Aluminum powder metallurgy processing

Effect of extrusion and particle volume fraction on the mechanical properties of SiC reinforced Al–Cu alloy composites

“…In general, oxide layer will be formed on the surfaces of the Al-Cu powders during the fabrication process. The oxide layer can substantially degrade the solid-phase-sintering ability through inhibiting the elements diffusion (note that it is solidphase-sintering at 570 • C in the present study), a phenomenon being also observed previously [21,22]. The density evolution of the composites before extrusion indicates that the density of the composites after sintering is relatively high and close to the theoretical density, as shown in Table 2.…”

Pecularities of Gas Analysis in Al and Mg Powders

“…A good correlation between the size characteristics of the powder and oxide concentration is seen from the measured data (Table 4). There are several authors reporting different oxygen content on different chemistries of aluminium powders [2,6,7]. Low oxygen content in our samples is related to the processing treatment in the powder production route.…”

“…Such a method is robust for some types of chemical analyses, but they are lacking the acceptable uncertainty for these gas measurements [1]. Surface layers profiling methods are also used in oxygen and nitrogen determination, but these methods are used only for surface layers [2]. The inert gas fusion analysis (hot extraction method) is a procedure used for the direct oxygen and nitrogen determination.…”

“…[3]. The oxide volume is always connected with the processing route, powder surface area, humidity residuals (residuals of chemical processes with humidity) on the surface, and storage conditions of the powder [2].…”

Consolidation effects on tensile properties of an elemental Al matrix composite

“…For the baseline experiments, CIGA Al and Al 63 Cu 25 Fe 12 quasicrystal powders were utilized. The CIGA Al powder (99.7% purity) had been evaluated thoroughly in earlier work [22][23][24], to characterize its surface oxide properties. A patented GARS technique [21] was used to produce 99.99% pure Al and Al-Cu-Fe quasicrystal powders in our laboratory.…”