TY - JOUR
T1 - Formation, structure, and crystallization behavior of Cu-based bulk glass-forming alloys
AU - Louzguine-Luzgin, D. V.
AU - Xie, G.
AU - Zhang, Q.
AU - Suryanarayana, C.
AU - Inoue, A.
N1 - Funding Information:
This work was supported by the Research and Development Project on Advanced Metallic Glasses, Inorganic Materials and Joining Technology, as well as by Grant-in-Aid ‘‘Priority Area on Science and Technology of Microwave-Induced, Thermally NonEquilibrium Reaction Field’’ N: 18070001 from the Ministry of Education, Culture, Sports, Science and Technology, Japan. One of the authors (CS) is grateful to Tohoku University for the provision of a Visiting Professorship. The authors also sincerely thank Dr. T. Saito for measuring the cooling curves on casting Cu44Ag15Zr36Ti5 bulk samples.
PY - 2010/7
Y1 - 2010/7
N2 - We studied Cu-Zr-based alloys having exceptionally high glass-forming ability (GFA) and investigated the influence of Ag and Al addition on their structure and crystallization behavior. Most of the bulk glassy alloys (BGAs) do not contain any crystals, while some samples studied by high-resolution transmission electron microscopy (HRTEM) were found to contain welldeveloped medium-range order zones and nanoparticles in a bulk form. The crystallization kinetics of Cu55Zr45, Cu50Zr50, Cu55 xZr45Agx (x = 0, 10, 20), Cu 45Zr45Al5Ag5, Cu44Ag 15Zr36Ti5, and Cu36Zr 48Al8Ag8 glassy alloys was analyzed. An influence of the cooling rate on the formation of glassy phase and thermal stability of the Cu-based glassy alloys on heating was also studied. The crystallization kinetics and phase composition of the ribbon-shape and bulk glassy samples of Cu36Zr48Al8Ag8 alloys were also analyzed. The results also indicate that the best glass-forming compositions are possibly located at slightly off-eutectic area, owing to the shift of the eutectic point due to the nonequilibrium processing conditions.
AB - We studied Cu-Zr-based alloys having exceptionally high glass-forming ability (GFA) and investigated the influence of Ag and Al addition on their structure and crystallization behavior. Most of the bulk glassy alloys (BGAs) do not contain any crystals, while some samples studied by high-resolution transmission electron microscopy (HRTEM) were found to contain welldeveloped medium-range order zones and nanoparticles in a bulk form. The crystallization kinetics of Cu55Zr45, Cu50Zr50, Cu55 xZr45Agx (x = 0, 10, 20), Cu 45Zr45Al5Ag5, Cu44Ag 15Zr36Ti5, and Cu36Zr 48Al8Ag8 glassy alloys was analyzed. An influence of the cooling rate on the formation of glassy phase and thermal stability of the Cu-based glassy alloys on heating was also studied. The crystallization kinetics and phase composition of the ribbon-shape and bulk glassy samples of Cu36Zr48Al8Ag8 alloys were also analyzed. The results also indicate that the best glass-forming compositions are possibly located at slightly off-eutectic area, owing to the shift of the eutectic point due to the nonequilibrium processing conditions.
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U2 - 10.1007/s11661-009-0087-8
DO - 10.1007/s11661-009-0087-8
M3 - Article
AN - SCOPUS:77955773973
SN - 1073-5623
VL - 41
SP - 1664
EP - 1669
JO - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
JF - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
IS - 7
ER -