Intermetallic Compound
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Microstructure and Fracture of 50Mo-50Re Vacuum Brazed with Fe-Si-B Filler Metal
Microstructural evolution, interfacial reaction and fracture during vacuum brazing of 50Mo-50Re alloys using amorphous alloy Fe-5.6Si-2.6B(wt%) were investigated. A binary intermetallic compound, σ(Mo2Re3) formed as parallel contiguous layers in the diffusion zone. In addition, Fe from the braze alloy, in combination with dissolved Mo from the substrate, fo
Mat. Res.. Publicado em: 30/09/2019
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2. Evaluación de caminos de difusión de Al en UAl4
ABSTRACT Once the stable structure of point defects and concentrations of defects in thermal equilibrium were obtained for each composition of Al of the compound UAl4, we identified, in this work, the more likely mechanisms for Al mobility in UAl4, and we analyzed transition states in the diffusion of Al in UAl4 by the Nudged Elastic Band (NEB) method implem
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Analysis of Ball Soldering Parameters on the Properties of a BGA Packaged Semiconductor
Integrated circuits have several applications, including medicine and the aerospace industry, where reliability is essential. Packaging is an important step in the manufacturing of integrated circuits, and ball soldering is one of the most critical process, especially in assembling and interconnecting integrated circuits. The solder joint formed during the b
Mat. Res.. Publicado em: 01/02/2018
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4. Sigma Phase in Superduplex Stainless Steel: Formation, Kinetics and Microstructural Path
The superduplex stainless steels (SDSS) are widely used in chemical, oil and gas industries, to pipelines and storage material facilities. In welding process or working in temperature elevated, secondary phases may appear in the form of precipitates, as the sigma phase (σ) which is an intermetallic compound. This compound is harmful to the properties of ste
Mat. Res.. Publicado em: 09/01/2017
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5. Effect of Rapid Solidification and Addition of Cu3P on the Mechanical Properties of Hypereutectic Al-Si Alloys
The combined processes; rapid solidification, addition of Cu3P compound and heat treatments to improve the mechanical properties of the hypereutectic Al-13Si, Al-20Si and Al-20Si-1.5Fe-0.7Mn alloys (in wt. %) was studied. Optical microscopy and scanning electron microscopy were used to characterize the microstructures. The mechanical properties were evaluate
Mat. Res.. Publicado em: 22/08/2016
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6. Influence of Gd, Nd and Ce Additions on Microstructures and Mechanical Properties of Ultra-light Dual Phase Mg-9Li-0.4Zr Alloys
Effects of various rare-earth elements (RE: Gd, Nd and Ce) additions on microstructures and mechanical properties of ultra-light dual phase Mg-9Li-0.4Zr alloy were investigated. The results indicated that Mg-9Li-5RE-0.4Zr alloys exhibited α-Mg, β-Li and RE-containing intermetallic compound structures. 5 wt.% Gd, Nd and Ce additions enhanced the strength pr
Mat. Res.. Publicado em: 12/04/2016
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7. Obtenção do TiFe por moagem com alta energia / Obtention of TiFe by high-energy ball milling
Neste trabalho, investigou-se a elaboração mecânica do composto intermetálico TiFe por moagem de bolas com alta energia. Uma forte aderência do material moído, particularmente nas paredes do recipiente de moagem, foi o principal problema verificado com tempos de moagem superiores a 1 hora (moinho agitador). Tentativas para resolver este problema foram
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
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8. Effect of milling variables and high-energy mills on the NiAl intermetalic compound synthesis. / Efeito das variáveis de moagem e dos moinhos de alta energia sobre a síntese do composto intermetálico NiAl.
A study on the effect of milling variables and high-energy mills on the NiAl intermetallic compound synthesis was performed. The effect of ball-to-powder ratio, Ni particle initial size, the use of process control agent and milling media size on NiAl synthesis in a Spex mill was evaluated using a factorial design. It was shown that ball-to-powder ratio plays
Publicado em: 2010
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9. Doping phase diagrams of the heavy fermions Ce2MIn8 (M = Rh, IR) / Efeitos da substituição quimica nos diagramas de fases dos fermions pesados Ce2MIn8 (M = Rh e Ir)
This thesis describes the investigation of the physical properties of the (Cd, Sn, Ga)-doped Ce2MIn8 (M = Rh, Ir) intermetallic compounds. Temperature dependent magnetic susceptibility, heat capacity and electrical resistivity measurements were performed to characterize the macroscopic properties of the synthesized compounds. X-ray powder diffraction were us
Publicado em: 2009
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10. Estudo do composto intermetálico GdAl2 via ressonância magnética nuclear em campo magnético externo nulo / Zero-field NMR study of intermetallic compound GdAl2
Recentemente, o Laboratório de Espectroscopia de Alta Resolução por RMN (LEAR), do Instituto de Física de São Carlos - USP, decidiu iniciar pesquisa na área de materiais magnéticos sem a aplicação de campo magnético externo. Por esta razão, montou-se um espectrômetro de RMN em campo zero (RMNz), tendo como componente principal um console de banda
Publicado em: 2009
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11. Estudo de rotas alternativas para a fabricação de ímãs compósitos à base de Sm2Fe17N3
This monograph thesis concerns the study of alternative processing routes regarding the fabrication of permanent magnets based on the Sm2Fe17N3 intermetallic compound. The study is mainly based on the compound synthesis in powder form and its subsequently shaping to get the final magnet body. Instead of the traditional induction melting of metallic samarium
Publicado em: 2008
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12. Influência de agentes controladores de processo na síntese por combustão mecanicamente ativada do NbAL3 / INFLUENCE OF PROCESS CONTROL AGENTS ON THE MECHANICALLY ACTIVATED COMBUSTION SYNTHESIS OF NbAl3
In this work, the influence of some process control agents (stearic acid, ethanol, methanol and cyclohexane) in the mechanical activation of powder mixtures of 25% at. niobium and 75% at. aluminum (stoichiometry of the intermetallic compound NbAl3) followed by combustion synthesis reaction, was investigated. The process control agents (PCA) were added to the
Publicado em: 2008