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Itens para a visualização no momento 21-30 of 40
Estudo de aplicação de areia descartada de fundição como material alternativo para camada de cobertura de aterro de resíduos
(2014-05-29)
Advances in environmental issues related to materials science have been done due to the possibility of the use of alternative materials replacing conventional ones with similar characteristics. The Brazilian Foundry has ...
Amplificação da dureza de estruturas de multicamadas de filmes finos CrN/Si3N4
(2014-06-23)
Surface engineering has been searching to attend the industrial demand for tools, parts
and other components with larger lifecycles and higher wear resistance, by means of
protective coatings whose mechanical, physical-chemical ...
Obtenção e caracterização de compósitos preparados com poliestireno expandido reciclado e pó de madeira
(2014-05-29)
The present work aims to analyze the mechanical, thermal, dynamicalmechanical thermal properties and morphology of composites based on recycled polystyrene and wood flour. Composites with different types and levels of ...
Influência da geometria sobre o rendimento de bocais injetores de turbinas tesla no escoamento compressível supersônico
(2014-07-10)
Nozzles with convergent-divergent geometry are designed and manufactured for the establishment of supersonic flows. The main objective of this work is to verify the variation of isentropic efficiency depending on the ...
Estudo de plastificantes alternativos ao dioctilftalato (DOP) para um composto de poli (cloreto de vinila) (PVC)
(2014-06-23)
The physical characteristics of the PVC can be changed by adding different additives
during processing. A specific type of poly(vinyl chloride) (PVC), obtained by emulsion
method is widely used in the manufacture of shoes ...
Química de superfície e atrito em nanoescala do aço-carbono AISI 1045 nitretado e pós-oxidado a plasma
(2014-06-23)
This work presents a quantitative chemical interpretation of friction for the
most external layers of AISI 1045 steel previously nitrided and post-oxidized during 0, 1,
5, 10, 20 and 30 min. The characterization of ...
Fotossensibilizadores nanoestruturados por sistema camada por camada
(2014-06-05)
The search for materials that can be modified at molecular level has been the subject of several studies worldwide. Thus, the production techniques of thin films stand out due to the possibility of reducing costs and ...
Efeito do hidrogênio e mecanismos na pós-oxidação por plasma pulsado de ligas ferrosas nitretadas
(2014-06-03)
This work shows the hydrogen effect and the influence of processing temperature and time in the post-oxidation treatment by pulsed plasma on nitrided AISI 1045 ferrous alloy. The crystalline structure was analyzed by X-ray ...
Modificação da superfície de poliestireno por imersão em plasma para inibição da staphylococcus epidermidis.
(2014-06-05)
Polymeric materials, such as polystyrene, are widely used as biomaterials, both in the pharmaceutical industry and biomedical areas. With the use of more specialized biomaterials, it is reported a significant increase of ...