Discovering inch-diameter metallic glasses in three-dimensional composition space

Ma, Han; Shi, Lingling; Xu, Jie; Li, Y.; Ma, Evan

doi:10.1063/1.2126794

Cited by 216 publications

(130 citation statements)

References 24 publications

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“…[1][2][3][4][5][6] The underlying mechanisms for the high glass forming ability (GFA) of these alloys are not completely understood. From a structural point of view, BMGs should have similar structures as their corresponding liquids.…”

Section: Qk Jiang Zy Chang Xd Wang and Jz Jiangmentioning

confidence: 99%

Structures at Glassy, Supercooled Liquid, and Liquid States in La-Based Bulk Metallic Glasses

Jiang

Chang

Wang

et al. 2009

Metall Mater Trans A

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Local atomic structures at glassy, supercooled liquid, and liquid states for La-based bulk metallic glasses (BMGs) have been investigated by in-situ high-temperature X-ray diffraction. It is found that the coordination number of about 15.1 ± 0.1 for the La 62 Al 14 Cu 11.7 Ag 2.3 Ni 5 Co 5 alloy does not depend on temperature up to liquid temperature, while it decreases slightly with temperature for the La 62 Al 14 Cu 24 and La 62 Al 14 Cu 20 Ag 4 alloys. The S(q) data recorded at the supercooled liquid region can be well described by the Debye theory. For the three alloys, the volume expansion coefficient and the slopes of radii variation for the first to third nearest neighboring coordination shells show differences at glassy-to-supercooled liquid transition, while no obvious changes were detected at supercooled liquid-to-liquid transition for them. The linear expansion coefficient value (b = 1.6 ± 0.1 9 10 -5 K -1 ) below the glass transition temperature deduced from S(q) data is consistent with that detected by the dilatometer (b = 1.25 9 10 -5 K -1 ) for the La 62

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Section: Qk Jiang Zy Chang Xd Wang and Jz Jiangmentioning

confidence: 99%

Structures at Glassy, Supercooled Liquid, and Liquid States in La-Based Bulk Metallic Glasses

Jiang

Chang

Wang

et al. 2009

Metall Mater Trans A

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“…It has been found that microalloying with proper alloying elements can dramatically improve the GFA of various BMGs [23][24][25]. Previous studies showed that the GFA of Cu-, Mg-and ZrCu-based bulk metallic glasses were significantly enhanced by adding Ag [26][27][28][29]. In this work, Ag was also chosen as the doping element in the Zr 35 Ti 30 Cu 7.5 Be 27.5 system, which had a critical diameter of about 15 mm and a wide supercooled liquid region of 165.1 K [30].…”

mentioning

confidence: 99%

Effect of Ag addition on the thermal stability and glass-forming ability of Zr35Ti30Cu7.5Be27.5 bulk metallic glass

Zong

Zhang

et al. 2012

Chin. Sci. Bull.

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The thermal stability and glass forming ability (GFA) of Zr 35−x Ti 30 Cu 7.5 Be 27.5 Ag x (x = 0-10) alloys were studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and ultrasonic techniques. We found that the addition of 1 at.% Ag can considerably enhance the GFA as indicated by an increase in the critical glass dimension from 15 mm in the Zr 35 Ti 30 Cu 7.5 Be 27.5 alloy to 20 mm in the Zr 34 Ti 30 Cu 7.5 Be 27.5 Ag 1 alloy. However, with the addition of more Ag the supercooled liquid region (T x ) and  parameter (defined as T x /(T g +T l )) drastically decreased from 155 K and 0.436 to 76 K and 0.363, respectively, resulting in a decrease in the GFA. Additionally, the elastic constant (the ratio of shear modulus to bulk modulus or Poisson's ratio) was also used as a gauge to evaluate the GFA in Zr 35−x Ti 30 Cu 7.5 Be 27.5 Ag x alloys. bulk metallic glasses, glass forming ability, thermal stability, elastic properties Citation: Minor alloying addition or microalloying technology has proven to be an effective approach in promoting glass formation, enhancing thermal stability and improving the plasticity of BMGs [20][21][22]. It has been found that microalloying with proper alloying elements can dramatically improve the GFA of various BMGs [23][24][25]. Previous studies showed that the GFA of Cu-, Mg-and ZrCu-based bulk metallic glasses were significantly enhanced by adding Ag [26][27][28][29]. In this work, Ag was also chosen as the doping element in the Zr 35 Ti 30 Cu 7.5 Be 27.5 system, which had a critical diameter of about 15 mm and a wide supercooled liquid region of 165.1 K [30]. To investigate the elastic properties of the resultant ZrTi-based BMGs their acoustic velocities were measured at room temperature by a pulse echo overlap method.Zr 35-x Ti 30 Cu 7.5 Be 27.5 Ag x (x = 0, 1 at.%, 2 at.%, 3 at.%, 5 at.%, 7 at.%, 10 at.%) ingots were prepared by arc melting high purity ( 99.9 wt.%) constituents under a titanium gettered argon atmosphere. Each ingot was remelted at least four times to ensure chemical homogeneity. Cylindrical alloy rods with diameters of 3, 4, 15 and 20 mm were prepared by injection casting the remelted ingots into a copper mould under an argon atmosphere. The samples were then

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“…In the past decades, a number of BMGs with maximum diameter of at least 10 mm have been synthesized in many multi-component alloy systems. [1][2][3][4][5][6] Among the bulk glassforming alloys, Cu-based BMGs were recognized to be a promising structural materials due to relatively high strength, good ductility and low cost, and the maximum diameter is reported to be 10 mm for Cu 46 Zr 42 Al 7 Y 5 and Cu 44:25 Ag 14:75 -Zr 36 Ti 5 alloys. 2,7) It is well known that binary Cu 50 Zr 50 alloy has a good glass-forming ability (GFA).…”

Section: Introductionmentioning

confidence: 99%

Formation and Thermal Stability of Cu46.25Zr44.25Al7.5Er2 Bulk Metallic Glass with a Diameter of 12 mm

Men

Pang

et al. 2006

Mater. Trans.

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Discovering inch-diameter metallic glasses in three-dimensional composition space

Cited by 216 publications

References 24 publications

Structures at Glassy, Supercooled Liquid, and Liquid States in La-Based Bulk Metallic Glasses

Structures at Glassy, Supercooled Liquid, and Liquid States in La-Based Bulk Metallic Glasses

Effect of Ag addition on the thermal stability and glass-forming ability of Zr35Ti30Cu7.5Be27.5 bulk metallic glass

Formation and Thermal Stability of Cu<SUB>46.25</SUB>Zr<SUB>44.25</SUB>Al<SUB>7.5</SUB>Er<SUB>2</SUB> Bulk Metallic Glass with a Diameter of 12 mm

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