論文 - 詳細
| RRC ID | 71761 |
|---|---|
| 著者 | Nnamchi PS, Obayi CS, Todd I, Rainforth MW. |
| タイトル | Mechanical and electrochemical characterisation of new Ti-Mo-Nb-Zr alloys for biomedical applications. |
| ジャーナル | J Mech Behav Biomed Mater |
| Abstract |
The development and characterisation of new metallic biomaterials that contain non-toxic and non-allergic elements but possess low elastic modulus and low biodegradation rates, has become a topic of serious investigation in orthopaedic implant application. The lowering of elastic modulus and improving of corrosion resistance can be achieved by specific chemical alloying and super-elasticity effects, associated with a stress-induced phase transformation from the BCC metastable beta phase to the orthorhombic α″ martensite. Using this framework, this paper focuses on the effect of Nb and/or Zr micro-additions on the elastic modulus/yield strength balance and discusses microstructure, and the mechanical and electrochemical behaviour of four new β-Ti-8Mo-xNb-xZr (x=2-5) alloys, using tensile tests, X-ray diffraction, SEM characterisation, ultrasound technique and potentiodynamic polarisation methods. The results reveal that the alloys exhibit a pronounced microstructural sensitivity response, with alloying elements and excellent agreement between β-stability and high mechanical strength, with increasing Nb additions. Although all the alloys possess excellent corrosion resistance and low Young׳s modulus, Ti-8Mo-4Nb-2Zr alloy, which consists of β+α'' phases, exhibits a low Young modulus of 35GPa, which is lower than those of the commercial alloys already used in biomedical implantation. The significant corrosion resistance, nontoxicity and better mechanical compatibility are properties pertinent to preventing stress shielding and bone resorption in orthopaedic implant applications. |
| 巻・号 | 60 |
| ページ | 68-77 |
| 公開日 | 2016-7-1 |
| DOI | 10.1016/j.jmbbm.2015.12.023 |
| PII | S1751-6161(15)00497-X |
| PMID | 26773649 |
| MeSH | Alloys / chemistry* Biocompatible Materials / chemistry* Corrosion Elastic Modulus Materials Testing Molybdenum Niobium Prostheses and Implants Titanium Zirconium |
| IF | 3.372 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 各媒体での言及数の合計 | 0 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| ヒト・動物細胞 | MC3T3-E1(RCB1126) |