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Processamento reativo de nanocompósitos iPP-POSS
(2015-10-06)
The interaction modes of polyhedral oligomeric silsesquioxane (POSS) of closed cages with distinct functional groups were evaluated on isotactic polypropylene (iPP) nanostructuration via reactive processing. POSS were ...
Avaliação físico-química e mecânica de zircônia nitretada a plasma
(2015-05-11)
This paper presents the nitriding experimental investigation of partially yttria stabilized zirconia (3 mol%), in particular, plasma generated by radiofrequency (RF), using two distinct methods: i) plasma nitriding, by ...
Variação dimensional e microestrutural do aço AISI 4140 em peças usinadas por torneamento
(2015-10-07)
Dimensional deviation and surface quality are fundamental components for mechanical applications. The variables that influence these factors, the quantity of heat generated must be reduced in order to minimize their effects ...
Influência da combinação sílica/negro de fumo e das etapas de processamento no desempenho de bandas de rodagem de pneu de carga
(2015-08-18)
One of the major challenges in the rubber industry today is related to the relationship between durability, safety and economy for tire applications. Important progress on rolling resistence reduction with good wet grip ...
Crescimento de trinca de fadiga no aço SAE 4140 sujeito à vibração forçada
(2015-10-26)
Fatigue is a common cause of failures in mechanical components and metal structures when subjected to dynamic loads, caused by the growth of a crack, with the so-called Paris’ law the main model for crack propagation. This ...
Avaliação da dextrina como ligante das partículas de alumina para impressão 3D
(2016-02-19)
The development of technologies have provided the emergence of new forms for the processing of materials such as additive manufacturing techniques. For use of different materials in this type of processing, it is necessary ...
Estudo morfológico de uma blenda de I-PP e EPDM com argila
(2015-10-07)
In this work were investigated the morphological, themal and rheological properties of a isotactic polypropylene/ethylene-propylene-diene terpolymer rubber/nanoclay Cloisite 15A composite, prepared by mixed melt and submitted ...
Desenvolvimento e caracterização de compósitos de elastômero termoplástico de poliuretano (TPU) com argila
(2015-10-07)
In this study thermoplastic polyurethane (TPU) composites were obtained with different nanoclay contents (0, 1, 3 for all cases and 10 wt% in some cases). The nanoclay Cloisite 30B (C30B) was dispersed in the TPU matrix ...
Estrutura e propriedades elásticas das fases alpha e gama do ZrW2O8
(2015-10-06)
The crystalline structure and some elastic properties of the a and g phases of zirconium tungstate, ZrW2O8, were calculated according to Density Functional Theory using the B3LYP functional (DFT/B3LYP). The structure of ...