Advertisement

On the Alloying Reaction in Synthesis of NiTi Shape-Memory Alloy in Solid State

  • J. Abdullah
  • H. H. M. Zaki
Chapter

Abstract

Solid-state synthesis of NiTi alloy has gained much interest recently particularly in its porous form for its promising application in medical implant. In this work, powder synthesis by sintering of elemental Ni and Ti for forming equiatomic NiTi alloy was studied. It was found that the alloying reaction in solid state involves complex interaction between the participating elements, their thermodynamics, and the physical constraint of atomic diffusion. A simple model is proposed to explain the phenomenon. Phase characterization was carried out using X-ray diffraction, scanning electron microscope and energy dispersive X-ray. Differential scanning calorimetry was used to examine the transformation behavior of the NiTi alloy. Multiple phases on the Ni-Ti alloy systems were formed and low transformation heat was observed for the synthesized specimen. This paper identifies possible obstacles for forming single-phase NiTi and proposes further work.

Keywords

Differential Scanning Calorimetric Secondary Reaction Primary Reaction NiTi Alloy Alloy Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Authors would like to thank the Universiti Sains Malaysia and the Ministry of Higher Education via Experimental Research Grant Scheme (ERGS) # 203/PMEKANIK/6730014 for partly supporting this work. The input and experimental support from Professor Yinong Liu of the University of Western Australia is also acknowledged.

References

  1. Bansiddhi, A., Sargeant, T. D., Stupp, S. I., & Dunand, D. C. (2008). Porous NiTi for bone implants: A review. Acta Biomaterialia, 4, 773–782.PubMedCrossRefGoogle Scholar
  2. Bastin, G. F., & Rieck, G. D. (1974). Diffusion in the titanium-nickel system: II. calculations of chemical and intrinsic diffusion coefficients. Metallurgical Transition, 5, 1827–1831.CrossRefGoogle Scholar
  3. Jorma, R. L. T. (1999). Biocompatibility evaluation of nickel-titanium shape memory metal alloy. Oulu: University of Oulu.Google Scholar
  4. Li, B. Y., Rong, L. J., & Li, Y. Y. (1998). Porous NiTi alloy prepared from elemental powder sintering. Materials Research, 13, 2847–2851.CrossRefGoogle Scholar
  5. Michel, A., Alexandr, C., Michel, A. L., & Charles, H. R. (2002). A new porous titanium-nickel alloy: Part 1. Cytotoxicity and genotoxicity evaluation. Bio-Medical Materials and Engineering, 12, 225–237.Google Scholar
  6. Otsuka, K., & Wayman, C. M. (1998). Shape memory alloys. Cambridge: Cambridge University Press.Google Scholar
  7. Ryan, G., Pandit, A., & Apatsidis, D. P. (2006). Fabrication methods of porous metals for use in orthopaedic applications. Biomaterials, 27, 2651–2670.PubMedCrossRefGoogle Scholar
  8. Yi, H. C., & Moore, J. J. (1992). Combustion synthesis of TiNi intermetallic compound. Journal Materials Science, 27, 5067–5072.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.School of Mechanical EngineeringUniversiti Sains MalaysiaPulau PinangMalaysia

Personalised recommendations