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Arnautov A

Arnautov A

NUST “MISiS”, Russia

Title: Selective laser melting of aluminum matrix composites with ceramic fillers

Biography

Biography: Arnautov A

Abstract

3D printed aluminum details are lightweight (density 2700 kg/m3) and moldable, having an elasticity modulus of ~70 MPa. These are the main requirements of the 3D printing industry. However, aluminum is not strong or hard enough: the tensile strength even for the duralumin alloy is ~500 MPa, and its hardness HB sits at 20 kgf/mm2. The developed modifying precursors for aluminum matrix composites (AMC), based on aluminum nitrides and oxides obtained through combustion or hydrothermal/dry Al oxidation, have become the basis of the new composite. We develop a technology to strengthen the AMC obtained by 3D printing, and we have obtained innovative precursor-modifiers. Combustion or oxidation products - aluminum nitrides and oxides - are specifically prepared for sintering branched surfaces with transition nanolayers formed between the particles. It is the special properties and structure of the surface that allows the particles to be firmly attached to the aluminum matrix and, as a result, increase the strength of the obtained composites.