Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 11-17 |
| Number of pages | 7 |
| Journal | Annales de Chimie: Science des Materiaux |
| Volume | 27 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2002 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Materials Chemistry
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Synthesis of bulk metallic glass in the Ti-rich part of the Ti-Cu-Ni-Sn-Be-Zr alloy system. / Kim, Yu Chan; Kim, Won Tae; Kim, Do Hyang.
In: Annales de Chimie: Science des Materiaux, Vol. 27, No. 5, 01.01.2002, p. 11-17.Research output: Contribution to journal › Article
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
PY - 2002/1/1
Y1 - 2002/1/1
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.
UR - http://www.scopus.com/inward/record.url?scp=0036759044&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036759044&partnerID=8YFLogxK
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 -