Inhomogeneous structure and glass-forming ability in Zr-based bulk metallic glasses

Sun, Yandong; Qu, Dingrong; Sun, Yanan; Liss, Klaus-Dieter; Shen, Jun

doi:10.1016/j.jnoncrysol.2009.09.021

Cited by 15 publications

(11 citation statements)

References 41 publications

(48 reference statements)

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“…6) is similar to those obtained by Sun et al in papers [3,6], especially BMGs with composition Zr 50.7 Cu 28 Ni 9 Al 12.3 . This metallic glass have similar Zr to Cu ratio to that presented in this work equal to 1.81 and 1.83, respectively.…”

Section: Resultssupporting

confidence: 90%

“…It corresponds also to improving GFA with increasing of Cu concentration in Zr-Cu-Ni-Al BMGs. Mentioned authors proposed based on RMC method of local structure modeling model in which density fluctuations and clusters with dense and loose packing volumes appear [6]. They suggest that in these inhomogeneous in atomic scale glasses, dense and loose packing clusters are responsible for GFA.…”

Section: Resultsmentioning

confidence: 99%

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Study of Atoms Arrangement in Zr-Based Bulk Metallic Glass Structure

Pilarczyk

Podwórny

2016

Acta Phys. Pol. A

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Zr-Cu-Ni-Al bulk metallic glass is an attractive alloy system for scientific research and engineering applications. Alloys from this system exhibit high strength, hardness, corrosion resistance and good glass forming ability which makes them useful in many applications. In order to successfully apply amorphous materials, it is necessary to characterize their structure and properties, which are mutually dependent. The mechanical properties of the Zr-based amorphous alloy are the result of its unique, disordered structure. In this experiment, amorphous alloy of desirable composition in the form of a plate with thickness of 2 mm was prepared by melting high purity Zr, Cu, Ni, Al elements and casting into a copper mould by applying an ejection pressure. The amorphousness of rapidly solidified Zr55Cu30Ni5Al10 plate was examined by X-ray diffraction and microscopic observation. These investigations revealed that the studied Zr-based sample was amorphous. Based on experimental X-ray data the pair distribution function was calculated and discussion on possible atoms arrangement was carried out. IntroductionIn the last years, the Zr-based bulk metallic glasses (BMG) have attracted attention because of their excellent glass forming ability and outstanding mechanical properties.From the analysis of literature data it can be concluded that Zr-based bulk amorphous alloys exhibit simultaneously various characteristics such as good cast ability into bulk form, high mechanical strength and good ductility, good and precise deformability, high corrosion resistance, low coefficient of thermal expansion and high elasticity [1,2].In order to successfully apply Zr-based BMGs, it is necessary to accurately characterize their structure, thermal stability, and other properties.At present, the atomic structures in amorphous alloys still remain unknown. It has been discovered that besides the dense random packing there are nanometer scale short-range order clusters and medium-range order clusters packing in the amorphous material. Furthermore, inside the multicomponent bulk metallic glasses atoms are efficiently packed and the structures of the amorphous alloys are the results of efficient cluster packing (ECP) [3].The main aim of the presented work was to obtain Zr 55 Cu 30 Ni 5 Al 10 alloy in an amorphous state and make attempt to examine atoms arrangement in its structure.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Study of Atoms Arrangement in Zr-Based Bulk Metallic Glass Structure

Pilarczyk

Podwórny

2016

Acta Phys. Pol. A

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“…[66], by observation of quasicrystalline structures in solids [40,67], and supported by computer simulations [68,69,70,71] and by many others. A macroscopic icosahedral single crystal has also been grown [72].…”

Section: Density Fluctuations Transport Of Atoms and Solidificationmentioning

confidence: 94%

On Structure and Properties of Amorphous Materials

Stachurski

2011

Materials

147

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Mechanical, optical, magnetic and electronic properties of amorphous materials hold great promise towards current and emergent technologies. We distinguish at least four categories of amorphous (glassy) materials: (i) metallic; (ii) thin films; (iii) organic and inorganic thermoplastics; and (iv) amorphous permanent networks. Some fundamental questions about the atomic arrangements remain unresolved. This paper focuses on the models of atomic arrangements in amorphous materials. The earliest ideas of Bernal on the structure of liquids were followed by experiments and computer models for the packing of spheres. Modern approach is to carry out computer simulations with prediction that can be tested by experiments. A geometrical concept of an ideal amorphous solid is presented as a novel contribution to the understanding of atomic arrangements in amorphous solids.

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“…Of particular interest has been structural ordering upon supercooling [119,120], thermal behavior [121,122], and correlating the mechanical or tensile behavior with local distortions in the local structure [123][124][125][126]. Attention has also been paid to their glass forming ability [127,128] and an important theme has been identifying structural heterogeneities in the deeply supercooled melt [129,130].…”

Section: Experiments On Glasses and Liquidsmentioning

confidence: 99%

A Review of High-Energy X-Ray Diffraction from Glasses and Liquids

Benmore

2012

ISRN Materials Science

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This paper summarizes the scientific trends associated with the rapid development of the technique of high-energy X-ray diffraction over the past decade pertaining to the field of liquids, glasses, and amorphous materials. The measurement of high-quality X-ray structure factors out to large momentum transfers leads to high-resolution pair distribution functions which can be directly compared to theory or combined with data from other experimental techniques. The advantages of combining highly penetrating radiation with low angle scattering are outlined together with the data analysis procedure and formalism. Also included are advances in high-energy synchrotron beamline instrumentation, sample environment equipment, and an overview of the role of simulation and modeling for interpreting data from disordered materials. Several examples of recent trends in glass and liquid research are described. Finally, directions for future research are considered within the context of past and current developments in the field.

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Inhomogeneous structure and glass-forming ability in Zr-based bulk metallic glasses

Cited by 15 publications

References 41 publications

Study of Atoms Arrangement in Zr-Based Bulk Metallic Glass Structure

Study of Atoms Arrangement in Zr-Based Bulk Metallic Glass Structure

On Structure and Properties of Amorphous Materials

A Review of High-Energy X-Ray Diffraction from Glasses and Liquids

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