Thermomechanical Study of Combustion Synthesized Ti-Ni Shape Memory Alloy

“…Due to their unique shape memory properties, superelasticity, resistance to fatigue and corrosion, biocompatibility, and bioactivity, they have been utilized in biomedical applications as implants and prostheses [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

EIS study of porous NiTi biomedical alloy in simulated body fluid

Attarchi

Mazloumi

Behckam

et al. 2009

Materials & Corrosion

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The electrochemical impedance spectroscopy was used for monitoring the formation of surface film on a fixtured sintering porous NiTi biomedical alloy in simulated body fluid (SBF) media during 12 days. Effect of NiTi sintering time on the formation of surface film in SBF was investigated. The formed surface film was calcium phosphate hydrate (CPH) with a pillar particulate structure which was developed to a spongy network with increasing the sintering time. Using such electrochemical techniques, it was shown that NiTi samples obtained after 3 h sintering at 950 8C, have higher tendency for the formation of a stable CPH film during the test.

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“…[8,11] This can be achieved by annealing of the alloy at 500ºC or less. [17][18][19] Although considerable achievements have been obtained on Ni-Ti Shape memory alloy (SMA) during past years, there are still controversies on how to precisely control the SMA characteristics. [20] An important issue is the choice of alternative production methods as they affect the chemical homogeneity, the porosity, and the contaminants added to the melt.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mechanical Alloying and Sintering on Ni–Ti Powders

Sadrnezhaad

Selahi

2004

Materials and Manufacturing Processes

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Commercially pure nickel-titanium powders were mechanically milled in a vertical attritor mill under protective atmosphere for various times from 10 to 24 hr. Products were then compacted and sintered at different temperatures for different times. Amorphization and interatomic phase formation were determined by X-ray diffractometry, scanning electron microscopy and differential scanning calorimetry. Porosity, virtual density, transition temperatures and the amount of Ni 3 Ti first increased and then decreased with the milling time. Presence of oxygen in the milling atmosphere showed partial crystallization of NiTi intermetallic compound accompanied with titanium oxide formation.

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Thermomechanical Study of Combustion Synthesized Ti-Ni Shape Memory Alloy

Cited by 13 publications

References 19 publications

Optimum temperature for recovery and recrystallization of 52Ni48Ti shape memory alloy

Optimum temperature for recovery and recrystallization of 52Ni48Ti shape memory alloy

EIS study of porous NiTi biomedical alloy in simulated body fluid

Effect of Mechanical Alloying and Sintering on Ni–Ti Powders

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