|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Features of Interfaces in a Cu-Zr-Al Based Metallic Glass Obtained by Densification of Amorphous Powders
||Jean-Marc Pelletier, Sandrine Cardinal, Qing Wang, Guoqiang Xie, Jichao Q
|On-Site Speaker (Planned)
In order to increase the size of bulk metallic glasses, the main idea is to manufacture these materials by densification of amorphous powders. For instance spark plasma sintering (SPS) may be used to achieve this densification. The present investigation reports results obtained in a CuZrAl bulk metallic glass. After optimization of the sintering parameters (especially pressure, duration and temperature), dense and amorphous materials are obtained. Hardness and Young modulus are close to values reported in bulk metallic glasses manufactured by the conventional quenching technique. However, fracture mechanism is really different and observation of the fracture surface reveals specific phenomena at the interface. In order to investigate these mechanisms, different kinds of experiments are performed in the present study, mainly AFM and transmission electron microscopy. Interfaces between particles have been characterized both from chemical and mechanical point of view; the role of oxygen at the particle boundaries is clearly demonstrated.
||Planned: Supplemental Proceedings volume