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2 2007

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Struktura warstw węglowych wytworzonych na stopach NiTi wykazujących pamięć kształtu

Lelątko J., Goryczka T., Rówiński E., Pączkowski P., Drdzeń A., Morawiec H.

Engineering of Biomaterials

2007

Vol. 10, no. 63-64

34-36

Structure and properties of carbon layers on NiTi shape memory alloy

Lelątko J., Goryczka T., Rówiński E., Pączkowski P., Drdzeń A., Morawiec H.

Advances in Materials Science

2007

Vol. 7, nr 3(13)

57-62

NiTi alloys are frequently used in medical applications as a material for implants. The high risk of toxicity, caused by diffusion of nickel ions to the human body, requires developing a technology for deposition of a protective layer. Due to the unique physical and chemical properties the carbon-based layers are one of the possibilities for a surface protection. The carbon layer was deposited on Ni(50.6at%)Ti shape memory alloy using the RFPECVD process. The layers were studied using a wide range of methods. The structure was investigated using a high resolution electron microscope, greasing incident X-ray diffraction and reflectometry. The Auger spectrometer was applied for chemical analyses. Results reveal that the structure of carbon layer consists of nanocrystaline diamond particles in amorphous and/or nano-graphitic matrix. Basing on the Auger spectroscopy it was stated that the layers posses DLC qualities. The layers, deposited in this process, have a good quality and high corrosion resistance.