Theoretical investigation of the interaction of oxygen with pure and K-doped NiTi shape memory surface alloys
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چکیده
منابع مشابه
Theoretical investigation of the interaction of oxygen with pure and K-doped NiTi shape memory alloys
TiNi alloys are known as good biomaterials for medical applications since they exhibit compatibility with body tissue [1]. However, the possible release of Ni atoms to the body is a typical side effect where it can cause hazards to the operating system. The general interest here is thus to avoid the adverse effect by minimizing the existence of Ni atoms at the biomaterial surface layer. We have...
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Abstract: In the present study the effect of thermomechanical treatment (cold work and annealing) on the transformation behavior of NiTi shape memory alloys was studied. Differential scanning calorimetry was used to determine transformation temperature and its relation to precipitates and defects. Three alloys including Ti-50.3at.% Ni, Ti-50.5at.% Ni (reclamated orthodontic wires) and 50.6at...
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The oxidation of Ti terminated NiTi surfaces is investigated with density functional theory. The surfaces considered are (001) and (110) of the austenite phase (B2) and (010) of the martensite phase (B19’). The favored adsorption sites for atomic oxygen are fourfold hollow on B2 (001), and twofold bridged between two surface Ti atoms on B2 (110) and B19’ (010). Adsorption of one oxygen molecule...
متن کاملDissimilar laser welding of NiTi shape memory alloy to austenitic stainless steel archwires
In this research, dissimilar welding of NiTi shape memory alloy to AISI 304 austenitic stainless steel Archwires was investigated. For this purpose, common straight orthodontic archwire with rectangular cross-section and dimensions of (0.635 × 0.432 mm) were selected and the laser welding technique was used to connect the wires. The microstructure, chemical composition and phasesin the weld zon...
متن کاملDissimilar laser welding of NiTi shape memory alloy to austenitic stainless steel archwires
In this research, dissimilar welding of NiTi shape memory alloy to AISI 304 austenitic stainless steel Archwires was investigated. For this purpose, common straight orthodontic archwire with rectangular cross-section and dimensions of (0.635 × 0.432 mm) were selected and the laser welding technique was used to connect the wires. The microstructure, chemical composition and phasesin the weld zon...
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عنوان ژورنال:
- Computer Physics Communications
دوره 182 شماره
صفحات -
تاریخ انتشار 2011