Characterisation of an Al-BN nanocomposite prepared by ball milling and hot extrusion

38th Risø International Symposium on Materials Science

Arlic, U.^1 ; Drozd, Z.^2 ; Trojanová, Z.^2 ; Molnárová, O.^2 ; Kasakewitsch, A.^3

Institute of Materials Science and Engineering, Clausthal University of Technology, Clausthal-Zellerfeld

38678, Germany^1

Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague 2

121 16, Czech Republic^2

Weber Maschinenbau GmbH, Norden

26506, Germany^3

关键词: Aluminium matrix;    Aluminium powder;    Amplitude Dependent Damping;    Hot extrusion;    Linear thermal expansions;    Nanocomposite systems;    Vickers microhardness;    Wide temperature ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/219/1/012011/pdf
DOI  :  10.1088/1757-899X/219/1/012011

来源: IOP

【 摘 要 】

Aluminium-matrix-nanocomposites were manufactured by ball milling of microscale aluminium powder with BN nanoparticles in air, followed by subsequent consolidation by hot extrusion. The microstructure of the samples was studied using scanning electron microscopy. Vickers microhardness measurements were used to probe the mechanical properties of the samples. The amplitude dependent damping of the nanocomposites was measured at room temperature after thermal treatment of samples, and the linear thermal expansion was measured over a wide temperature range from room temperature up to 670K in the as-extruded state. The experimental results give a comprehensive picture of the behaviour of this nanocomposite system over the range of thermomechanical treatment conditions examined in this study. Based on these experimental data some possible influences of BN nanoparticles on the anelastic, plastic and thermal properties of microcrystalline aluminium are discussed.