Ternary Alloys
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. 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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14. Isothermal section of the Ti-Si-B system at 1250 ° C in the Ti-TiSi2-TiB2 region
A partial isothermal section (Ti-TiSi2-TiB2 region) of the ternary Ti-Si-B system at 1250 ° C was determined from heat-treated alloys prepared via arc melting. Microstructural characterization has been carried out through scanning electron microscopy (SEM), x-ray diffraction (xRD) and wavelength dispersive spectrometry (WDS). The results have shown the stab
Mat. Res.. Publicado em: 22/10/2013
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15. Análise da evolução microestrutural e da formação de macrossegregação e microporosidade na solidificação unidirecional transitória de ligas ternárias Al-Cu-Si / Analysis of microestrutural evolution and formation of macrosegregation and microparasity in the unidirectional transient solidification of ternary Al-Cu-Si alloys
As ligas fundidas de alumínio vêm desempenhando um papel importante no crescimento da indústria metal-mecânica. Hoje, essas ligas são produzidas em vários sistemas e dezenas de composições. Destacamos as ligas do sistema ternário Al-Cu-Si que apresentam excelente fluidez, alta resistência mecânica e baixo peso, o que as tornam uma escolha adequada
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/02/2012
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16. On Ti-18Si-6B and Ti-7.5Si-22.5B powder alloys prepared by high-energy ball milling and sintering
Recently, a new ternary phase was discovered in the Ti-Si-B system, located near the Ti6Si2B composition. The present study concerns the preparation of titanium alloys that contain such phase mixed with α-titanium and other intermetallic phases. High-purity powders were initially processed in a planetary ball-mill under argon atmosphere with Ti-18Si-6B and
Mat. Res.. Publicado em: 09/10/2012
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17. Estudo experimental do sistema Ta-Ge e da região rica em Ta do ternário Ta-Ge-B / Experimental Investigation of the Ta-Ge System and of the Ta Rich Region of Ta-Ge-B Ternary System.
Jet engines are important and complex engineering devices, whose efficiency and performance are directly related to the operating temperature of the combustion chamber, the higher the gas temperature in this region, the greater the overall efficiency of the process, resulting in economy of fuel and more efficiency. Ni-based superalloys are currently used in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/05/2011
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18. Corrosion resistance improvement of titanium base alloys
The corrosion resistance of the new Ti-6Al-4V-1Zr alloy in comparison with ternary Ti-6Al-4V alloy in Ringer-Brown solution and artificial Carter-Brugirard saliva of different pH values was studied. In Ringer-Brown solution, the new alloy presented an improvement of all electrochemical parameters due to the alloying with Zr; also, impedance spectra revealed
Química Nova. Publicado em: 2010
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19. Microsegregation in Fe-C-P ternary alloys using a phase-field model
A phase-field model is proposed for the simulation of microstructure and solute concentration during the solidification process of Fe-C-P ternary alloys. A relation between material properties and model parameters is presented. Two-dimensional computation results exhibit dendrites in Fe-C-P alloys for different phosphorus concentrations. Alterations in the p
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-09
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20. Caracterización de aleaciones Cu-Zn-Al: estabilidad térmica de las fases y decincación
As a first stage in the study of chlorination of ternary alloys, characterization studies involving thermodynamics and temperature effects are necessary to know the changes in the structure, which might arise from the heating that precedes the chlorination reactions. The initial beta-alloy was quenched from 900ºC. After different non-isothermal treatments m
Matéria (Rio de Janeiro). Publicado em: 2007
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21. Photoluminescence properties of Te doped AlGaAsSb alloys
A detailed study of the photoluminescence properties in undoped and Te-doped AlGaAsSb alloys lattice matched to InP is presented. Photoluminescent temperature and excitation intensity dependences are employed to discuss the origin of the dominant transition and the influence of the presence of Al and Te on the fluctuation of the electrostatic potential in th
Brazilian Journal of Physics. Publicado em: 2005-12
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22. Propriedades vibracionais de nitretos do grupo III e de suas ligas / Vibrational properties of group-III nitrides and their alloys
Os nitretos do grupo III (BN, AIN,Gan e InN) e suas ligas ternárias Al-GaN e InGaN proporcionam, recentemente, um extraordinário avanço na fabricação de dispositivos opto-eletrônicos operando na região do espectro correspondente ao verde-azul-UV e na produção de dispositivos eletrônicos de alta frequência, alta temperatura e alta potência. Estes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2004
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23. Phase separation and ordering in group-III nitride alloys
The electronic, structural, and thermodynamic properties of cubic (zinc blende) group-III nitride ternary In xGa1-xN and quaternary Al xIn yGa1-x-yN alloys are investigated by combining first-principles total energy calculations and cluster expansion methods. External biaxial strain on the alloys are taken into account in the calculations. While alloy fluctu
Brazilian Journal of Physics. Publicado em: 2004-06
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24. Propriedades estruturais, eletrônicas e termodinâmicas dos nitretos do grupo-III e de suas ligas / Structural, electronic and thermodynamic properties of group-III nitrides and their alloys.
Neste trabalho foram efetuados estudos importantes e pioneiros sobre as propriedades estruturais, eletrônicas e termodinâmicas dos nitretos e de suas ligas, através de dois métodos de primeiros princípios distintos, o FLAPW (\"Full-potential Linear Augmented Plane Wave\") e o pseudopotencial combinado com a aproximação quasequímica generalizada. Na p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/05/2001