Ni Base Alloys
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Corrosion of galvanic pairs of dental alloys copper base with silver amalgams in artificial saliva
ABSTRACT Galvanic corrosion is a metal dissolution process that occurs when two metals of different electrochemical potential are immersed in an electrolyte causing electrical currents between the metals through the conducting medium. To restore lost or damaged teeth, different alloys are used, leaving the mouth exposed to electrical currents that circulate
Matéria (Rio J.). Publicado em: 20/05/2019
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2. Efecto de los parámetros de aplicación en recubrimientos de Ni-Cr-B-Fe-Si obtenidos por Flame Spray
ABSTRACT Surface damage of components in service is an issue of great industrial interest because of the costs associated to the replacement of certain critical components. There are several techniques to generate coatings, which provide increased resistance to a particular type of surface damage. In this way, it is achieved surface protection to different s
Matéria (Rio J.). Publicado em: 02/08/2018
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3. Impact of Alloy Composition and Thermal Stabilization on Martensitic Phase Transformation Structures in CuAlMn Shape Memory Alloys
Alloys of CuAlMn are known as cheap, high strength shape memory alloys with an excellent damping capacity within their austenitic-martensitic phase transformation, compared to alloy systems like NiTi, CuZnAl or MnCu. But CuAlMn alloys have disadvantage due to generation of voids by a high shrinkage which further increases the existing proneness to stress cra
Mat. Res.. Publicado em: 19/07/2018
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4. Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys
This work presents a consolidated view of the autocatalysis, thermal and entropic effects in martensitic transformation of polycrystalline Fe-31wt%Ni-0.02wt%C, which has been a standard material for the investigation of fundamental aspects of the martensite transformation. The present work is based on the description of classical microstructure descriptors o
Mat. Res.. Publicado em: 24/08/2017
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5. Development of nano-oxide dispersed 304L steels by mechanical milling and conventional sintering
In the present work an attempt has been made to synthesize 304L stainless steels alloy powders with nominal compositions 70.00Fe-19.00Cr-11.00Ni (alloy A), 69.00Fe-19.00Cr-11.00Ni- 1.0 Y2O3(alloy B), and 69.00Fe-19.00Cr-11.00Ni- 1.0 TiO2(alloy C), (all in wt.%) by mechanical milling and conventional sintering at 1150°C for 1.0 hour in argon atmosphere. Exte
Mat. Res.. Publicado em: 19/02/2016
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6. Fabricación de vidrios metálicos base cobre: evolución de las fases durante el procesode aleación mecánica
ABSTRACTIn this study, different, copper-based materials were fabricated under equal milling conditions (SPEX 8000D, argon atmosphere, stearic acid, BPR=10:1) and variable amounts of time, from 1 to 120 hours, in order to compare the microstructural changes during the process. The materials were: Pure copper; Cu-Ni alloys; Cu-Zr alloys; and Cu-Ni-Zr alloys.
Matéria (Rio J.). Publicado em: 2015-09
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7. The Role of cobalt and nickel intermetallic phases on the mechanical properties and microstructure evolution of Al-Zn-Mg-Cu alloys
In this study, the effects of cobalt and nickel additions on microstructure evolution and mechanical properties of Al-Zn-Mg-Cu alloys produced by chill casting process were investigated. Al-Zn-Mg-Cu aluminum alloys containing Ni and Co additives were homogenized at different heat treatment conditions, aged at 120ºC for 24 h, and retrogressed at 180ºC for 3
Mat. Res.. Publicado em: 2014-12
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8. Augmentation of wear-protective coatings for non-ferrous alloys by the addition of Cr and Ni elements
A number of Al-, Mg- and Ti-base alloys were preconditioned by oxidation via Plasma-electrolytic oxidation (PEO) followed by the addition of Cr and Ni elements in the coating pores by chemical precipitation and a final stage of mechanical treatment. The overall effect was a combination of hardness and resistance to wear. PEO voltage level was found to be a f
Mat. Res.. Publicado em: 2014-12
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9. Propriedades mecânicas das ligas Ti34Cu36Ni8Zr22 e (TiZr)80Co12Fe8 / Mechanical Properties of Ti34Cu36Ni8Zr22 and (TiZr)80Co12Fe8 Alloys
Ligas amorfas e nanocristalinas de grande volume vêm despertando grande interesse da comunidade científica. Ligas à base de titânio têm demonstrado potencial para formação de amorfo. O presente estudo objetivou avaliar as propriedades mecânicas, em temperatura ambiente, das ligas Ti34Cu36Ni8Zr22 e (TiZr)80Co12Fe8. Para tanto, foram realizados ensaios
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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10. Effects of chemical composition on the corrosion of dental alloys
O objetivo deste estudo foi determinar o efeito do ambiente bucal na corrosão de diferentes ligas odontológicas, utilizando métodos eletroquímicos. Os índices de corrosão foram obtidos por meio das curvas de corrente-potencial e impedância eletroquímica (EIS). O efeito de saliva artificial na corrosão de ligas odontológicas foi dependente da compos
Brazilian Dental Journal. Publicado em: 2012-04
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11. Estudo eletroquímico de ligas à base de cobalto-cromo e níquel-cromo / Electrochemical study of Co-Cr and Ni-Cr based alloys
Ligas metálicas não nobres são amplamente utilizadas em odontologia desde a segunda metade do século XX. Várias ligas metálicas para utilização em próteses sobre o implante dentário têm sido propostas nos últimos anos, visando uma melhor interação metal-cerâmica e maior resistência eletroquímica ao ambiente bucal. O objetivo deste trabalho �
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2011
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12. Novas ligas formadoras de fase amorfa do sistema Ni-Nb-Zr e seu comportamento mecânico / New amorphizable alloys from ni-nb-zr system and its mechanical behavior abstract
As ligas amorfizáveis de grande volume ou maciças à base de Ni apresentam boa combinação de propriedades, com altos valores de resistência mecânica e dureza, boa dutilidade e excelente resistência à corrosão. Essas ligas têm sido utilizadas em recentes aplicações tecnológicas, por exemplo, em sensores de pressão e em motores com microengrenage
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011