کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1657693 | 1517647 | 2013 | 4 صفحه PDF | دانلود رایگان |
For improving the ductility of metallic glasses, nanocrystals within the amorphous matrix are frequently intentionally added. In this study, the MgCuZr thin film metallic glasses (TFMGs) with a positive mixing heat between Mg and Zr are fabricated via co-sputtering in an attempt to separate the pure Mg nano-particles. The microstructure and mechanical properties of the sputtered MgCuZr thin films and their FIB-machined micropillars are examined as a function of Mg content from 39 to 100 at.%. From the nanoindentation and micropillar load–displacement curves, the Mg-rich metallic glass composites exhibit smoother nature and more ductile behavior. Meanwhile, due to strong (0002) basal texture, the Mg-rich thin films and micropillars possess strong modulus (~ 80 GPa), hardness (~ 3.5 GPa), and yield stress (~ 1.5 GPa), coupled with more ductile behavior. All of these would allow promising applications in micro-electro-mechanical systems.
► Strong and ductile amorphous MgZrCu thin-film composites
► Phase separated Mg nano-particles
► Microstructure and nanoindentation/micropillar mechanical behavior
Journal: Surface and Coatings Technology - Volume 231, 25 September 2013, Pages 58–61