Products Description
High Temperature Nitinol Memory Paperclip is one of the nitinol memory products, also called SMA paper clip. Speaking of shape memory alloys, many people have heard of its name. No matter how it is deformed, it can magically return to its original shape after being heated to a certain temperature. Therefore, we say it is very smart, Because when it is heated, the metal instantly "remembers" its old shape and springs back to the form of a straight wire. The shape memory effect is caused when the material undergoes a change in the crystal form as it is cooled or heated through its characteristic transformation temperature. So it often used in magic performances, popular science teaching aids, etc.
So far, there are dozens of types of shape memory alloys discovered in the world, of which nitinol alloy is the earliest developed and most practical alloy material.
Special properties of nitinol memory alloy material：
Nitinol is a binary alloy composed of nickel and titanium. In addition to its unique shape memory function and superelasticity function, it also has a series of excellent properties and is a very excellent functional material.
1. Nitinol shape memory characteristics: When deformed by external force at a certain temperature, it can still maintain the deformed shape after the external force is removed, but it can automatically return to its original shape at higher temperatures.
2. Nitinol superelasticity: It's superelasticity can change with changes in heat treatment conditions. When the nitinol alloy wire is heated to above 400°C, the superelasticity begins to decrease.
3. Nitinol corrosion resistance: Studies have shown that the corrosion resistance of nitinol alloy is better than the best medical stainless steel at present, so it is widely used in the medical field.
4. Nitinol biocompatibility: Although nickel has carcinogenic effects, the titanium dioxide on the surface of nitinol alloy acts as a barrier and can inhibit the release of nickel, making nickel-titanium alloy have good biocompatibility.
5. Nitinol has good shock absorption: The initial vibration amplitude of the superelastic nitinol wire is only half that of the stainless steel wire.
The High Temperature Nitinol Memory Paperclip use its Shape memory Special propertie.
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Nitinol Standard ASTM F2063 |
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Name |
Grade |
Transformation Temperature AF |
Form |
Standard |
|
Shape Memory Nitinol Alloy |
Ti-Ni-01 |
20 °C~ 40 °C |
Wire,Rod, Sheet, Tube, Spring, Bracelet,Ring , Paperclip e.t.c |
Customer specified or |
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Ti-Ni-02 |
45 °C~ 90 °C |
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Superelastic Nitinol Alloy |
TiNi-SS |
-5 °C~ 5 °C |
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Low-Temperature Superelastic Nitinol Alloy |
TN3 |
-5°C~ -15°C |
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|
TNC |
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Medical Nitinol Alloy |
TiNi-SS |
33 ± 3 °C |
Wire, Bar,Pipe |
ASTM F2063 |
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Narrow Hysteresis Nitinol Alloy |
Ti-Ni-Cu |
As-Ms ≤ 5 °C |
Wire, bar, |
|
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Wide Hysteresis Nitinol Alloy |
Ti-Ni-Fe |
As-Ms ≤ 150 °C |
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How To Use High Temperature Nitinol Memory Paperclip Magice- Trick !
1
Deform - At room temperature, twist or bend the paperclip. Avoid bending farther than < 90C to ensure longevity of the wire.
2
Pour an appropriate amount of above 60 degrees Celsius hot water into the container or prepare a heating tool.
3
Heat - Submerge the deformed briefly place above a flame or or into hot water above 60 degrees Celsius. Be safe, do not touch the hot paperclip!
4
Watch - See as it spontaneously reverts to its original shape within seconds.
5
Repeat - Share the magic with friends and family, repeat the trick as desired!
FAQ Of Nitinol Memory Alloy:
Q1: What is the superelasticity of Nitinol?
A1: About Superelasticity. Nitinol acts as a super spring through the superelastic effect. It often is widly used for medical, spring, fishing, glasses frame and paragliders e.t.c Superelastic nitinol materials undergo stress-induced transformation and are commonly recognized for their "shape-memory" property. Due to its superelasticity, NiTi wires exhibit "elastocaloric" effect, which is stress-triggered heating/cooling.
Q2: Why does a previously deformed memory metal recover its original shape when heated?
A2: When nitinol alloy is heated, it goes through transformation from martensite to austenite. In the austenite phase, the memory metal "remembers" the shape it had before it was deformed.
Q3: Why is nitinol memory metal so expensive?
A3: Nitinol memory metal is extremely valuable because of its rarity and unique chemical properties. It is a highly rare and difficult-to-mine metal whose abundance in the Earth's crust is far lower than other common metals. At the same time, nitinol memory metal has special properties such as reversible shape memory and superelasticity, making it widely used in scientific research, medical devices and high-end technology fields. Therefore, the scarcity of supply and wide application make nitinol memory metal expensive and a rare material.
Q4: How to make oxidized blue heat treatment for nitinol memory alloy wire:
A4: First, control the temperature between 400-550 degrees; the time needs to be determined based on the color you actually finalize (flexibly adjust the time to get a color that better meets your needs);
The cooling method is water cooling or air cooling; the shaping equipment does not require a vacuum furnace, otherwise blue oxidation will not occur; the above method is limited to a summary of the personal experimental process and can be flexibly adjusted according to your own needs.
High Temperature Nitinol Memory Paperclip Application:
High Temperature Nitinol Memory Paperclip is mainly used in various industries such as temperature-controlled thermal magic teaching aids and children's scientific experiment equipment.
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