TY - JOUR
T1 - Effect of Au content on thermal stability and mechanical properties of Au-Cu-Ag-Si bulk metallic glasses
AU - Guo, H.
AU - Zhang, W.
AU - Chen, M. W.
AU - Saotome, Y.
AU - Fukuhara, M.
AU - Inoue, A.
N1 - Funding Information:
This work was financially supported by the Advanced Materials Development and Integration of Novel Structured Metallic and Inorganic Materials from the Ministry of Education, Science, Sports, and Culture of Japan.
PY - 2011/6
Y1 - 2011/6
N2 - The thermal stability, glass-forming ability (GFA), and mechanical and electrical properties of Au-based Au x Si17Cu 75.5-x Ag7.5 (x = 40 to 75.5 at. pct) metallic glasses were investigated. The glass transition temperature (T g ) and crystallization temperature (T x ) decreased with increasing Au content. The ultralow T g values below 373 K (100 °C) were obtained for alloys with x = 55 to 75.5. The alloys with x = 45 to 70 exhibited a high stabilization of supercooled liquid and a high GFA, and the supercooled liquid region and critical sample diameter for glass formation were in the range of 31 K to 50 K and 2 to 5 mm, respectively. The compressive fracture strength (σ c,f ), Young's modulus (E), and Vicker's hardness (H v ) of the bulk metallic glasses (BMGs) decreased with increasing Au content. A linear correlation between Au concentration and the characteristic temperature, i.e., T g and T x, and mechanical properties, i.e., σ c,f, E, and H v, as well as electrical resistivity can be found in the BMGs, which will be helpful for the composition design of the desirable Au-based BMGs with tunable physical properties.
AB - The thermal stability, glass-forming ability (GFA), and mechanical and electrical properties of Au-based Au x Si17Cu 75.5-x Ag7.5 (x = 40 to 75.5 at. pct) metallic glasses were investigated. The glass transition temperature (T g ) and crystallization temperature (T x ) decreased with increasing Au content. The ultralow T g values below 373 K (100 °C) were obtained for alloys with x = 55 to 75.5. The alloys with x = 45 to 70 exhibited a high stabilization of supercooled liquid and a high GFA, and the supercooled liquid region and critical sample diameter for glass formation were in the range of 31 K to 50 K and 2 to 5 mm, respectively. The compressive fracture strength (σ c,f ), Young's modulus (E), and Vicker's hardness (H v ) of the bulk metallic glasses (BMGs) decreased with increasing Au content. A linear correlation between Au concentration and the characteristic temperature, i.e., T g and T x, and mechanical properties, i.e., σ c,f, E, and H v, as well as electrical resistivity can be found in the BMGs, which will be helpful for the composition design of the desirable Au-based BMGs with tunable physical properties.
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U2 - 10.1007/s11661-010-0584-9
DO - 10.1007/s11661-010-0584-9
M3 - Article
AN - SCOPUS:79958782975
VL - 42
SP - 1486
EP - 1490
JO - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
JF - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
SN - 1073-5623
IS - 6
ER -