Nitinol Metal Powder – Property and Preparation

What are the properties of nitinol metallic powder?

Nitinol Metal Powder NiTi powder belongs to Shape Memory alloys, also called SMA. This alloy has the ability to completely eliminate deformation when heated at low temperatures, and then restore it after further heating. The alloy with “memory’ effect is the material that retains its original shape.

Many successful applications of nitinol metallic powder have been made in the aerospace industry. The antenna can be made from memory alloy. Fold the parabolic satellite antenna into the body of the artificial satellite before it is launched. It is only necessary to heat the satellite after the rocket launches to place it in a specific orbit. The “memory function” of the folded antenna allows it to unfold and restore its parabolic shape.

Shape memory alloys have many applications in aerospace, electronics and machinery, biomedicine, bridge building, automobile industry, and everyday life.

What is the best way to prepare nitinol metallic powder?

The following raw materials are used for the PREP process to produce spherical metal powders of nitinol: NiTi bars.
The steps of preparation for the PREP method for the preparation of spherical Nitinol Metal Powder are: The raw materials must be weighed and measured according to the experimental plan and then poured directly into the cemented carbide tank ball milling for wet-grinding. The ball milling period is 24 hours. After the ball-milling, the pellets are vacuum-dried, with a drying time of 50 min and a temperature of 38deg C. They are then added as an forming agent to the granulation. The powdered material is placed in a single-column press to be compressed, then it is placed in an integrated dewaxing low pressure sintering furnace. Preparing spherical metal powder from NiTi alloy bars was achieved using the PREP method. This method has excellent mechanical properties and can be used to produce spherical NiTi powder. Among these, nitinol metallic powders are mainly made up of spherical powder particles. The martensite transformation temperatures decrease as the particle size decreases. The PREP method produces spherical powders of nitinol, which are improved in terms of hardness, density and bending strength.

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