Results 211 to 220 of about 21,705 (266)

Diffusion processes in NiTi/Si, NiTi/SiO2 and NiTi/Si3N4 systems under annealing

Thin Solid Films, 2004
Abstract We present a nanometric scale analysis of the NiTi/Si, NiTi/SiO 2 and NiTi/Si 3 N 4 systems before and after annealing at 500 °C during 30 min, by secondary ion mass spectrometry and electron-induced X-ray emission spectroscopy. Before annealing, a few nanometers thick transition layer forms at the interface of each system. Under annealing,
I Jarrige, P Holliger, P Jonnard
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Martensitic Transformation of NiTi and NiTi-TiC Composites

Journal de Physique IV, 1995
Calorimetry and internal friction were used to study the martensitic phase transformation of shape-memory metal matrix composites consisting of nearly equiatomic NiTi with up to 20 vol.% TiC particles. The start and final temperatures for the austenite-martensite transformation (M s , Mf) and martensite-austenite transformation (A s , A f ) arc lower ...
D. Mari, L. Bataillard, D.C. Dunand, R. Gotthardt   +3 more
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Depositions of Nitrogen on NiTi Instruments

Journal of Endodontics, 2002
This study was designed to obtain nitrogen-rich layers on the surfaces of endodontic files made of nickel-titanium (NiTi) alloy by chemical vapor deposition. Experimental samples (GT rotary instruments) were deposited by using two different methods.
TRIPI, Teresa Roberta, Bonaccorso A, Rapisarda E, Tripi V, CONDORELLI, Guglielmo Guido, Marino R, Fragala I.   +6 more
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Fabrication and characterization of NiTi/Ti3SiC2 and NiTi/Ti2AlC composites

Journal of Alloys and Compounds, 2014
Abstract Spark plasma sintering (SPS) was used as a fast consolidation technique to reduce reactions during powder consolidation of highly reactive systems (shape memory alloy/ternary carbide composites), which could not otherwise be fabricated using conventional methods.
Liangfa Hu, Ankush Kothalkar, Gwénaëlle Proust, Ibrahim Karaman, Miladin Radovic   +4 more
openaire   +1 more source

Fatigue of NiTi for Dampers and Actuators

Advances in Science and Technology, 2012
The application of Shape Memory Alloy (SMA) devices to practical uses need well established performance. The reliable application in some areas, as dampers in engineering, needs a known, relatively long fatigue life (some million oscillations). The thermomechanical properties of SMA, based on their martensitic transformation, made them attractive to ...
Isalgue A., Torra V., Casciati F., CASCIATI, SARA   +3 more
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Tensile deformation of NiTi wires

Journal of Biomedical Materials Research Part A, 2005
AbstractWe examine the structure and properties of cold drawn Ti‐50.1 at % Ni and Ti‐50.9 at % Ni shape memory alloy wires. Wires with both compositions possess a strong <111> fiber texture in the wire drawing direction, a grain size on the order of micrometers, and a high dislocation density.
Ken, Gall, Jeff, Tyber, Valerie, Brice, Carl P, Frick, Hans J, Maier, Neil, Morgan   +5 more
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Structure of incommensurate NiTi(Fe)

Physical Review B, 1989
NiTi(Fe) has an incommensurate and a commensurate phase between its low-temperature martensitic and high-temperature CsCl-type structures. Anomalous deviations of the satellite positions in the incommensurate phase have been reported. These deviations have raised doubts about the adequacy of a model based on sinusoidal modulations of the basic ...
, Folkins, , Walker
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NITI Aayog

SSRN Electronic Journal
Abstract The chapter presents an account of the mandate of NITI Aayog, an institution which replaced Planning Commission, its activities during the last nine years, and whether the institution lived up to the expectations. The Aayog was set up to bring institutional changes reflecting the changed dynamics of new India, to engage the ...
Y V Reddy, G R Reddy, Pinaki Chakraborty
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Laser spray cladding of porous NiTi coatings on NiTi substrates

Surface and Coatings Technology, 2007
Abstract Laser spray cladding in N 2 -rich atmosphere is a competitive technique for manufacture of porous NiTi shape memory alloy (SMA) and TiN surface film. In order to gain expected porous coating and porosity size, TiH 2 powder was considered to be used as porosity initiating agent, and nitrogen was used for shielding and active nitriding gas ...
Y.Q. Yang, H.C. Man
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Oxidation of an NiTi alloy

Surface and Interface Analysis, 1990
Abstract In this study, the oxidation of the surface of a 50/50 (at.%) NiTi alloy was studied by XPS, AES and SEM. Samples of the NiTi alloy were oxidized at 23°C and high temperatures at an oxygen pressure of 10 −4 Torr and in atmosphere. At 10 −4
C.‐M. Chan, S. Trigwell, T. Duerig
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