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Nitinol
Shape memory alloys are special alloys that have good plasticity and can restore their original shape automatically at a given temperature.
Nitinol alloy is a form memory alloy. It is a unique alloy that is capable of restoring its plastic deformation back to its original state at a specified temperature. Its expansion rate exceeds 20%, its damping characteristics are ten times greater than those of ordinary springs and it has a corrosion resistance that is superior to the best medical stainless-steel at the moment. It is one of the best functional materials.
The memory alloy is not only a unique shape memory material, but it also offers excellent wear resistance and corrosion resistance. It has high damping properties, too.
2. Superelasticity When referring to superelasticity, it is the phenomenon in which a sample under the influence of an external force produces a much greater strain than its elastic limitstrain and that strain automatically recovers when the force is released. In comparison with shape memory, superelasticity does not involve thermal energy. Superelasticity, in a nutshell, means that stress doesn’t increase with strain increase within a specific deformation range. The superelasticity can be classified into linear and nonlinear. Nonlinear superelasticity is the resultant of stress-induced martensitic phase transformations and their reverse phase transformations during loading and releasing in a temperature range above Af. The nonlinear pseudoelasticity is called phase-transformation pseudoelasticity. Nitinol’s phase-change pseudo-elasticity can reach 8%.
3. Sensitivity of orthodontic wire to temperature changes: The orthodontic power and CoCr alloy orthopaedic wire are not affected by temperature changes. The temperature in the oral cavity affects the corrective force of super-elastic Nickel-Titanium alloy orthodontic wire. When the amount deformation is constant. Corrective force increases with temperature. On one hand, the temperature can increase the speed of tooth movement. The temperature changes within the oral cavity will cause the stagnant flow of blood to increase, nourishing the repair cells during tooth movement. Maintain vitality and normal functions. Orthodontists are unable to precisely measure or control orthodontic forces in the oral environment.
4. The corrosion resistance of Nickel-Titanium Wire is comparable to that of stainless Steel Wire.
5. Anti-toxicity: Nitinol, the shape memory metal, has a chemical composition that is unique. It contains about 50% nickel and is known for its carcinogenic properties. In normal circumstances, titanium oxide on the surface acts as barrier. This makes Ni-Ti alloy biocompatible. TiXOy, TixNiOy and TixNiOy on the surface can inhibit Ni release.
6. 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 ss-titanium alloy wires. These orthodontic wires have been tested in tensile and three-point bend tests. Nitinol’s unloading platform is the lowest, flattest and shows that it provides the most durable and gentle correction force.
7. Good shock absorption: The more vibrations caused by night molars and chewing on the arch wire the greater damage is done to periodontal and root tissues. Through different archwire attenuation studies, it was found that the vibratory amplitude of the stainless steel wire was greater than that of the super-elastic nickel-ti wire. The initial vibratory amplitude for super-elastic Ni Ti arch wire is less than half of that for stainless steel. Traditional archwires, like stainless steel, can increase root resorption.
Tech Co., Ltd. is a professional 3D printing Powders We are a chemical product supplier with 12 years of experience. We accept payment by Credit Card, T/T (West Union), Paypal and T/T. The goods will be shipped to overseas customers via FedEx or DHL.
You can contact us for high quality nitinol. Contact us Send an inquiry.
Nitinol alloy is a form memory alloy. It is a unique alloy that is capable of restoring its plastic deformation back to its original state at a specified temperature. Its expansion rate exceeds 20%, its damping characteristics are ten times greater than those of ordinary springs and it has a corrosion resistance that is superior to the best medical stainless-steel at the moment. It is one of the best functional materials.
The memory alloy is not only a unique shape memory material, but it also offers excellent wear resistance and corrosion resistance. It has high damping properties, too.
Nitinol Powder Special Properties
1. Shape memory properties (shape-memory) Shape memory is formed when the parent of a shape is cooled to below Mf temperatures from above Af temperatures. This martensite phase is then deformed and heated back to Af. When the material undergoes a reverse phase shift, it will automatically regain its original shape. The Nitinol phase change process that causes the shape memory is thermally induced.2. Superelasticity When referring to superelasticity, it is the phenomenon in which a sample under the influence of an external force produces a much greater strain than its elastic limitstrain and that strain automatically recovers when the force is released. In comparison with shape memory, superelasticity does not involve thermal energy. Superelasticity, in a nutshell, means that stress doesn’t increase with strain increase within a specific deformation range. The superelasticity can be classified into linear and nonlinear. Nonlinear superelasticity is the resultant of stress-induced martensitic phase transformations and their reverse phase transformations during loading and releasing in a temperature range above Af. The nonlinear pseudoelasticity is called phase-transformation pseudoelasticity. Nitinol’s phase-change pseudo-elasticity can reach 8%.
3. Sensitivity of orthodontic wire to temperature changes: The orthodontic power and CoCr alloy orthopaedic wire are not affected by temperature changes. The temperature in the oral cavity affects the corrective force of super-elastic Nickel-Titanium alloy orthodontic wire. When the amount deformation is constant. Corrective force increases with temperature. On one hand, the temperature can increase the speed of tooth movement. The temperature changes within the oral cavity will cause the stagnant flow of blood to increase, nourishing the repair cells during tooth movement. Maintain vitality and normal functions. Orthodontists are unable to precisely measure or control orthodontic forces in the oral environment.
4. The corrosion resistance of Nickel-Titanium Wire is comparable to that of stainless Steel Wire.
5. Anti-toxicity: Nitinol, the shape memory metal, has a chemical composition that is unique. It contains about 50% nickel and is known for its carcinogenic properties. In normal circumstances, titanium oxide on the surface acts as barrier. This makes Ni-Ti alloy biocompatible. TiXOy, TixNiOy and TixNiOy on the surface can inhibit Ni release.
6. 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 ss-titanium alloy wires. These orthodontic wires have been tested in tensile and three-point bend tests. Nitinol’s unloading platform is the lowest, flattest and shows that it provides the most durable and gentle correction force.
7. Good shock absorption: The more vibrations caused by night molars and chewing on the arch wire the greater damage is done to periodontal and root tissues. Through different archwire attenuation studies, it was found that the vibratory amplitude of the stainless steel wire was greater than that of the super-elastic nickel-ti wire. The initial vibratory amplitude for super-elastic Ni Ti arch wire is less than half of that for stainless steel. Traditional archwires, like stainless steel, can increase root resorption.
Tech Co., Ltd. is a professional 3D printing Powders We are a chemical product supplier with 12 years of experience. We accept payment by Credit Card, T/T (West Union), Paypal and T/T. The goods will be shipped to overseas customers via FedEx or DHL.
You can contact us for high quality nitinol. Contact us Send an inquiry.