The properties of the double iron and tungsten carbide prepared by mechanical alloying technique (MA) from elemental powders are reported. The samples were milled for 1, 3, 5, 10, 15, 20, 25 and 30 h. The alloy progress for each milling time was evaluated by X-ray diffraction (XRD) and 57 Fe Mössbauer spectrometry. Once the alloy was consolidated two sorts of paramagnetic sites and a magnetic distribution were detected according to the Mössbauer fitting. The majority doublet could correspond to Fe 6 W 6 C ternary carbide as X-ray diffraction suggests, and the other could be Fe 3 W 3 C. The hyper fine parameters are reported. Vickers microhardness measurements of 30 h milled sample was conducted at room temperature with a load of 0.245 N for 20 s.
A 75 µm 6061 powder Aluminum Alloy (A.A) plus 5, 10 and 15 wt% CuAl 2 particles were prepared by mixing the powders in a small milling tumbler during 4 hours at 58 rpm. The samples were compacted at room temperature and at (210±5) °C by using a 38 mm diameter uniaxial floating die. A vacuumed chamber set with an Argon flux was adapted to sinter the samples at 555 °C, temperature that was determined by the exothermic peak of CuAl 2 and sinter time was experimentally determined in 1¾ h. The sintered samples were tailored to perform the tension and hardness tests. The 10wt% reinforced Alloy exhibits the best properties: the fluency stress is higher in approximately 130% as compared with the plain alloy. Also the maximum stress, the stress at 0.1% strain and the Young modules are better. The Tafel polarization curves show that corrosion resistance increases as the reinforcement particles increase.
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