Investigation of the Synthesizing Effects of Prealloyed NiTi + Pure Al(2, 4, 6, 8 wt.%) Powders by MA and Sintering
Sinan AKSÖZ1, Gülizar ALTINIŞIK2, Ekrem Emre ELVERİŞLİ2, Bülent BOSTAN2
1. Department of Metallurgical and Materials Engineering, Technology Faculty, Pamukkale University, Kınıklı Campus, Turkey.
2. Department of Metallurgical and Materials Engineering, Technology Faculty, Gazi University, Beşevler, Turkey.
Abstract: Prealloyed NiTi and high purity Al powders were used in the study. Prealloyed NiTi powders and Al powders were mechanically synthesized for 210 minutes by mechanical alloying (MA) method. Respectively 2, 4, 6 and 8 % ratios of Al powders were synthesized in NiTi alloy powders via milling. Alloyed powders were pressed at 200°C and sintered at 1100°C for 2h. In determining and characterizing the properties of powders and sintered parts; SEM, Optical Microscope, XRD and DSC analyzes were applied, respectively. Optical Microscope images show the fine grains obtained in NiTi+Al 8% alloys. In XRD analysis B2, B19, AlNi, Al3Ni and AlNi2Ti peaks were seen. The XRD results show the needed 2θ peaks could be achieved with sintering of NiTi+Al alloy system. The results show that the obtained parts will be used in implant technolgy with their fine and pure structures.
Keywords: NiTi+Al alloys, Mechanical synthesis, AlNi2Ti/Al3Ni/AlNi phases.
Pages: 85 – 92 | Full PDF Paper