Sheelan R. Areef
Abstract
Master Samples NiTi (without additives) prepared using powder mixture of 55wt% Ni and 45 wt% Ti by; mixing in a ball mill for two hours, then compacted at 300,400, 500, 600, 700, and ...
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Master Samples NiTi (without additives) prepared using powder mixture of 55wt% Ni and 45 wt% Ti by; mixing in a ball mill for two hours, then compacted at 300,400, 500, 600, 700, and 800 Mpa, and then sintered at 950 oC for 9 hours under controlledatmosphere (argon). The same approach was made for the samples with Mo and Coadditions compacted at 800 Mpa. From the results, it was found that compaction pressurehas essential effect on; increasing hardness, decreases porosity percentage and corrosionrate. XRD test shows that the sintered samples are consisting of two phases martensiteand austenite at room temperatures (mean thermal NiTi shape memory alloy). The Resultsshown that the hardness property and corrosion rate increased with all weight percentageof additives Mo and Co, and decreases porosity percentage.
