versión On-line ISSN 0718-0764
ARAGON, José A. Formation of Zn-21.6%Al-2.0%Cu Alloy by Powder Metallurgy: Effect of the Lubricant in Briquettes. Inf. tecnol. [online]. 2008, vol.19, n.6, pp. 3-8. ISSN 0718-0764. http://dx.doi.org/10.4067/S0718-07642008000600002.
In this work the elaboration of Zn-21.6%Al-2.0%Cu alloy (mass percentages), prepared by a method of powder metallurgy and the effect of different lubricants used in the briquettes were studied. Mixtures of powders of Zn, Al and Cu with acetone, wax and stearic acid as lubricants were prepared and compacted up to a pressure of 77.4 Mpa. The briquettes were sintered under argon flux and at intervals of 15 and 45 minutes at 357° C. The materials were structurally characterized by optical microscopy, micro-hardness Vickers, hardness Rockwell F tests and X-rays diffraction. The stearic acid and wax work similar to lubricants and acetone slows down the formation of the alloy, but it causes greater hardnesses after sintering. The alloy is completely formed when the lubricant is wax and the sintering time is more than 45 minutes. The velocity of formation of the alloy depends on the type of lubricant in the briquettes.
Palabras llave : powder metallurgy; Zn-21.6%Al-2.0%Cu alloy; structural characterization; sintering.