Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties
<strong>Objective(s):</strong> NiTi is known as the most important material for manufacturing implants and medical devises duo to its shape memory and superelasticity properties, high energy damping, and high corrosion resistance.<br /> <strong>Methods:</strong> In this...
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| Format: | Article |
| Language: | English |
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Iranian Society of Nanomedicine
2017-12-01
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| Series: | Nanomedicine Research Journal |
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| Online Access: | http://www.nanomedicine-rj.com/article_30745_04972c486d97b38271c727a02a81652e.pdf |
| _version_ | 1818640696276418560 |
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| author | Mohammad Saleh Khalatbari Maryam Daneshpour |
| author_facet | Mohammad Saleh Khalatbari Maryam Daneshpour |
| author_sort | Mohammad Saleh Khalatbari |
| collection | DOAJ |
| description | <strong>Objective(s):</strong> NiTi is known as the most important material for manufacturing implants and medical devises duo to its shape memory and superelasticity properties, high energy damping, and high corrosion resistance.<br /> <strong>Methods:</strong> In this project, the possibility of producing nanostructured NiTi implant with high porosity was investigated. For reaching to the nanoscale, the mechanical alloying process was done on Ti and Ni powder as raw materials. Mechanical alloying process and the possibility of reaching nanostructure or amorphous phase was investigated. Space holder technique was used for reaching a porous structure. Sintering process was planned in a way to inhibit grain growth as much as possible. The samples sintered at two different sintering times. The effect of grain size and secondary phases on mechanical properties and phase transformation temperatures was studied.<br /> <strong>Results:</strong> The results showed that milling for 50 h at 300 rpm has led to amorphous phase and nanocrystallite with 50 nm diameter. Using space holder technique with the appropriate amount of spacer and choosing proper sintering time and temperature, the specimens with 70% porosity were produced. Furthermore, nanoscale grain size can lead to R phase transition. In fact, one of the effects of reaching to nanostructure is occurring R transformation due to high dislocation density and high grain boundaries surface. Nanostructured sample with 70% porosity was shown 5% superelasticity in the cyclic pressure test.<br /> <strong>Conclusions:</strong> As the results showed, one of the advantages of porous samples is their elastic modulus which is more similar to the bone than other metallic implants. |
| first_indexed | 2024-12-16T23:15:22Z |
| format | Article |
| id | doaj.art-0db45c0fa86148b5bf24392be6aeeb16 |
| institution | Directory Open Access Journal |
| issn | 2476-3489 2476-7123 |
| language | English |
| last_indexed | 2024-12-16T23:15:22Z |
| publishDate | 2017-12-01 |
| publisher | Iranian Society of Nanomedicine |
| record_format | Article |
| series | Nanomedicine Research Journal |
| spelling | doaj.art-0db45c0fa86148b5bf24392be6aeeb162022-12-21T22:12:19ZengIranian Society of NanomedicineNanomedicine Research Journal2476-34892476-71232017-12-012426727210.22034/nmrj.2017.04.00830745Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical PropertiesMohammad Saleh Khalatbari0Maryam Daneshpour1Department of Material Science and Engineering Sharif University of Technology Tehran, IranBiotechnology Department, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran<strong>Objective(s):</strong> NiTi is known as the most important material for manufacturing implants and medical devises duo to its shape memory and superelasticity properties, high energy damping, and high corrosion resistance.<br /> <strong>Methods:</strong> In this project, the possibility of producing nanostructured NiTi implant with high porosity was investigated. For reaching to the nanoscale, the mechanical alloying process was done on Ti and Ni powder as raw materials. Mechanical alloying process and the possibility of reaching nanostructure or amorphous phase was investigated. Space holder technique was used for reaching a porous structure. Sintering process was planned in a way to inhibit grain growth as much as possible. The samples sintered at two different sintering times. The effect of grain size and secondary phases on mechanical properties and phase transformation temperatures was studied.<br /> <strong>Results:</strong> The results showed that milling for 50 h at 300 rpm has led to amorphous phase and nanocrystallite with 50 nm diameter. Using space holder technique with the appropriate amount of spacer and choosing proper sintering time and temperature, the specimens with 70% porosity were produced. Furthermore, nanoscale grain size can lead to R phase transition. In fact, one of the effects of reaching to nanostructure is occurring R transformation due to high dislocation density and high grain boundaries surface. Nanostructured sample with 70% porosity was shown 5% superelasticity in the cyclic pressure test.<br /> <strong>Conclusions:</strong> As the results showed, one of the advantages of porous samples is their elastic modulus which is more similar to the bone than other metallic implants.http://www.nanomedicine-rj.com/article_30745_04972c486d97b38271c727a02a81652e.pdfnitinolsuperelasticitynanostructureporosity |
| spellingShingle | Mohammad Saleh Khalatbari Maryam Daneshpour Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties Nanomedicine Research Journal nitinol superelasticity nanostructure porosity |
| title | Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties |
| title_full | Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties |
| title_fullStr | Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties |
| title_full_unstemmed | Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties |
| title_short | Synthesis of Porous Nanostructure NiTi Implant and Measurement of Thermomechanical Properties |
| title_sort | synthesis of porous nanostructure niti implant and measurement of thermomechanical properties |
| topic | nitinol superelasticity nanostructure porosity |
| url | http://www.nanomedicine-rj.com/article_30745_04972c486d97b38271c727a02a81652e.pdf |
| work_keys_str_mv | AT mohammadsalehkhalatbari synthesisofporousnanostructurenitiimplantandmeasurementofthermomechanicalproperties AT maryamdaneshpour synthesisofporousnanostructurenitiimplantandmeasurementofthermomechanicalproperties |