ISSN 2594-5327
54º Congresso anual — Vol. 54 , num. 1 (1999)
Título
Autoria
DOI
Downloads
Resumo
In this work a study has been made of the structure and the mechanical properties of some polycrystalline compounds, across the RuAl - RuNiAl₂ pseudo-binary, prepared from high-purity elemental powders. A method of self-propagating high-temperature synthesis and induction melting produced porosity-free polycrystalline rods of RuAl binary alloys. However, the same method has failed to provide sound bulk samples of Ru-Ni-Al ternary alloys for a fixed ratio of powders size. All the alloys were characterised as being B2 single phase with the exception of the RuNiAl₂ alloy, where SEM backscattered images and x-ray diffraction confirmed the co-existence of two B2 with slightly different lattice parameters. The ALCHEMI method has been used and determined that the Ru sites are the most probable location for the Ni atoms. Finally, hot-microhardness tests were made as an alternative route for measuring the mechanical properties of the Ru-Ni-Al ternary alloys and for estimating the effect of solid-solution hardening caused by the substitution of Ni for Ru atoms.
In this work a study has been made of the structure and the mechanical properties of some polycrystalline compounds, across the RuAl - RuNiAl₂ pseudo-binary, prepared from high-purity elemental powders. A method of self-propagating high-temperature synthesis and induction melting produced porosity-free polycrystalline rods of RuAl binary alloys. However, the same method has failed to provide sound bulk samples of Ru-Ni-Al ternary alloys for a fixed ratio of powders size. All the alloys were characterised as being B2 single phase with the exception of the RuNiAl₂ alloy, where SEM backscattered images and x-ray diffraction confirmed the co-existence of two B2 with slightly different lattice parameters. The ALCHEMI method has been used and determined that the Ru sites are the most probable location for the Ni atoms. Finally, hot-microhardness tests were made as an alternative route for measuring the mechanical properties of the Ru-Ni-Al ternary alloys and for estimating the effect of solid-solution hardening caused by the substitution of Ni for Ru atoms.
Palavras-chave
intermetallics, high-temperature alloys, ruthenium alloys
intermetallics, high-temperature alloys, ruthenium alloys
Como citar
Sabariz, Antonio Luiz Ribeiro; Rodrigues, Paulo César Matos; Taylor, Glyn.
Preparation, Structure and Mechanical Properties of (Ru, Ni)Al Alloys,
p. 1296-1304.
In: 54º Congresso anual,
São Paulo, Brasil,
1999.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C00662
