Abstract
Here, we propose carbon-based nanostructured coatings for nickel-titanium (NiTi) shape memory alloys (SMAs) for biomedical applications. NiTi SMAs are well-known biomedical materials; however, the elution of toxic Ni ions into the body has prevented SMAs from expanding their applications, particularly in the complete implantation of SMAs for human artificial muscles. One possibility for the suppression of leaching ions is to create a barrier coating, for which diamond-like carbon (DLC) may be a candidate. Due to the strong internal stress derived from the mismatch of the thermal expansion coefficient, however, the adhesive strength of DLCs is very low. In this study, we focused on the incorporation of tungsten into a DLC in order to reduce the internal stress of the coating. First, we present the definition of appropriate fabrication conditions. Uniaxial tensile tests were then performed, and we evaluated the adhesive strength of the coatings. We then determined the conditions that support the fabrication of a coating with the strongest adhesive strength. Thereafter, we deposited the coating onto the SMA with shape memory effects and conducted self-bending tests. We observed that the cracks initiated parallel to the longer direction of the specimens, most likely a result of a boundary slip between the parent phases of the SMA. The removed fraction area of the coating was estimated at less than 1 % after 105 cycles, indicating the potential usage of tungsten-containing DLC coatings for biomedical applications.
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References
Kahn, H., Huff, M.A., Heuer, A.H.: The TiNi shape-memory alloy and its applications for MEMS. Journal of Micromechanics and Microengineering 8, 213–221 (1998)
Li, D.Y.: Exploration of TiNi shape memory alloy for potential application in a new area: Tribological engineering. Smart Materials and Structures 9(5), 717–726 (2000)
Van Humbeeck, J.: Non-medical applications of shape memory alloys. Materials Science and Engineering A 273-275, 134–148 (1999)
Fu, Y., Du, H., Huang, W., Zhang, S., Hu, M.: TiNi-based thin films in MEMS applications: A review. Sensors and Actuators, A: Physical 112(2-3), 395–408 (2004)
Filip, P., Lausmaa, J., Musialek, J., Mazanec, K.: Structure and surface of TiNi human implants. Biomaterials 22(15), 2131–2138 (2001)
Luo, Y., Okuyama, T., Takagi, T., Kamiyama, T., Nishi, K., Yambe, T.: Thermal control of shape memory alloy artificial anal sphincters for complete implantation. Smart Materials and Structures 14(15), 29–35 (2005)
Robertson, J.: Diamond-like amorphous carbon. Material Science and Engineering R 37, 129–281 (2002)
Shirakura, A., Nakaya, M., Koga, Y., Kodama, H., Hasebe, T., Suzuki, T.: Diamond-like carbon films for pet bottles and medical applications. Thin Solid Films 494(1-2), 84–91 (2006)
Abbas, G.A., Roy, S.S., Papakonstantinou, P., McLaughlin, J.A.: Structural investigation and gas barrier performance of diamond-like carbon based films on polymer substrates. Carbon 43(2), 303–309 (2005)
Kobayashi, S., Ohgoe, Y., Ozeki, K., Sato, K., Sumiya, T., Hirakuri, K., Aoki, H.: Diamond-like carbon coatings on orthodontic archwires. Diamond and Related Materials 14, 1094–1097 (2004)
Wei, C., Yen, J.Y.: Effect of film thickness and interlayer on the adhesion strength of diamond like carbon films on different substrates. Diamond and Related Materials 16(4-7), 1325–1330 (2007)
Ban, M., Hasegawa, T.: Internal stress reduction by incorporation of silicon in diamond-like carbon films. Surface and Coatings Technology 162(1), 1–5 (2003)
Randeniya, L., Bendavid, A., Martin, P., Amin, M., Preston, E., Ismail, F.M., Coe, S.: Incorporation of Si and SiOx into diamond-like carbon films: Impact on surface properties and osteoblast adhesion. Acta Biomaterialia 5(5), 1791–1797 (2009)
Choi, H., Choi, J.H., Lee, K.R., Ahn, J.P., Oh, K.: Structure and mechanical properties of Ag-incorporated DLC films prepared by a hybrid ion beam deposition system. Thin Solid Films 516(2-4), 248–251 (2007)
Takagi, T., Takeno, T., Miki, H.: Metal-containing diamond-like carbon coating as a smart sensor. Materials Science Forum 638-642, 2103–2108 (2010)
Takeno, T., Takagi, T., Bozhko, A., Shupegin, M., Sato, T.: Metal-containing diamond-like nanocomposite thin film for advanced temperature sensors. Materials Science Forum 475-479(III), 2079–2082 (2005)
Takeno, T., Miki, H., Takagi, T., Onodera, H.: Electrically conductive properties of tungsten-containing diamond-like carbon films. Diamond and Related Materials 15(11-12), 1902–1905 (2006)
Takeno, T., Sugawara, T., Miki, H., Takagi, T.: Deposition of DLC film with adhesive W-DLC layer on stainless steel and its tribological properties. Diamond and Related Materials 18(5-8), 1023–1027 (2009)
Takeno, T., Shiota, H., Sugawara, T., Miki, H., Takagi, T.: Highly adherent tungsten-containing diamond-like carbon (W-DLC) coating on a NiTi shape memory alloy under 10% tensile strain. Diamond and Related Materials 18(2-3), 403–406 (2009)
Takeno, T., Miki, H., Sugawara, T., Hoshi, Y., Takagi, T.: A DLC/W-DLC multilayered structure for strain sensing applications. Diamond and Related Materials 17(4-5), 713–716 (2008)
Agrawal, D.C., Raj, R.: Measurement of the ultimate shear strength of a metal-ceramic interface. Acta Metallurgica 37(4), 1265–1270 (1989)
Jeong, J.H., Kwon, D.: Evaluation of the adhesion strength in DLC film-coated systems using the film-cracking technique. Journal of Adhesion Science and Technology 12, 29–46 (1998)
Liu, Y., Liu, Y., Van Humbeeck, J.: Two-way shape memory effect developed by martensite deformation in NiTi. Acta Materialia 47(1), 199–209 (1998)
Liu, Y., Xie, Z., Van Humbeeck, J., Delaey, L.: Asymmetry of stress-strain curves under tension and compression for NiTi shape memory alloys. Acta Materialia 46(12), 4325–4338 (1998)
Xie, Z., Liu, Y., Van Humbeeck, J.: Microstructure of NiTi shape memory alloy due to tension-compression cyclic deformation. Acta Materialia 46(6), 1989–2000 (1998)
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Takeno, T., Shiota, H., Miki, H., Takagi, T., Luo, Y. (2010). Carbon-Based Nanostructured Coatings on NiTi Shape Memory Alloy for Biomedical Applications. In: Liu, H., Ding, H., Xiong, Z., Zhu, X. (eds) Intelligent Robotics and Applications. ICIRA 2010. Lecture Notes in Computer Science(), vol 6425. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16587-0_67
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DOI: https://doi.org/10.1007/978-3-642-16587-0_67
Publisher Name: Springer, Berlin, Heidelberg
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