Nbal3
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Nb-Al Binary System: Reevaluation of the Solubility Limits of the (Nb), Nb3Al, Nb2Al and NbAl3 Phases at High Temperatures
In this work a re-investigation of the solubility limits of the (Nb), Nb3Al, Nb2Al and the Nb-rich side of the NbAl3 phases on the Nb-Al system is presented. Alloys in the binary fields ((Nb)+Nb3Al, Nb3Al+Nb2Al and Nb2Al+NbAl3) were arc-melted, and then equilibrated at 1000, 1200 and 1400 ºC. The phases were confirmed via X-ray powder diffractometry, and th
Mat. Res.. Publicado em: 25/11/2019
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2. Mecanismos de ativação mecânica de misturas de Níobio e Alumínio para a síntese por reação do NbAl3 / Mechanical activation mechanisms of niobium and aluminium mixtures for the reaction synthesis of NbAl3
In this work, mechanical activation of mixtures of niobium and aluminum powders (75 at.% of Al) was carried out by high energy ball milling, in order to produce NbAl3 by combustion synthesis. The purpose was to investigate activation mechanisms present and the eventual preponderancy of one of them. Beside mixtures, aluminum and niobium powders were separatel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2008
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3. 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
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4. Síntese por combustão do NbAl3 e de ligas do sistema Nb-Ni-Al / Combustion synthesis of NbAl3 and of alloys in the system Nb-Ni-Al
O NbAl3 e algumas ligas intermetálicas do sistema Nb-Ni-AI foram sintetizadas por combustão a partir dos pós de seus elementos constituintes. O efeito de variáveis de processo, como o tamanho de partícula dos pós, a composição química, a pressão de compactação, o tratamento de desgaseificação e a taxa de aquecimento, foram investigados na sínt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/05/1998
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5. Obtenção e caracterização de compostos do tipo in situ no sistema A1 Nb
This work analyses the feasibility of in situ composites production in the AI-Nb system, containing AI- fhase as matrix and intermetallic NbAl3 as reinforcement; and characterizes 6, 12 and 18%vol NbAl3 produced composites in relation to their mechanical properties (hardness; yield strength, ultimate tensile strength, strain; wear), thermal expansion and den
Publicado em: 1994