Surface chemistry of zirconium

Systemic and Local Tissue Response to Titanium Corrosion

“…According to several researchers (Johansson et al, 1994;Sherepo & Red'ko, 2004;Thomsen et al, 1997;Yuanyuan & Yong, 2007), the elasticity, corrosion resistance, and other physico-mechanical properties of zirconium and its alloys www.intechopen.com make them a suitable material for biomedical implants. Because zirconium offers superior corrosion resistance over most other alloy systems, better behavior in biological environments can be presumed (Stojilovic, 2005). Nevertheless, it is not widely used as a clinical material at present (Thomsen et al, 1997), since commercial manufacture of implants from zirconium or its alloys seems to be unfeasible due to the high cost of this material (Sherepo & Red'ko, 2004).…”

Adsorption of water on sulfur dioxide pre-exposed Zircaloy-4 surfaces

“…Saturation with SO 2 at relatively low exposures is consistent with what we observed previously for the SO 2 /Zr(0001) system. 9 It is interesting that in our recent study of SO 2 adsorption on Zry-4 at various temperatures, we observed that more sulfur, and less oxygen, reside near the surface at 600 K than following adsorption at 300 K. 10 This implies that sulfur and oxygen compete for the near-surface sites and that the outcome depends on adsorption temperature.Presumably, this competition is kinetically rather than thermodynamically controlled.…”

“…AES and TPD experiments were conducted in a stainless steel ultra-high vacuum chamber 4 with a base pressure of approximately 3 ð 10 10 Torr. Exposure to water vapor was performed via a molecular beam doser.…”

“…1 The interaction of water with Zircaloy-4 (Zry-4) and Zr surfaces at low temperatures has been recently investigated using Auger electron spectroscopy (AES) and temperature programmed desorption (TPD) methods. 2,3 It was observed that at high exposures water shifts the Zr(MNN) feature by 4.5 eV.…”

Cubic Zirconia Crystalline Surface Oxide Epitaxial Formation on ZrB₂(0001) Confirmed by Circularly-Polarized-Light Photoelectron Diffraction

“…ZrO 2 is a promising candidate for high-k materials and gas sensors [1][2][3]. However, pure c-ZrO 2 does not exist at room temperature (RT).…”