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Nitinol –Performance and Property |


Nitinol

It is made of shape memory alloy. This is a special metal alloy that, at a given temperature, can return to its original plastic shape.

Memory alloys have a unique memory function and also excellent characteristics like wear resistance. They are corrosion resistant. They also dampen well.


What is Nitinol Performance?


As its name implies, nickel-titanium powder is a binary metal powder that consists of both nickel and titanium. The austenite phase, and the martensite phases are different due to changes in temperature or mechanical pressure. The order of phase transformations during nickel-titanium alloy heating is parent phase – R phase – martensite. The R phase has a rhombohedral shape, while the austenite cubes become hard and brittle when temperatures are high or when a load is removed. The shape of the material is stable. The martensite is the state of a material at relatively low temperatures, or under loads. It is ductile and repeatable. It’s also unstable and easily bent.


What are the special properties of Nitinol?



Shape Memory:

Shape memory is the process of deforming martensite at temperatures below Mf. This is followed by a reverse phase transition. The material will automatically revert to its parent phase.


Superelasticity:

The term superelasticity describes the phenomenon in which a sample is strained beyond its elastic limit strain when subjected to external forces, but the strain automatically returns after the force has been released.

Sensitivity of orthodontic wires to temperature changes: The orthodontic power and strength of CoCr orthopedic wires is not significantly affected by temperature.


Corrosion resistance

According to recent studies, the corrosion resistance between stainless steel wire and nickel-titanium cable is very similar.


Anti-toxicity:

Nitinol has a special composition. This is because it is an alloy containing nickel at about 50%. Nickel is well known for its carcinogenic properties.


Gentle orthodontic power

currently commercially used orthopedic wires include austenitic stainless steel wires, cobalt-chromium-nickel alloy wires, nickel-chromium alloy wires, Australian alloy wires, gold alloy wires and nickel-titanium alloy wires.

Good shock-absorbing characteristics: The more vibrations of the archwire due to chewing or night molars there are, the greater damage the roots and periodontal tissues suffer.

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