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NUST MISIS scientists will be the strength of the 3D printing aluminum composite doubled
Oct 12, 2018

NUST MISIS scientists put forward a kind of advanced production of ultra high purity alumina (UHPA) method, this method can make the 3D printing aluminum double the strength of the composite material, and to increase the properties of these products to the quality of titanium alloy.The developed 3D printing modifier can be used in the aerospace industry products.


Aerospace, Marine and medical industry are using titanium, aluminum and steel weight of 3D printing, time and cost advantage.Aluminum light weight (density of 2700 kg/m3), plastic and elastic modulus of about 70 MPa.This is suitable for 3D printing industry one of the main requirements of metal;However, the strength of the aluminum itself is not enough or soundness: even the hard aluminum alloy tensile strength is 500 mpa, brinell hardness HB for 20 KGF/was.

On the basis of nitrides and alumina, modified precursor is obtained by burning has become a new type of composite foundation.NUST MISiS research team used a purity of 99.7% aluminum particles.Through oxidation, with alkali reaction, then the hydrochloric acid and 1450 ℃ heat calcining, UHPA impurities, especially total iron impurity concentration is reduced, and the concentration of alkali metal (K, Na, Li), on the other hand, increased.



Researchers studied the follow-up after acid and heat treatment of the evolution process of impurity concentration, found that the proposed method can be respectively from the initial purity of 99.70% and 99.99% of aluminium ball UHPA produce a purity of 99.99% and 99.999%.

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