Shenzhen Wuge Industrial Co., Ltd

Nickel titanium alloy is a metal alloy formed by the fusion of nickel and titanium in a specific ratio. It has unique shape memory effect and excellent properties such as superelasticity, and has important applications in multiple fields. The following is a detailed introduction:

Characteristic

Shape memory property: At lower temperatures, nickel titanium alloys can be easily deformed. When the temperature rises to a specific transition temperature range, it quickly returns to its original shape. This is due to the rearrangement of nickel titanium atoms at different temperatures, causing changes in crystal structure.

Superelasticity: In the parent phase state, nickel titanium alloys can generate strains far greater than their elastic limit strain under external forces. When unloaded, the strain can automatically recover, and the elastic limit is much greater than that of ordinary materials. It no longer follows Hooke's law and can be divided into two categories: linear hyperelasticity and nonlinear hyperelasticity.

Corrosion resistance: Inheriting the corrosion resistance of nickel, it can maintain structural stability in complex environments such as humidity, acidity, and alkalinity, and is not easily corroded.

Good biocompatibility: In general, the titanium oxide layer on the surface of nickel titanium alloy can act as a barrier to inhibit the release of nickel, making it more compatible with human tissues and less likely to cause rejection reactions.

Soft orthodontic force: Compared with other orthodontic metal wires, nickel titanium alloy has the lowest and flattest unloading curve platform, which can provide long-lasting soft orthodontic force and is suitable for dental correction.

Good shock absorption characteristics: Its initial vibration amplitude is small, compared to traditional archwires such as stainless steel wire, it can better reduce the vibration caused by chewing and night grinding on archwires, and cause less damage to tooth roots and periodontal tissues.

Microstructure: There are usually two crystal structures: austenite and martensite. At higher temperatures, austenite structure is formed; At lower temperatures, it will spontaneously transform into a martensitic structure, and the mutual transformation between the two structures will bring about changes in material properties.

Application area 

In the medical field, it is widely used to manufacture vascular stents, dental appliances, surgical instruments, etc. For example, vascular stents can use body temperature to dilate narrow blood vessels in the body, and orthodontic braces can gently apply force to correct teeth according to changes in oral temperature.

In the aerospace field, due to its lightweight, high strength, and fatigue resistance, it is used as a delicate connector for aircraft, key components for satellites, etc., which helps to reduce the weight of spacecraft and make it operate more reliably.

In the field of civilian products, they are commonly found in eyeglass frames, watch straps, etc. By utilizing their memory function and comfort, they can provide users with a better experience.

Other fields: It can also be applied to sensors, brakes, deep-sea exploration equipment, intelligent wearable devices, high-speed rail transit, precision instruments and meters in the automotive industry, and many other fields, leveraging its unique performance advantages.