is called shape memory alloy. This is a special alloy with good plasticity and that automatically recovers its plastic deformation at a given temperature to its original shape.
Apart from their unique shape memory feature, memory alloys offer excellent properties such as corrosion resistance, wear resistance, and high damping.
1.What’s Performance of Nitinol like?
The name nickel-titanium alloy powder refers to a binary powder that is made up of titanium and nickel. Two crystal phases are formed by temperature and pressure changes. These two phases are austenite phase or martensite. It is called parent phase, R phase and martensite phases in the nickel-titanium alloy cooling phase. The R phase, which is rhombohedral and austenite when it is heated or is under load, is hard. This shape is very stable. Martensite is stable at relatively low temperature and under loading. It is hexagonal in shape, repeatable and stable, with easy deformation.
2.What is Nitinol’s special property?
The shape memory properties
If the parent phase is below Af temperature and below Mf temperature to create martensite (or shape memory), the martensite will be deformed below Mf. Reverse phase transformation is also performed. It will then automatically return to its parent phase.
This phenomenon is known as superelasticity. It refers to the fact that the sample creates a strain greater than the elastic limit strain of the external force. When the load is removed, the strain can recover.
Temperature changes in the dental cavity can affect the sensibility of orthodontic wires made from stainless steel and CoCr alloy. However, the temporal cavity temperature does not impact the orthodontic power.
The resistance to erosion
Study after study has revealed that nickel-titanium steel wire exhibits a corrosion resistance similar to stainless steel.
Nitinol Shape Memory Alloy has a very special chemical composition. This means that it is an atomic alloy like Nitinol. Nitinol contains around 50% nickel. Nickel is also known to be carcinogenic.
Gentle orthodontist 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.
High shock absorption: More vibrations from chewing, night molars and other activities can cause damage to the roots and periodontal tissue.
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