New criterion of glass forming ability for bulk metallic glasses

Du, Xueyan; Huang, J.C.; Liu, Chang; Lu, Z. P.

doi:10.1063/1.2718286

Cited by 157 publications

(87 citation statements)

References 29 publications

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“…10 On the one hand, according to FVM, the smaller free volume of liquid results in higher liquid viscosity 8,9 and therefore lower atomic mobility, as well as the more stabilized liquid phase. [1][2][3][4][5][6][7][21][22][23] On the other hand, the glass forming liquid with a smaller free volume has a smaller entropy of fusion and consequently smaller gradient in DG (Gibbs free energy difference between the super-cooled liquid and the crystal) at the melting point, which results in a lower driving force for crystallization and therefore a greater GFA. 3,4,22 In short, the viscosity and DG, the two dominant factors of GFA, are related to each other via the free volume of liquid.…”

Section: Resultsmentioning

confidence: 99%

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Characteristic free volumes of bulk metallic glasses: Measurement and their correlation with glass-forming ability

Zeng

2011

Journal of Applied Physics

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Construction of a disorder variable from Steinhardt order parameters in binary mixtures at high densities in three dimensions J. Chem. Phys. 135, 174109 (2011) Fragility of iron-based glasses Appl. Phys. Lett. 99, 161902 (2011) Communication: Are metallic glasses different from other glasses? A closer look at their high frequency dynamics J. Chem. Phys. 135, 101101 (2011) Temperature dependence of the thermoplastic formability in bulk metallic glasses J. Appl. Phys. 110, 043518 (2011) The electronic structure origin for ultrahigh glass-forming ability of the FeCoCrMoCBY alloy system J. Appl. Phys. 110, 033720 (2011) Additional information on J. Appl. Phys. A convenient method is proposed for the measurement of the characteristic free volumes, viz., the amount of excess free volume annihilation in structural relaxation V f-sr and the amount of new free volume production in glass transition V f-gt of bulk metallic glasses (BMGs) by thermal dilation (DIL) test. Through the DIL tests, the characteristic free volumes are found to be sensitive to the change of glass forming ability (GFA). The Pd 40 Cu 30 Ni 10 P 20 BMG has a quite small V f-sr . For a series of Fe-Cr-Mo-C-B-(Er) BMGs, Fe 48 Cr 15 Mo 14 C 15 B 6 Er 2 with the largest GFA is identified to have the largest V f-gt and smallest V f-sr . The correlation between V f-sr and the squares of critical diameters of these iron-based BMGs can be fitted as a negative exponential function with high accuracy.

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Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5] A glass forming liquid or amorphous solid with higher density compared to their crystalline counterpart is found to have higher GFA. 6,7 This phenomenon can be explained by Cohen and Turnbull's free volume model (FVM).…”

Section: Introductionmentioning

confidence: 99%

Characteristic free volumes of bulk metallic glasses: Measurement and their correlation with glass-forming ability

Zeng

2011

Journal of Applied Physics

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“…For multicomponent metallic glasses the measure of  has been reported to be more accurate than T rg [17]. To improve this  parameter, Du et al had also considered T x in addition of T x and T l and proposed  m [18].…”

Section: Resultsmentioning

confidence: 99%

Glass-formation and corrosion properties of Fe–Cr–Mo–C–B glassy ribbons with low Cr content

Madinehei

Bruna

Duarte

et al. 2014

Journal of Alloys and Compounds

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The effect of low amounts of Cr on glass forming ability and corrosion behavior of Fe (65-x) Cr x Mo 14 C 15 B 6 (x=0, 2, 4, 6, 8, 10 at.%) ribbons have been studied. It was found that the reduced glass transition temperature (T rg ) do not change significantly with Cr content. The glass forming ability (GFA) of this system is evaluated by the  m ,  and  parameters and the alloys containing 4 and 6 at.% were found to be the best glass formers in this system. The temperature interval of the supercooled liquid region (∆T x ) changed with Cr and was enlarged from 35 K at x=0 to 50 K at x=4. Corrosion rates measured by immersion tests in H 2 SO 4 decreased with an increase of chromium content in the alloys. The electrochemical measurements indicate that the alloys containing more than 4 at.% of Cr are spontaneously passivated with low current densities in 0.1 N H 2 SO 4 whereas the alloys with Cr content < 4 at.% showed active behavior. In view of these results, the optimal amount of Cr addition in Fe-Mo-C-B amorphous steels is discussed.

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“…The most widely used indicators are T rg , DT x , and c. In a recent work, Guo et al 10 evaluated these criteria using statistical and physical considerations and found the best indicator of the GFA for the c m criterion. 5 The biggest short coming, however, is that they cannot predict new compositions, since they make use of thermal properties of the glassy state. Therefore, the forecast of GFA is impossible.…”

Section: Introductionmentioning

confidence: 99%

“…Several parameters to evaluate the glass-forming ability (GFA) have been proposed over the years based on thermal behavior, such as T rg (¼ T g /T l ), 1 5 /[¼ T rg (DT x /T g ) 0.143 ], 6 b[¼ T x T g /(T l ÀT x ) 2 ], 7 a(¼ T x /T l ) 8 and x[¼ T g /T x À2T g /(T g þT l )], 9 where T x , T l , and T g are the onset crystallization, liquidus and glass transition temperatures, respectively. The most widely used indicators are T rg , DT x , and c. In a recent work, Guo et al 10 evaluated these criteria using statistical and physical considerations and found the best indicator of the GFA for the c m criterion.…”

Section: Introductionmentioning

confidence: 99%

Prediction of good glass formers in the Al-Ni-La and Al-Ni-Gd systems using topological instability and electronegativity

Gargarella

Oliveira

Kiminami

et al. 2011

Journal of Applied Physics

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Surface rippling on bulk metallic glass under nanosecond pulse laser ablation Appl. Phys. Lett. 99, 191902 (2011) Construction of a disorder variable from Steinhardt order parameters in binary mixtures at high densities in three dimensions J. Chem. Phys. 135, 174109 (2011) Fragility of iron-based glasses Appl. Phys. Lett. 99, 161902 (2011) Communication: Are metallic glasses different from other glasses? A closer look at their high frequency dynamics J. Chem. Phys. 135, 101101 (2011) Temperature dependence of the thermoplastic formability in bulk metallic glasses J. Appl. Phys. 110, 043518 (2011) Additional information on J. Appl. Phys. A new criterion has been recently proposed combining the topological instability (k criterion) and the average electronegativity difference (De) among the elements of an alloy to predict and select new glass-forming compositions. In the present work, this criterion (k.De) is applied to the Al-Ni-La and Al-Ni-Gd ternary systems and its predictability is validated using literature data for both systems and additionally, using own experimental data for the Al-La-Ni system. The compositions with a high k.De value found in each ternary system exhibit a very good correlation with the glassforming ability of different alloys as indicated by their supercooled liquid regions (DT x ) and their critical casting thicknesses. In the case of the Al-La-Ni system, the alloy with the largest k.De value, La 56 Al 26.5 Ni 17.5 , exhibits the highest glass-forming ability verified for this system. Therefore, the combined k.De criterion is a simple and efficient tool to select new glass-forming compositions in Al-Ni-RE systems.

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New criterion of glass forming ability for bulk metallic glasses

Cited by 157 publications

References 29 publications

Characteristic free volumes of bulk metallic glasses: Measurement and their correlation with glass-forming ability

Characteristic free volumes of bulk metallic glasses: Measurement and their correlation with glass-forming ability

Glass-formation and corrosion properties of Fe–Cr–Mo–C–B glassy ribbons with low Cr content

Prediction of good glass formers in the Al-Ni-La and Al-Ni-Gd systems using topological instability and electronegativity

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