Guha Ashim (14 results)

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Paperback. Condition: Brand New. 68 pages. French language. 8.66x5.91x0.16 inches. In Stock.

Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - El presente trabajo tiene como objetivo el desarrollo de un compuesto de alúmina endurecido con metales que se utilizará como material para herramientas de corte, principalmente mediante la adición de plata, y posteriormente la caracterización microestructural y la medición de propiedades del compuesto desarrollado. En el trabajo se realizó una síntesis química mediante el método sol-gel para preparar polvo de alúmina a partir de nitrato de aluminio Al (NO3)3,9H2O. A continuación se mezcló bien AgNO3 con el polvo de ¿-Al2O3 preparado en solución acuosa, seguido de evaporación y calentamiento, para obtener 5 y 12 por ciento en volumen de Ag en la mezcla Al2O3-Ag. Para preparar los gránulos compuestos de Al2O3-Ag se siguió una ruta pulvimetalúrgica convencional. En primer lugar, se añadió PVA como aglutinante a la mezcla y, a continuación, se compactó el polvo en un conjunto de troquelado-perforación con orificio de forma circular a cierta presión uniaxial para las muestras en una prensa manual para preparar gránulos de disco de tamaño de 16 mm de diámetro y grosor de ~6mm y ~3mm . Los gránulos se secaron primero a 500°C durante 2 horas para quemar el PVA, después se sinterizaron previamente a 950°C durante 2 horas y finalmente se sinterizaron a 1600°C durante 2 horas como tiempo de remojo en un horno. …

Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Cel'ü nastoqschej raboty qwlqetsq razrabotka metallouprochnennogo alümooxidnogo kompozita, kotoryj budet ispol'zowat'sq w kachestwe materiala dlq rezhuschego instrumenta, w perwuü ochered' putem dobawleniq serebra, a takzhe mikrostrukturnaq harakteristika i izmerenie swojstw razrabotannogo kompozita. V rabote proweden himicheskij sintez s ispol'zowaniem zol'-gel' metoda dlq polucheniq poroshka glinozema iz nitrata alüminiq Al (NO3)3,9H2O. Zatem AgNO3 byl horosho peremeshan s podgotowlennym poroshkom ¿-Al2O3 w wodnom rastwore s posleduüschim wypariwaniem i nagrewaniem, chtoby poluchit' 5 i 12 ob#emnyh procentow Ag w smesi Al2O3-Ag. Dlq prigotowleniq kompozitnyh granul Al2O3-Ag byl ispol'zowan obychnyj poroshkowyj metallurgicheskij sposob. Snachala w smes' dobawlqli poliwinilowyj spirt w kachestwe swqzuüschego, a zatem poroshok uplotnqli w uzle shtampowki s otwerstiqmi krugloj formy pri opredelennom odnoosnom dawlenii dlq obrazcow w ruchnom presse dlq polucheniq diskowyh granul razmerom 16 mm w diametre i tolschinoj ~6 mm i ~3 mm. Granuly snachala sushili pri 500°C w techenie 2 chasow dlq wygoraniq PVA, zatem predwaritel'no spekali pri 950°C w techenie 2 chasow i, nakonec, spekali pri 1600°C w techenie 2 chasow w kachestwe wremeni wyderzhki w pechi.…

Condition: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Mondal SuprakashThe author currently working as an Assistant Professor in Mechanical Engineering Department of Mallabhum Institute of Technology (West Bengal, India). The author has published number of research papers in National and.…

Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Le présent travail vise à développer un composite d'alumine durci au métal qui sera utilisé comme matériau d'outil de coupe, principalement par l'ajout d'argent, puis par la caractérisation microstructurale et la mesure des propriétés du composite développé. Dans ce travail, une synthèse chimique utilisant la méthode sol-gel a été réalisée pour préparer la poudre d'alumine à partir du nitrate d'aluminium Al (NO3)3,9H2O. Ensuite, AgNO3 a été bien mélangé à la poudre -Al2O3 préparée dans une solution aqueuse, suivie d'une évaporation et d'un chauffage, pour obtenir 5 et 12 pour cent de volume d'Ag dans le mélange Al2O3-Ag. Une méthode conventionnelle de métallurgie des poudres a été suivie pour préparer les pastilles composites Al2O3-Ag. Le PVA a d'abord été ajouté comme liant au mélange, puis la poudre a été compactée dans un ensemble de poinçonnage à trous de forme circulaire à une certaine pression uni-axiale pour les échantillons dans une presse manuelle afin de préparer des pastilles de 16 mm de diamètre et d'une épaisseur de ~6 mm et ~3 mm. Les pastilles ont d'abord été séchées à 500°C pendant 2 heures pour brûler le PVA, puis pré-frittées à 950°C pendant 2 heures et enfin frittées à 1600°C pendant 2 heures en tant que temps de trempage dans un four.…

Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The present work is aimed to develop metal toughened alumina composite which will be used as a cutting tool material, primarily by addition of silver, then microstructural characterization and property measurement of the developed composite. In the work a chemical synthesis using the sol-gel method was carried-out to prepare alumina powder from aluminium nitrate Al (NO3)3,9H2O. Then AgNO3 was well mixed with the prepared -Al2O3 powder in aqueous solution followed by evaporation and heating, to get 5 and 12 volume percent of Ag in the Al2O3-Ag mixture. A conventional powder metallurgical route was followed to prepare Al2O3-Ag composite pellets. First PVA was added as binder with the mixture, and then the powder was compacted in a circular shaped hole die-punch assembly at certain uni-axial pressure for the samples in a hand press to prepare disc pellets of size 16 mm diameter and thickness of ~6mm and ~3mm . The pellets were first dried at 500°C for 2 hours to burn off the PVA, then pre- sintered at 950°C for 2 hours and finally sintered at 1600°C for 2 hours as soaking time in a furnace.…

Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Il presente lavoro ha lo scopo di sviluppare un composito di allumina temprato con metalli che sarà utilizzato come materiale per utensili da taglio, principalmente mediante l'aggiunta di argento, quindi la caratterizzazione microstrutturale e la misurazione delle proprietà del composito sviluppato. Nel lavoro è stata effettuata una sintesi chimica con il metodo sol-gel per preparare polvere di allumina dal nitrato di alluminio Al (NO3)3,9H2O. L'AgNO3 è stato poi ben miscelato con la polvere di ¿-Al2O3 preparata in soluzione acquosa, seguita da evaporazione e riscaldamento, per ottenere il 5 e il 12% in volume di Ag nella miscela Al2O3-Ag. Per preparare i pellet compositi Al2O3-Ag è stato seguito un percorso convenzionale di metallurgia delle polveri. In primo luogo è stato aggiunto il PVA come legante alla miscela, quindi la polvere è stata compattata in un gruppo di fustellatura a fori circolari a una certa pressione uniassiale per i campioni in una pressa manuale per preparare pellet a disco di dimensioni pari a 16 mm di diametro e spessore di ~6 mm e ~3 mm. I pellet sono stati prima essiccati a 500°C per 2 ore per bruciare il PVA, poi pre-sinterizzati a 950°C per 2 ore e infine sinterizzati a 1600°C per 2 ore come tempo di immersione in un forno.…