Synthesis and structure of nanoparticles in intermetallic Al2Au

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Volkov, A.Y.^1 ; Volkova, E.G.^1

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 18 S. Kovalevskoi st., Ekaterinburg

620137, Russia^1

关键词: After-heat treatment;    Aluminum particle;    Gold powders;    Inter-metallic particle;    Micro and nano-particle;    Scanning transmission electron microscopy;    Structural elements;    Surface depletion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012014/pdf
DOI  :  10.1088/1757-899X/447/1/012014

来源: IOP

【 摘 要 】

The intermetallic compound Al2Au has been obtained from gold powder and aluminum particles through mechanical alloying in ball mills. The intermetallic structure was investigated by the methods of scanning transmission electron microscopy and X-ray diffraction analysis. It was found that mechanical alloying resulted in the formation of micro and nano particles of Al2Au. The powder obtained was compacted into tablets. X-ray diffraction analysis showed intermetallic lines and one line belonging to aluminum, within the compact. The structure of compacts after annealing was investigated. It was determined that compacting promoted the agglomeration of intermetallic particles. Further annealing led to the surface depletion in aluminum, cracking and refinement of structural elements. After heat treatment, a phase enriched in gold - AlAu - is registered in the samples.