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Now showing items 31-40 of 114
Avaliação de um critério de equivalência entre dados de tração a quente e fluência em aços
(Universidade Federal de São Carlos, 2007-05-28)
This work was conducted in four stages, the first to understand the phenomena that affect the 2.25Cr-1Mo steel hot tensile in different conditions, observing their behavior in a wide range of temperature and strain rates, ...
Desenvolvimento e caracterização de blendas e de compostos empregando polímeros biodegradáveis
(Universidade Federal de São Carlos, 2004-10-25)
This work presents theoretical information and experimental data on the behavior of biodegradable polymers and blends of biodegradable PHB polymer with copolyesters that are also biodegradable. Binary mixtures were made ...
Influência da incorporação de poli(ácido lático) - PLA, de pó de madeira e outros aditivos no comportamento físico-mecânico do poli(hidroxibutirato) - PHB.
(Universidade Federal de São Carlos, 2004-04-30)
Polymeric materials are used today in the most varied sectors and the deleterious effects of their application, particularly in the short-term, have led to increasing environmental concern. On the other hand, innovative ...
Estudo da transição de fase sólido-vapor e da eficiência de inibidores voláteis de corrosão quando incorporados em matrizes poliméricas
(Universidade Federal de São Carlos, 2005-08-05)
In this work it is proposed a potential barrier model between solid and vapor phases. As a consequence of this model it is developed a method to measure vapor pressure as low as 10-5 Pa. A thermodynamic system consisting ...
Estratégias para a síntese de compósitos moleculares derivados de poliuretanas
(Universidade Federal de São Carlos, 2009-02-20)
In this work, we investigated strategies to obtain polyurethanebased molecular composites containing metal oxide nanoparticles chemically attached to polyurethane polymeric chain. In Strategy 1, nanoparticles functionalized ...
Cristalização e sinterização de bio vidros do sistema Na2O-CaO-SiO2-P2O5
(Universidade Federal de São Carlos, 2001-03-30)
The objective of this work was to study crystallisation and sintering of Bio-glasses of Na2O CaO SiO2 P2O5 aiming at the improvement of the mechanical properties. In order to study the development of glass-ceramics in this ...
Influência da tensão residual no empenamento de peças aeronáuticas usinadas a partir de placas laminadas de ligas de aluminio da serie 7XXX
(Universidade Federal de São Carlos, 2002-02-19)
The fast growing of regional jets market has required from airframe manufacturers a prompt attending to market demands and the primary parts fabrication at a planned quality, quantity, and time at low costs. In order to ...
Processamento, caracterização e determinação do perfil de polarização do Poli(fluoreto de vinilideno)
(Universidade Federal de São Carlos, 2009-03-25)
This work characterized the ferroelectric polarization of the β-PVDF differentiating the individual contributions of the orientation and the crystalline phases in the remanent polarization of the PVDF. Those contributions ...
Conformação viscoplástica por rolos a frio e caracterização de substratos de alumina
(Universidade Federal de São Carlos, 2008-03-20)
Alumina ceramic substrates were conformed by viscoplastic conformation by cold roll pressing in a range of thickness between 100 and 200 µm, which one presents a great technology interesting for eletro-eletronic applications. ...
Caracterização de sistemas varistores a base de SnO2-MnO2.
(Universidade Federal de São Carlos, 2002-08-02)
This work focussed on the effect of addition of Nb2O5 on the electrical and microestructural properties of SnO2-MnO2 based ceramics. It was also studied the effect of heat-treatments in a oxygen-rich atmosphere in these ...