Exploring the microstructural evolution of Hf-Ti: From nanometallic multilayers to nanostructures

SCRIPTA MATERIALIA

卷:142

Article

Riano, J. Sebastian¹  Hodge, Andrea M.^1,2 

[1] Univ Southern Calif, Dept Chem Engn & Mat Sci, 3650 McClintock Ave, Los Angeles, CA 90089 USA

[2] Univ Southern Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

关键词: Multilayers;    DSC scans;    Segregation;    Grain boundary energy;    Grain growth;   

DOI  :  10.1016/j.scriptamat.2017.08.018

来源: Elsevier

【 摘 要 】

Microstructural changes in nanocrystalline materials are driven by their high grain boundary density and greater mobility at elevated temperatures. For instance, segregation, precipitation, and grain growth become active as the temperature increases. The potential of nanometallic multilayers as a route to synthesize nanostructures is explored examining the microstructural evolution of Hf-Ti nanometallic multilayers through differential scanning calorimetry and characterization at different temperatures. Thermodynamic and kinetic calculations were performed to understand the observed transitions. This study presents a guide to microstructural changes in nanometallic multilayers which can be used to develop new nanocrystalline systems. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free