Fabrication and characterization of aluminum matrix composites containing different volume fractions of Ni3Al powder (5-40 Vol%) were investigated. Ni3Al powder was produced by mechanical alloying of elemental nickel and aluminum powder mixture. Al-Ni3Al composite parts were prepared using a powder metallurgy route involving two stages Al and Ni3Al powder mixtures were first compacted under 500...

1 Universidad Autonoma del Estado de Morelos, CIICAp, Av. Universidad 1001, 62209 Cuernavaca, Morelos, Mexico 2 Universidad Nacional Autonoma de Mexico, Instituto de Ciencias Fisicas, Av. Universidad s/n, 62210 Cuernavaca, Morelos, Mexico 3 Instituto de Investigaciones Electricas, Reforma 113, 62490 Cuernavaca, Morelos, Mexico 4 Corrosión y Protección (CyP), Buffon 46, 11590 Mexico City, DF, Me...

Occupied sites by dopants of Ag(O.lat%). Pd(Zat%) and Zr(OAat%) in the Ni3AI intermetallic compound are investigated by means of EXAFS analysis. It is found that Pd substitutes the Ni site and Zr substitutes the A1 site. These results are consistent with tthose of channeling enhanced microanalysis. Ag is also determined to substitute in the Ni site by EXAFS and this result supports that Ag addi...

The temperature dependencies of the c(f.c.c.)Ni/c-Ni3Al(L12) interfacial free energy for the {100}, {110}, and {111} interfaces are calculated using firstprinciples calculations, including both coherency strain energy and phonon vibrational entropy. Calculations performed including ferromagnetic effects predict that the {100}-type interface has the smallest free energy at different elevated tem...

The tribological properties of matrix and skeletal titanium carbonitride composites were studied in dry friction conditions air. Experiments on wetting the TiCN–Cr3C2 composite by nickel–chromium alloys copper using sessile drop method performed to choose composition ascertain whether samples could be produced impregnation porous skeleton. experiments showed that nickel its formed a low contact...

An X-ray diffraction technique was used to measure the residual stress in the surface of a specimen containing a coating of a NijAl intermetallic compound produced bythe SHS (Self-propagation High temperature Synthesis) method. The Ni3Al was using the coating material for spherical carbon cast iron substrate and austenite stainless steel substrate. Differences between the coefftcient of thermal...