Fabrication of porous NiTi-shape memory alloy objects by partially hydrided titanium powder for biomedical applications

Sadrnezhaad, S. K ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2009.05.034
  3. Abstract:
  4. Porous NiTi-shape memory alloy (SMA) is a promising biomaterial with desirable mechanical property and appropriate biocompatibility for human implant manufacturing. In this research, porous NiTi-SMAs have been successfully produced by using thermohydrogen process (THP). This process has capability of production of homogenous structures, appropriate pore-size distributions and short sintering times. The THP-SMA samples produced in this research have a low Young's modulus (19.8 GPa) and a high tensile strength of 255 MPa. These properties are close to those of the natural bone and can meet the mechanical property demands of the hard-tissue implants for heavy load-bearing applications. The samples produced exhibit sufficient thermoelastic effect distinguished by a 1.2% mean recoverable strain. © 2009 Elsevier Ltd. All rights reserved
  5. Keywords:
  6. Biomedical applications ; Heavy loads ; High-tensile strength ; Homogenous structure ; Low young's modulus ; Natural bone ; Porous Ni-Ti ; Recoverable strain ; Shape memory alloy ; Thermoelastic effects ; Tissue implants ; Titanium powders ; Alloys ; Bearings (machine parts) ; Biocompatibility ; Biological materials ; Mechanical properties ; Pore size ; Sintering ; Titanium ; Titanium alloys
  7. Source: Materials and Design ; Volume 30, Issue 10 , 2009 , Pages 4483-4487 ; 02641275 (ISSN)
  8. URL: https://www.sciencedirect.com/science/article/pii/S0261306909002544