TY - JOUR
T1 - Synthesis of bulk metallic glass in the Ti-rich part of the Ti-Cu-Ni-Sn-Be-Zr alloy system
AU - Kim, Yu Chan
AU - Kim, Won Tae
AU - Kim, Do Hyang
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2002
Y1 - 2002
N2 - The glass forming ability and crystallization behaviour of melt spun Ti50-xCu25 Ni15Sn3Be7Zrx (x = 0, 3 and 5) amorphous alloys were investigated using differential scanning calorimetry (DSC), X-ray diffractometry and transmission electron microscopy. With increasing Zr contents, x from 0 to 5, ? Tx (= Tx - Tg) and Trg(= Tg/Tl), where Tg=glass transition temperature, Tx=crystallization temperature and Tl=liquidus temperature, gradually increase from 45 K to 56 K and from 0.57 to 0.60, respectively. The Ti50Cu25Ni15Sn3Be7 alloy shows three exothermic events in the DSC curve; initially the alloy crystallizes by forming a few nanometer scale crystalline phase, followed by decomposition into a mixture of Ti(Ni,Cu), TiCu, Ti3Sn, and TiBe12 phases at high temperature. Furthermore, the alloys containing Zr exhibit the formation of nanocrystalline phases of ∼10 nm size even after the second exothermic event due to their increased atomic packing density. For the Ti45Cu25 Ni15Sn3Be7Zr5 alloy, fully amorphous rods up to 5 mm in diameter were successfully fabricated by injection casting.
AB - The glass forming ability and crystallization behaviour of melt spun Ti50-xCu25 Ni15Sn3Be7Zrx (x = 0, 3 and 5) amorphous alloys were investigated using differential scanning calorimetry (DSC), X-ray diffractometry and transmission electron microscopy. With increasing Zr contents, x from 0 to 5, ? Tx (= Tx - Tg) and Trg(= Tg/Tl), where Tg=glass transition temperature, Tx=crystallization temperature and Tl=liquidus temperature, gradually increase from 45 K to 56 K and from 0.57 to 0.60, respectively. The Ti50Cu25Ni15Sn3Be7 alloy shows three exothermic events in the DSC curve; initially the alloy crystallizes by forming a few nanometer scale crystalline phase, followed by decomposition into a mixture of Ti(Ni,Cu), TiCu, Ti3Sn, and TiBe12 phases at high temperature. Furthermore, the alloys containing Zr exhibit the formation of nanocrystalline phases of ∼10 nm size even after the second exothermic event due to their increased atomic packing density. For the Ti45Cu25 Ni15Sn3Be7Zr5 alloy, fully amorphous rods up to 5 mm in diameter were successfully fabricated by injection casting.
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U2 - 10.1016/S0151-9107(02)80040-X
DO - 10.1016/S0151-9107(02)80040-X
M3 - Article
AN - SCOPUS:0036759044
VL - 27
SP - 11
EP - 17
JO - Annales de Chimie: Science des Materiaux
JF - Annales de Chimie: Science des Materiaux
SN - 0151-9107
IS - 5
ER -