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This is a type of shape memory metal and it’s used in 3D printers. Shape memory alloy is an alloy that has a good plasticity and can restore its deformation automatically at a given temperature.
Nitinol alloy is made up of two metals, titanium and nickel. The austenite phase, and the martensite, are different phases of crystallization due to temperature and mechanical stress changes. The nickel-titanium metal alloy has many other excellent characteristics, such as corrosion resistance, super elasticity, and wear resistance.
Nitinol Powder Performance
1. Shape memory
The material automatically returns to its mother phase when it undergoes a reverse phase transformation. It is true that the shape memory process is a thermally initiated phase transformation of Nitinol.
The superelasticity of a material is the ability to automatically restore its original strain after it has been loaded. It is the case that, when the alloy is in its parent phase due to stress applied, the martensitic transition occurs. This results in a different mechanical behavior than ordinary materials.
3. Sensitivity in the mouth to temperature changes
The temperature in the mouth cavity does not affect the correction force of CoCr alloy wire or stainless steel wire. The temperature in the oral cavity affects the corrective force of super-elastic nickel titanium alloy orthopedic wire.
4. Corrosion resistance
According to recent studies, the corrosion resistance between stainless steel wire and nickel-titanium cable is very similar.
This alloy is a nickel-titanium atomic alloy, containing approximately 50% nickel. Nickel has been known to be carcinogenic, causing cancer. In normal conditions, the titanium oxide surface layer acts as barrier. This makes Ni-Ti alloy biocompatible. TiXOy, TixNiOy, and TixNiOy are surface layers that can inhibit Ni release.
6. Corrective correction
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 ss titanium alloy wires. Nitinol has the lowest unloading curve and flattest platform, which indicates that it is capable of providing the softest and most durable correction force.
7. Good shock absorption properties
The root and periodontal tissue is more damaged by the higher the vibration caused by the archwire. The results of various arch wire attenuation studies have revealed that the vibration amplitude for stainless steel wire is greater than that of super elastic Ni-Ti. The initial vibratory amplitude of Ni-Ti super-elastic arch wire is half that for stainless steel arch wire. The health of teeth is extremely important.
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