Length scale-dependent structural relaxation in Zr57.5Ti7.5Nb5Cu12.5Ni10Al7.5 metallic glass

被引：24

作者：

Scudino, S. ^{[1
]}

Stoica, M. ^{[1
]}

Kaban, I. ^{[1
,2
]}

Prashanth, K. G. ^{[1
]}

Vaughan, G. B. M. ^{[3
]}

Eckert, J. ^{[1
,2
]}

机构：

[1] IFW Dresden, Inst Komplexe Mat, D-01069 Dresden, Germany

[2] Tech Univ Dresden, Inst Werkstoffwissensch, D-01062 Dresden, Germany

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 639卷

关键词：

Metallic glasses; Mechanical alloying; Free volume; Structural relaxation; X-ray diffraction; FREE-VOLUME; RANGE ORDER; TEMPERATURE; TRANSITION; BEHAVIOR;

D O I：

10.1016/j.jallcom.2015.03.179

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Structural relaxation in ball-milled Zr57.5Ti7.5Nb5Cu12.5Ni10Al7.5 glassy powders has been investigated by in-situ high-energy X-ray diffraction. The studies in reciprocal and real space reveal a contrasting behavior between medium- (MRO) and short-range order (SRO). The free volume is not uniformly distributed across the atoms: annihilation of free volume (i.e. shrinking) during heating is observed in the MRO, whereas an increase of free volume (i.e. expansion) occurs in the SRO, implying a denser SRO in the as-milled powder compared to the structurally relaxed material. This behavior is in agreement with the concepts of free volume and anti-free volume and can be attributed to the change of the coordination number in the first nearest-neighbor shell. Finally, the results demonstrate that the first diffuse diffraction maximum in reciprocal space is a reliable indicator to evaluate the structural changes occurring in the MRO. (C) 2015 Published by Elsevier B.V.

引用

页码：465 / 469

页数：5

共 33 条

[1] Thermal expansion of a La-based bulk metallic glass: insight from in situ high-energy x-ray diffraction [J].

Bednarcik, J. ;

Michalik, S. ;

Sikorski, M. ;

Curfs, C. ;

Wang, X. D. ;

Jiang, J. Z. ;

Franz, H. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2011, 23 (25)

[2] Thermal expansion of La-based BMG studied by in situ high-energy X-ray diffraction [J].

Bednarcik, J. ;

Curfs, C. ;

Sikorski, M. ;

Franz, H. ;

Jiang, J. Z. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 504 :S155-S158

[3]

Cahn R.W., 1996, Physical Metallurgy

[4]

Cahn R.W., 1993, MAT SCI TECHNOLOGY C

[5]

Cargill III G.S., 1975, SOLID STATE PHYS

[6] MOLECULAR TRANSPORT IN LIQUIDS AND GLASSES [J].

COHEN, MH ;

TURNBULL, D .

JOURNAL OF CHEMICAL PHYSICS, 1959, 31 (05) :1164-1169

[7] Atomic level stresses [J].

Egami, T. .

PROGRESS IN MATERIALS SCIENCE, 2011, 56 (06) :637-653

[8] A THEORY OF ELECTRICAL PROPERTIES OF LIQUID METALS .3. RESISTIVITY OF BINARY ALLOYS [J].

FABER, TE ;

ZIMAN, JM .

PHILOSOPHICAL MAGAZINE, 1965, 11 (109) :153-+

[9]

Greer A.L., 1993, Rapidly solidified alloys

[10] Two-dimensional detector software: From real detector to idealised image or two-theta scan [J].

Hammersley, AP ;

Svensson, SO ;

Hanfland, M ;

Fitch, AN ;

Hausermann, D .

HIGH PRESSURE RESEARCH, 1996, 14 (4-6) :235-248

← 1 2 3 4 →