Results 141 to 150 of about 405,255 (187)

Microstructure of As-cast NiTi alloy

Materials Characterization, 1991
Abstract The metallography of as-cast NiTi alloy, of presumably pseudoelastic composition, is described. Characteristic morphologies, obtained in NiTi microstructure, were produced by different solidification conditions. A method is suggested to avoid the formation of primary hard phases during solidification.
M. Thier, M. Hühner, E. Kobus, D. Drescher, C. Bourauel   +4 more
openaire   +1 more source

Fabrication of NiTi alloy: A review

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2015
Nitinol (NiTi) is categorized as a smart material which is highly recognized material for medical and other engineering applications. The behaviour of NiTi can be modified by altering the composition, modifying the porosity and applying external thermal and mechanical treatment.
Neeraj Sharma, Kamal K Jangra, Tilak Raj
openaire   +1 more source

Transformation cycling in NiTi alloys

Journal of Physics F: Metal Physics, 1984
NiTi alloys with different transition temperature sets Ms, TR and Af are considered here to be affected by cycling between the martensite and the parent phase. In alloys with a starting temperature Ms higher than 50 degrees C, Ms can shift on cycling below the critical temperature TR at which a transition to the rhombohedral (R) phase appears.
G Airoldi, G Bellini, C Di Francesco
openaire   +1 more source

A new memristor based on NiTi smart alloys

2012 IEEE International Symposium on Circuits and Systems, 2012
With the recent discovery of the memristor, and following the initial realization based on titanium dioxide (TiO 2 ), a plethora of potential device implementations have emerged. In this paper we present a novel memristive device based on a nickel titanium (NiTi) smart alloy.
Kyriakides, Elias, Hadjistassou, C., Georgiou, J., Kyriakides, Elias, Hadjistassou, C., Georgiou, J.   +5 more
openaire   +3 more sources

Physical Characterisation of Endodontic Instruments in NiTi Alloy

Materials Science Forum, 2000
NiTi based endodontic instruments are investigated in functionality and wear. The instrument surfaces have been studied applying Auger electron spectroscopy, mechanical analysis, differential-scanning calorimetry, wear tests, and scanning electron microscopy.
L Torrisi, G Di Marco
openaire   +5 more sources

NiTi Alloys in Orthodontics

2000
In orthodontics, we are moving teeth within the bone in order to bring the teeth into a good functional position and alignment. Therefore, we are using a fixed appliance technique. In orthodontic-fixed appliance therapy, the physical properties of the materials play an important role in the application of force to the teeth. To move teeth, we are using
openaire   +1 more source

Chinese NiTi wire—A new orthodontic alloy

American Journal of Orthodontics, 1985
Chinese NiTi wire was studied by means of a bending test to determine wire stiffness, springback, and maximum bending moments. Chinese NiTi wire has an unusual deactivation curve (unlike steel and nitinol wires) in which relatively constant forces are produced over a long range of action. The characteristic flexural stiffness of NiTi wire is determined
C J, Burstone, B, Qin, J Y, Morton
openaire   +2 more sources

Biocompatibility and hemocompatibility of surface‐modified NiTi alloys

Journal of Biomedical Materials Research Part A, 2003
AbstractNickel titanium (NiTi) shape memory alloys have been investigated for several years with regard to biomedical applications. However, little is known about the influences of surface modifications on the biocompatibility of these alloys. The effects of a range of surface treatments were investigated.
David A, Armitage, Terry L, Parker, David M, Grant   +2 more
openaire   +2 more sources

Selective de-alloying of NiTi by oxochloridation

Corrosion Science, 2008
Abstract The systematic modification of a nickel–titanium-alloy by annealing in a complex gas atmosphere was investigated. A mixture of HCl and H2O in inert argon was chosen. The reaction kinetics was investigated at 600 °C, 700 °C and 800 °C. The reaction kinetics displayed a significant dependence on the temperature.
Hassel, A., Neelakantan, L., Zelenkevych, A., Ruh, A., Spiegel, M.   +4 more
openaire   +2 more sources

Effects of sterilization processes on NiTi alloy: Surface characterization

Journal of Biomedical Materials Research, 2000
Sterilization is required for using any device in contact with the human body. Numerous authors have studied device properties after sterilization and reported on bulk and surface modifications of many materials after processing. These surface modifications may in turn influence device biocompatibility.
B, Thierry, M, Tabrizian, O, Savadogo, L, Yahia   +3 more
openaire   +3 more sources