TY - JOUR
T1 - Effect of high-order multicomponent on formation and properties of Zr-based bulk glassy alloys
AU - Inoue, A.
AU - Wang, Z.
AU - Louzguine-Luzgin, D. V.
AU - Han, Y.
AU - Kong, F. L.
AU - Shalaan, E.
AU - Al-Marzouki, F.
N1 - Funding Information:
The authors thank for supporting research funds of Grant-in-Aid of MEXT ( 26630299 ) in Japan, Recruitment Program of Global Experts “1000 Talents Plan” of China (WQ20121200052) and Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, Saudi Arabia ( 36-130-35/HiCi ).
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/7/25
Y1 - 2015/7/25
N2 - Abstract We examined the formation, thermal stability, mechanical properties and corrosion behavior of a multicomponent Zr55Al10Fe6Co6Ni6Cu6Pd6Ag5 bulk glassy alloy, with the aim of clarifying the effect of high-order multiplication of the number of components on their properties. The bulk glassy alloy rods of 2 and 6 mm in diameter were formed by suction casting even at the low total content of typical glass-forming 3-d late transition metals like Co, Ni and Cu. The Vickers hardness is different in the center region and in the outer surface region. The difference seems to reflect the relaxation level of glassy structure. The Young's modulus and the compressive fracture strength are nearly the same for the base Zr55Al10Ni5Cu30 alloy in spite of the existence of immiscible atomic pairs. Moreover, the multicomponent alloy exhibits better corrosion resistance than that for the base alloy. The glassy phase changes to a supercooled liquid state at 720 K and then starts to crystallize at 754 K with a single exothermic peak, in contrast to the appearance of a wide supercooled liquid region for the base alloy. The primary crystalline phase precipitates with very short incubation time and very low growth rate, which are different from those for the base alloy. The extremely low growth rate of the crystallites is presumably due to the reduction of diffusivity of late transition metal elements resulting from multiplication. Thus, the high-order multiplication has the features of (1) the maintenance of high glass-forming ability even at the lower Co, Ni and Cu content and in the absence of wide supercooled liquid region, (2) the suppression of the decrease in mechanical strength even in the dissolution of immiscible elements, (3) better corrosion resistance, and (4) low growth rate of the primary precipitates.
AB - Abstract We examined the formation, thermal stability, mechanical properties and corrosion behavior of a multicomponent Zr55Al10Fe6Co6Ni6Cu6Pd6Ag5 bulk glassy alloy, with the aim of clarifying the effect of high-order multiplication of the number of components on their properties. The bulk glassy alloy rods of 2 and 6 mm in diameter were formed by suction casting even at the low total content of typical glass-forming 3-d late transition metals like Co, Ni and Cu. The Vickers hardness is different in the center region and in the outer surface region. The difference seems to reflect the relaxation level of glassy structure. The Young's modulus and the compressive fracture strength are nearly the same for the base Zr55Al10Ni5Cu30 alloy in spite of the existence of immiscible atomic pairs. Moreover, the multicomponent alloy exhibits better corrosion resistance than that for the base alloy. The glassy phase changes to a supercooled liquid state at 720 K and then starts to crystallize at 754 K with a single exothermic peak, in contrast to the appearance of a wide supercooled liquid region for the base alloy. The primary crystalline phase precipitates with very short incubation time and very low growth rate, which are different from those for the base alloy. The extremely low growth rate of the crystallites is presumably due to the reduction of diffusivity of late transition metal elements resulting from multiplication. Thus, the high-order multiplication has the features of (1) the maintenance of high glass-forming ability even at the lower Co, Ni and Cu content and in the absence of wide supercooled liquid region, (2) the suppression of the decrease in mechanical strength even in the dissolution of immiscible elements, (3) better corrosion resistance, and (4) low growth rate of the primary precipitates.
KW - Mechanical properties
KW - Metallic glasses
KW - Multicomponent
KW - Thermal stability
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U2 - 10.1016/j.jallcom.2015.03.078
DO - 10.1016/j.jallcom.2015.03.078
M3 - Article
AN - SCOPUS:84925399772
VL - 638
SP - 197
EP - 203
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
M1 - 33689
ER -