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Ultrasounds improve nanoceramics production

The application of ultrasounds in the compaction of nanostructured powder during the production of complex shaped goods is an innovative approach that comes as a result of research activities conducted by Tomsk Polytechnic University. This approach appears to have significant technical and economical advantages compared to conventional ones.
Ultrasounds improve nanoceramics production
Forming objects using powder of materials such as ferrous, ceramic, and hard metals is a net shape forming process widely used to manufacture a large variety of products. The powder is placed into dies and pressed to the point where the desired shape will be achieved. The compacted material is then heated to a temperature just below the material’s melting point (sintering) in order for the powder to form a consolidated product. The considerable advantages offered by this method, especially in the production of complex shaped objects, has increased research undertaken in this field.

A research team at the Tomsk Polytechnic University has focussed its interests on the application of powder forming processes in nanotechnology. More specifically, the team guided its research efforts to investigate the effects on the use of powerful ultrasonic action on nanostructured powder during dry compaction of nanostructured compacts. This ultrasonic treatment is tested in the production of nanoceramic substrates, high precision ceramic capillaries and tubes, tough wire dies and insulators. The results showed that this treatment of nanostructured powder inhibits the ceramics grain size growth during sintering and leads to the formation of better nanoceramic structures.

The implementation of this innovative approach provides products that demonstrate improved quality and characteristics in terms of hardness, plasticity, wear-resistance and uniformity of density. Moreover, the 20% decrease of the energy required to complete this process, in combination with the less defected products and the simplification of the overall procedure provide a significant cost reduction.
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