Vacuum Set Up
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Numerical Studies on Flow Behavior of Composite Propellant Slurry During Vacuum Casting
Abstract: Rockets are powered by composite solid propellant, which is a heterogeneous system consisting of solid oxidizer and metallic fuel dispersed in a polymeric fuel binder matrix. The slurry casting technique under vacuum/gravity condition is well-established for performing a different class of large sized case bonded rocket motors. During propellant ca
J. Aerosp. Technol. Manag.. Publicado em: 2012-06
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2. Análise in vitro da penetração do corante azul-de-metileno na dentina radicular humana variando-se o método de impregnação . / An in vitro analysis of the methylene blue dye penetration in human radicular dentin with different methods of impregnation
The purpose of this investigation was to evaluate how different contact methods of methylene blue dye solution 0, 5%, pH 7 for 24 hours, have influenced, in the reading of the demarcation leakage by tracer agent on the root dentin of human teeth. This study assesses 6 different methods: the dye agitation using the ultrasonic Gnatus, the agitation with the ul
Publicado em: 2006
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3. Desenvolvimento experimental de uma camara para medida de emissão de eletrons por catodos frios / Development of a vacuum set-up for the measurement of cold cathode field electron emission
Foi desenvolvida uma câmara de vácuo para estudo das propriedades elétricas de emissão de elétrons por catodos frios de vários materiais de interesse tecnológico, por exemplo, diamante dopado, filmes de carbono diamantífero e silício. Na parte experimental realizamos um sistema de alto vácuo (bomba mecânica mais a bomba difusora), um sistema de po
Publicado em: 2005
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4. Fabricação de multicamadas de Quantum Dots de PbTe por laser ablation
This thesis was dedicated to the fabrication of thin films, quantum dots and multilayer ofIV-VI semi conducting materiaIs by pulsed-Iaser deposition (PLD). In the first part we report on the construction of a "home made" facility for pulsed laser deposition. The basic experimental set-up fabricated for PLD consists of a vacuum chamber pumped to a base pressu
Publicado em: 2004
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5. Compressão de ruido quantico e efeitos transversos em osciladores parametricos oticos
We present in this work the project and construction of an Optical Parametric Oscillator ( OPO ) , showing the quantum behavior in the intensity correlation of signal and idler beams, generated from a 532 nm pump. We have also studied, in a second set-up, the quantum noise compression in the pump beam reflected from an OPO cavity, obtaining 38% of noise redu
Publicado em: 2002
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6. Estudo comparativo da resistência à compressão do cimento ósseo nacional e do importado, preparados manualmente e a vácuo. / A comparable study of the compression resistance of the national and international bone cement prepared manually and by vacuum.
The bone cement used for the fixation of the prosthetic components in the surgeries of joint replacement, more resistant to the compression than to the traction, has its mechanical properties altered by several factors among those the commercial formulation and preparation employee s method. It is the objective of this work to evaluate the mechanical propert
Publicado em: 2002
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7. Construção de um sistema experimental para desaceleração de átomos. / Construction of an experimental system for stopping atoms.
This work presents the development and test of an experimental set-up which allows to produce a very strong slow motion atomic beam. We discuss the calculation and construction of the solenoid to compensate the Doppler effect arising during the deceleration process, vacuum chambers, the oven which produces the atomic beam and the optical system used. We have
Publicado em: 1991