Effect of Zirconium Oxide Reinforcement on Microstructural, Electrochemical, and Mechanical Properties of TiNi Alloy Produced via Powder Metallurgy Route
Autor: | M. Imran Khan, S. Abbas Raza, M. Ramzan Abdul Karim, S. Zameer Abbas, Rashid Ali, M. Umair Naseer, Mairaj Ahmad |
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Rok vydání: | 2021 |
Předmět: |
010302 applied physics
Zirconium Materials science Mechanical Engineering Alloy Metallurgy chemistry.chemical_element Sintering 02 engineering and technology engineering.material Nanoindentation 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Corrosion Dielectric spectroscopy chemistry Mechanics of Materials Powder metallurgy 0103 physical sciences engineering General Materials Science 0210 nano-technology Ball mill |
Zdroj: | Journal of Engineering Materials and Technology. 143 |
ISSN: | 1528-8889 0094-4289 |
DOI: | 10.1115/1.4051308 |
Popis: | Equiatomic TiNi alloy composites, reinforced with 0, 5, 10, and 15 vol% ZrO2, were synthesized using conventional sintering approach. Equiatomic TiNi pre-alloyed powder and ZrO2 powder were mixed in planetary ball mill for 6 h followed by cold compaction and pressure-less sintering, respectively. The sintered density was found to vary inversely with the addition of ZrO2 content. The X-ray diffraction (XRD) spectra have shown the formation of multiple-phases which were resulted from the decomposition of the B19′ and B2 phases of the equiatomic TiNi alloy due to the addition of ZrO2 and higher diffusion rate of Ni than that of Ti in the alloy composite. An increase in hardness was noted due to the addition of ZrO2, measured by micro and nanoindentation techniques. Potentiodynamic polarization scan revealed a 10% decrease in the corrosion rate of the composite containing 10 vol% ZrO2. Electrochemical impedance spectroscopy (EIS) results indicated an increase in passive layer resistance (Rcoat) due to the increase in charge transfer resistance (Rct) caused by the reduced leaching of ions from the surface. |
Databáze: | OpenAIRE |
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