Content in Lithium Ion Pouch Cells, J. Electrochem. Soc. 161 (2014) A1884–A1889. doi:10.1149/2.0791412jes. Xia, L. Madec, L. Ma, L.D. Ellis, W. Qiu, K.J. Nelson, Z. Lu, J.R. Dahn, Study of triallyl phosphate as an electrolyte additive for high voltage lithium-ion cells, J. Power Sources. 295 (2015) 203–211. doi:10.1016/j.jpowsour.2015.06.151. Chen, F. Liu, Y. Chen, Y. Ye, Y. Huang, F. Wu, L. Li, An investigation of functionalized electrolyte using succinonitrile additive for high voltage lithium-ion batteries, J. Power Sources. 306 (2016) 70–77. doi:10.1016/j.jpowsour.2015.10.105. G. Han, M.Y. Jeong, K. Kim, C. Park, C.H. Sung, D.W. Bak, K.H. Kim, K.M. Jeong, N.S. Choi, An electrolyte additive capable of scavenging HF and PF5 enables fast charging of lithium-ion batteries in LiPF6-based electrolytes, J. Power Sources. 446 (2020) 227366. doi:10.1016/j.jpowsour.2019.227366. Acknowledgements This work was funded under the auspices of the NSERC/Tesla Canada Alliance Grant program. Figure 1
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Dopheide, Julie A., Amy Werremeyer, Robert J. Haight, Cynthia A. Gutierrez y Andrew M. Williams. "Positioning psychiatric pharmacists to improve mental health care". Mental Health Clinician 12, n.º 2 (1 de abril de 2022): 77–85. http://dx.doi.org/10.9740/mhc.2022.04.077.
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Abstract Psychiatric pharmacy continues to grow and look to the future with a focus on helping individuals recover from mental health and substance use disorders. The American Association of Psychiatric Pharmacists (AAPP) considers Board Certified Psychiatric Pharmacist (BCPP) the gold standard credential that all psychiatric pharmacists should attain to demonstrate specialized knowledge and expertise in psychiatry. BCPPs are part of collaborative interprofessional teams and practice in hospitals, clinics, and diverse health systems. Two out of 3 BCPPs practicing in clinics have prescriptive authority. BCPPs improve access, safety, medication adherence, and therapeutic outcomes. Every person with a mental health and substance use disorder should have access to a BCPP providing comprehensive medication management (CMM) and psychotropic stewardship aimed at improving population health. BCPPs are in demand owing to their expertise. AAPP envisions growth and expansion of the BCPP role in many areas including coordinating psychiatric transitions of care and telehealth services, managing long-acting injectable medication clinics, providing pharmacogenomic consultation, conducting clozapine and lithium monitoring, managing medications for substance use disorders, leading medication groups, CNS drug development, research, and provider education. To prepare the workforce, colleges and schools of pharmacy should hire BCPPs for optimal curriculum development, and each student pharmacist should have an opportunity to develop a therapeutic alliance with a person recovering from psychiatric illness. Postgraduate year (PGY) 1 residencies should offer learning experiences in psychiatric pharmacy to prepare residents to enter an expanded number of PGY2 psychiatric pharmacy residencies, ultimately earning their BCPP and being well positioned to improve mental health care.
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Gadekar, Charusmita, Juan José García-Granero, Marco Madella, Carla Lancelotti, Ghulam Muhiuddin Veesar, Tasleem Alam Abro, Muhammad Amin Chandio y Debora Zurro. "Phytoliths and lithics: An alliance of convenience? Performing first comprehensive residue analysis for the artefacts of the Indus Civilisation". Journal of Archaeological Science: Reports 52 (diciembre de 2023): 104254. http://dx.doi.org/10.1016/j.jasrep.2023.104254.
Texto completoTesis sobre el tema "Lithium alliage"
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Sanchez, Patrick. "Elaboration d'un alliage lithium-bore à haute teneur en lithium zéro-valent étude des propriétés structurales et physiques : applications aux générateurs électrochimiques au lithium /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376184327.
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Reynier, Bertrand. "Etude par diffractometrie x du comportement en fatigue d'un alliage d'aluminium-lithium grenaille". Paris, ENSAM, 1993. http://www.theses.fr/1993ENAM0019.
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L'aluminium-lithium est particulierement interessant pour les industries aerospatiales du fait de sa densite reduite et du gain en resistance mecanique. Un nouvel alliage a ete developpe recemment, le 2091, afin de reunir des proprietes de resistance a l'endommagement, a la corrosion sous contrainte et de tenacite. Cependant, avant d'introduire ce nouveau materiau dans la fabrication des avions, on doit prendre soin d'etudier precisement son comportement en fatigue, particulierement apres le grenaillage, qui est un traitement generalement utilise pour accroitre la duree de vie de pieces sollicitees cycliquement. Des tests de flexion trois points ondulee ont ete conduits sur cet alliage grenaille. Les eprouvettes ont ete usinees dans des toles fines, grenaillees et fatiguees sous charge d'amplitude constante (r=0,1). Les contraintes residuelles ont ete principalement evaluees en surface et en profondeur par la diffraction des rayons x et les couches superficielles ont ete enlevees par polissage electrochimique. Les donnees brutes ont ete corrigees afin de tenir compte de la redistribution des contraintes durant le polissage. Par ailleurs, cet alliage contient quinze pour cent de precipites intermetalliques. Les contraintes evaluees par diffraction des rayons x sur la phase alpha de l'aluminium different des contraintes macroscopiques. Un programme base sur un modele micromecanique a ete developpe afin de corriger les donnees mesurees. Les profils de contraintes, obtenus par cette procedure sont compares a ceux obtenus par une autre methode experimentale mecanique et a ceux calcules par une modelisation theorique du grenaillage. Le grenaillage ameliore la duree de vie du materiau mais les contraintes residuelles superficielles sont partiellement relaxees durant les premiers cycles
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Bentachfine, Saâdia. "Etude en fatigue oligocyclique multiaxiale en phase et hors phase d'un alliage de magnésium-lithium". Metz, 1993. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1993/Bentachfine.Saadia.SMZ9314.pdf.
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Le but de cette thèse est d'étudie l'influence du déphasage sur la durée de vie en fatigue oligocyclique multiaxiale d'un alliage de magnésium-lithium. Dans un premier chapitre, on expose l'état de l'art en fatigue oligocyclique multiaxiale en phase et hors phase, ainsi que les différents critères de prévision de durée de vie existants dans ce domaine. Le troisième chapitre fera l'objet d'une discussion des résultats expérimentaux. Dans le quatrième chapitre, une étude métallographique du matériau utilisé, nous permettra d'éclaircir et donner ainsi une explication physique aux différents résultats rencontrés. Nous présenterons dans le chapitre cinq, plusieurs modélisations de la durée de vie du matériau en fatigue oligocyclique multiaxiale en phase et hors phase. Enfin, une conclusion générale fera le bilan de ce mémoireThe aim of this thesis is the study of the influence of the out-of-phase on life duration in multiaxial low cycle fatigue of a magnésium-lithium alloy. In first chapter, we expose the state of the art of multiaxial low cycle fatigue of a magnesium-lithium alloy and the different criterion of life prediction existing in this domain. The second chapter will be devoted to the experimental study. In the third chapter, we will present a discussion of experimental results. In the fourth chapter, a metallographic study of the material we have used, we clear us and then give us a physical explication to the differents results we met. We will present in the five chapter, lot models of fatigue prediction of material in multiaxial low cycle fatigue in phase and out-of-phase. At last, a general conclusion will make a balance sheet of this memory
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Aouali, Hamid. "Étude du comportement cyclique et la fatigue d'un alliage d'aluminium-lithium, le 80-90". Compiègne, 1990. http://www.theses.fr/1990COMPD238.
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Dans le domaine d’application de l'industrie de l'aéronautique, les alliages d 'aluminium-lithium offrent une combinaison intéressante de caractéristiques : un module spécifique élevé et un durcissement structural, leur permettant d'être plus compétitifs par rapport aux alliages légers conventionnels. Au total, cette étude rassemble une vaste caractérisation de l'alliage 8090 (Al - 1. 4 pds % Cu - 1. 0 Mg - 0. 08 Zr. - 2. 4 Li) , appuyée sur une comparaison avec un alliage binaire (Al-2% Li) utile à l'interprétation des mécanismes. Les lois de comportement à la fatigue sont établies et les propriétés particulières de l'alliage 8090 sont également expliquées notamment en fonction de trois températures de revenu.
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BENTACHFINE, SAADIA Pluvinage Guy. "ETUDE EN FATIGUE OLIGOCYCLIQUE MULTIAXIALE EN PHASE ET HORS PHASE D'UN ALLIAGE DE MAGNESIUM-LITHIUM /". [S.l.] : [s.n.], 1993. ftp://ftp.scd.univ-metz.fr/pub/Theses/1993/Bentachfine.Saadia.SMZ9314.pdf.
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Gounet-Lespinasse, Catherine. "Contribution à l'étude des mécanismes de fissuration sous sollicitations cycliques d'un alliage d'aluminium-lithium, le 8090". Compiègne, 1989. http://www.theses.fr/1989COMPD210.
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Le but de cette étude est de caractériser les propriétés de fissuration par fatigue d'un nouvel alliage d'aluminium-lithium, le 8090, et de les comparer avec celles d'alliages utilisés couramment dans l'industrie aéronautique. Trois états thermiques ont été étudiés avec des rapports de charges variant de R égal 0,01 Ar égal 0,7. L'influence de l'environnement est définie par des essais effectués dans divers milieux: air humide (60% RH), argon sec, eau distillée, solution saline (3,5% NaCl). Il apparaît que le 8090 offre un très bon comportement en fissuration par fatigue aussi bien dans l'air que dans l'eau salée. Soumis à une surcharge unique de traction, le 8090 présente un très grand nombre de cycles de retard. Les mécanismes de fissuration par fatigue actifs dans l'air sont analysés grâce à une étude fractographique détaillée et par une quantification de la rugosité des faciès de rupture. Les différences de comportement entre les trois états thermiques sont discutées en tenant compte des effets de microstructure de premier ordre, de fermeture, et d'environnement. Les faibles vitesses de propagation de l'état sous-vieilli dans le domaine du seuil de fissuration sont attribuées à un mécanisme de fissuration planaire. Pour les revenus les plus longs, ce mécanisme de fissuration planaire devient actif lorsque la déformation plastique en pointe de fissure est suffisante pour cisailler la phase S’. Les observations fractographiques, les mesures de rugosité, et le comportement en fissuration par fatigue apportent des éléments concordants.
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Guérin, Mathilde. "Comportement en corrosion d'un alliage d'aluminium cuivre-lithium AW2050 : couplage environnement, microstructure, et état de contrainte du matériau". Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/12281/1/guerin_partie_1_sur_2.pdf.
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Les problématiques de corrosion restent un sujet d'étude majeur lorsqu'il s'agit d'améliorer les propriétés des alliages pour structures aéronautiques. Dans le cadre de ce travail, le comportement en corrosion d'un alliage AW2050 de type Al-Cu-Li-X est étudié. L'analyse du couplage entre les microstructures caractéristiques de cet alliage et l'environnement agressif constitue un point central de l'étude. Le travail réalisé a permis d'identifier les facteurs de premier ordre parmi les paramètres métallurgiques et les paramètres chimiques relatifs à l'électrolyte sur le comportement en corrosion de l'alliage AW2050. Ensuite, l'impact de l'application de contraintes monotones et cycliques sur le comportement en corrosion du matériau a été étudié. Les principaux résultats montrent que la microstructure de l'alliage a un effet prépondérant sur le comportement en corrosion du matériau par rapport aux sollicitations mécaniques et aux conditions d'exposition au milieu agressif, même si des couplages existent entre microstructure, chargement mécanique et environnement. L'étude réalisée a permis de générer des avancées significatives dans la compréhension des mécanismes de corrosion, de corrosion sous contrainte et de fatigue corrosion de l'alliage AW2050.
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Tintillier, Rémy. "Résistance à la propagation aux faibles vitesses des fissures de fatigue dans un alliage aluminium-lithium type 8090". Poitiers, 1988. http://www.theses.fr/1988POIT2295.
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Caracterisation du comportement en fissuration par fatigue au voisinage du seuil de non-propagation dans l'alliage al-2,5li-1,4cu-0,7 mg dans trois conditions de revenu, soumis a des essais de seuil sous vide et a l'air pour des rapports de charge variant de 0,01 a 0,8. Comparaison avec des alliages d'aluminium conventionnels. Determination a partir de cette comparaison du mecanisme de glissement planaire induit par la precipitation durcissante delta ' dans l'alliage 8090. Analyse des differences de comportement en tenant compte des effets de fermeture et des interactions microstructure-environnement. Etude du comportement en fatigue des alliages binaires al-li de haute purete mono et polycristallins
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Tintillier, Rémy. "Résistance à la propagation aux faibles vitesses des fissures de fatigue dans un alliage aluminium-lithium type 8090". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37618913b.
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Contrepois, Quentin. "Texture et Anisotropie du comportement mécanique après laminage à chaud d'un alliage léger Aluminium Cuivre Lithium (2050) pour l'aéronautique". Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2010. http://tel.archives-ouvertes.fr/tel-00481142.
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Ce travail vise à comprendre l'évolution de la texture cristallographique et l'anisotropie du comportement mécanique après laminage à chaud et traitements thermiques d'un Al-Cu-Li 2050 et d'un Al-Zn-Mg-Cu 7050, et expliquer leurs différences. La texture est analysée par EBSD et RX après des essais de compression plane à chaud et après des laminages à chaud industriels. L'anisotropie est étudiée sur des tôles fortes industrielles après différents détensionnements et dans différents états microstructuraux par des essais de traction à 0°, 45° et 90° par rapport à DL. Enfin, nous comparons nos mesures à des résultats simulés par des modèles de plasticité cristalline (modèles de Taylor). Il est montré que, déformés dans des conditions identiques, les deux alliages développent les mêmes textures de laminage jusqu'à une déformation de 2.6. La présence de 1% massique de Li n'est à priori pas responsable d'une texture particulière. En revanche la température de laminage, qui est généralement plus élevée pour les Al-Cu-Li que pour les Al-Zn-Mg-Cu, a un impact important aux grandes déformations, notamment en favorisant la composante Laiton {110}<112>. L'anisotropie d'une tôle laminée de 2050 est pour une large part due à la texture cristallographique. Elle augmente quand un détensionnement est effectué par traction dans la direction DL et diminue quand il est effectué à 45°/DL. La précipitation durcissante, composée de T1 Al2CuLi en forme de plaquettes sur les plans {111}Al, augmente la résistance de la direction préalablement tractionnée mais n'est pas responsable dans nos conditions expérimentales d'une forte aggravation de l'anisotropie. Dans le 7050, l'anisotropie diminue entre l'état mûri naturellement et l'état sur-revenu. La précipitation de sur-revenu du 7050 atténue l'effet de la texture cristallographique sur l'anisotropie et rend, en comparaison, le 2050 d'autant plus anisotrope.
Libros sobre el tema "Lithium alliage"
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Aluminum-Lithium Alloys: Processing, Properties, and Applications. Elsevier Science & Technology, 2013.
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Grushko, Olga, Boris Ovsyannikov y Viktor Ovchinnokov. Aluminum-Lithium Alloys: Process Metallurgy, Physical Metallurgy, and Welding. Taylor & Francis Group, 2016.
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Aluminum-Lithium Alloys: Process Metallurgy, Physical Metallurgy, and Welding. Taylor & Francis Group, 2016.
Buscar texto completoCapítulos de libros sobre el tema "Lithium alliage"
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Post, Robert M. "Lithium and related mood stabilizers". En New Oxford Textbook of Psychiatry, 1198–208. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199696758.003.0154.
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Lithium is the paradigmatic mood stabilizer. It is effective in the acute and prophylactic treatment of both mania and, to a lesser magnitude, depression. These characteristics are generally paralleled by the widely accepted anticonvulsant mood stabilizers valproate, carbamazepine (Table 6.2.4.1), and potentially by the less well studied putative mood stabilizers oxcarbazepine, zonisamide, and the dihydropyridine L-type calcium channel blocker nimodipine. In contrast, lamotrigine has a profile of better antidepressant effects acutely and prophylactically than antimanic effects. Having grouped lithium, valproate, and carbamazepine together, it is important to note they have subtle differences in their therapeutic profiles and differential clinical predictors of response (Table 6.2.4.1). Response to one of these agents is not predictive of either a positive or negative response to the others. Thus, clinicians are left with only rough estimates and guesses about which drug may be preferentially effective in which patients. Only sequential clinical trials of agents either alone or in combination can verify responsivity in an individual patient. Individual response trumps FDA-approval. Given this clinical conundrum, it is advisable that patients, family members, clinicians, or others carefully rate patients on a longitudinal scale in order to most carefully assess responses and side effects. These are available from the Depression Bipolar Support Alliance (DBSA), the STEP-BD NIMH Network, or www.bipolarnetworknews.org and are highly recommended. The importance of careful longitudinal documentation of symptoms and side effects is highlighted by the increasing use of multiple drugs in combination. This is often required because patients may delay treatment-seeking until after many episodes, and very different patterns and frequencies of depressions, manias, mixed states, as well as multiple comorbidities may be present. Treating patients to the new accepted goal of remission of their mood and other anxillary symptoms usually requires use of several medications. If each component of the regimen is kept below an individual's side-effects threshold, judicious use of multiple agents can reduce rather than increase the overall side-effect burden. There is increasing evidence of reliable abnormalities of biochemistry, function, and anatomy in the brains of patients with bipolar disorder, and some of these are directly related to either duration of illness or number of episodes. Therefore, as treatment resistance to most therapeutic agents is related to number of prior episodes, and brain abnormalities may also increase as well, it behooves the patient to begin and sustain acute and long-term treatment as early as possible. Despite the above academic, personal, and public health recommendations, bipolar disorder often takes ten years or more to diagnose and, hence, treat properly. In fact, a younger age of onset is highly related to presence of a longer delay from illness onset to first treatment, and as well, to a poorer outcome assessed both retrospectively and prospectively. New data indicate that the brain growth factor BDNF (brain-derived neurotrophic factor) which is initially important to synaptogenesis and neural development, and later neuroplasticity and long-term memory in the adult is involved in all phases of bipolar disorder and its treatment. It appears to be: 1) both a genetic (the val-66-val allele of BDNF) and environmental (low BDNF from childhood adversity) risk factor; 2) episode-related (serum BDNF decreasing with each episode of depression or mania in proportion to symptom severity; 3) related to some substance abuse comorbidity (BDNF increases in the VTA with defeat stress and cocaine self-administration); and 4) related to treatment. Lithium, valproate, and carbamazepine increase BDNF and quetiapine and ziprasidone block the decreases in hippocampal BDNF that occur with stress (as do antidepressants). A greater number of prior episodes is related to increased likelihood of: 1) a rapid cycling course; 2) more severe depressive symptoms; 3) more disability; 4) more cognitive dysfunction; and 5) even the incidence of late life dementia. Taken together, the new data suggest a new view not only of bipolar disorder, but its treatment. Adequate effective treatment may not only (a) prevent affective episodes (with their accompanying risk of morbidity, dysfunction, and even death by suicide or the increased medical mortality associated with depression), but may also (b) reverse or prevent some of the biological abnormalities associated with the illness from progressing. Thus, patients should be given timely information pertinent to their stage of illness and recovery that emphasizes not only the risk of treatments, but also their potential, figuratively and literally, life-saving benefits. Long-term treatment and education and targeted psychotherapies are critical to a good outcome. We next highlight several attributes of each mood stabilizer, but recognize that the choice of each agent itself is based on inadequate information from the literature, and sequencing of treatments and their combinations is currently more an art than an evidence-based science. We look forward to these informational and clinical trial deficits being reduced in the near future and the development of single nucleotide polymorphism (SNP) and other neurobiological predictors of individual clinical response to individual drugs. In the meantime, patients and clinicians must struggle with treatment choice based on: 1) the most appropriate targetting of the predominant symptom picture with the most likely effective agent (Table 6.2.4.1 and 6.2.4.2) the best side-effects profile for that patient (Table 6.2.4.2 and 6.2.4.3) using combinations of drugs with different therapeutic targets and mechanisms of action (Table 6.2.4.3 and 6.2.4.4) careful consideration of potential advantageous pharmacodynamic interactions and disadvantageous pharmacokinetic drug-drug interactions that need to be avoided or anticipated.
Actas de conferencias sobre el tema "Lithium alliage"
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Li, Marui, Chaoyu Dong, Xiangke Li, Xiaohong Dong, Yunfei Mu y Hongjie Jia. "A Sequential Network-model Alliance Module for Lithium-ion Battery Temperature Prediction". En 2022 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2022. http://dx.doi.org/10.1109/ecce50734.2022.9947649.
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Vamsi, Sai Vishnu, K. Mounika Nagabushanam, K. Vamshi Kumar, Somesh Vinayak Tewari y Tarkeshwar Mahto. "State of Health of Lithium-ion Batteries by Data-Driven Technique with Optimized Gaussian Process Regression". En 2023 International Conference on Artificial Intelligence and Applications (ICAIA) Alliance Technology Conference (ATCON-1). IEEE, 2023. http://dx.doi.org/10.1109/icaia57370.2023.10169188.
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