Effects of ultrahigh pressure on the crystallization temperature of Ni80P20 amorphous alloys

Imura, Toru; Suwa, Masaki; Fujii, Kazutoshi

doi:10.1016/0025-5416(88)90051-1

Cited by 31 publications

(15 citation statements)

References 2 publications

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“…So, the value of g can be estimated according to equation (5). For Se, g is estimated to be around 0.03 J/m 2 , which is very close to the solid/liquid interface energy (about 0.021 J/ m 2 ) [19].…”

Section: Discussionmentioning

confidence: 99%

Pressure effect on polymorphous crystallization kinetics in amorphous selenium

1998

Acta Materialia

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Section: Discussionmentioning

confidence: 99%

Pressure effect on polymorphous crystallization kinetics in amorphous selenium

1998

Acta Materialia

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“…This value is larger than those reported for metallic glasses with no wide supercooled liquid range, where dT x /dp ϳ0 -20 K/GPa. [8][9][10][11][12][13][14] In the range from 2.4 to 3.9 GPa, a minimum in T x was detected at a pressure of 3.2 GPa. With a further increase of pressure, the T x is independent of the external pressure.…”

confidence: 98%

Pressure effect on crystallization of metallic glass Fe72P11C6Al5B4Ga2 alloy with wide supercooled liquid region

Jiang

Olsen²,

Gerward

et al. 2000

Journal of Applied Physics

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The effect of pressure on the crystallization behavior of metallic glass Fe72P11C6Al5B4Ga2 alloy with a wide supercooled liquid region has been investigated by in situ high-pressure and high-temperature x-ray diffraction measurements using synchrotron radiation. In the pressure range from 0 to 2.4 GPa, the crystallization temperature, Tx, increases with pressure, p, having a slope of 30 K/GPa while a minimum in Tx was detected in the range from 2.4 to 3.9 GPa. With a further increase of p, Tx is independent of p. The Tx vs p behavior can be qualitatively explained by the suppression of atomic mobility and changes of the Gibbs free energy of various phases with pressure.

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“…That is, the crystallization is promoted under HP. In most amorphous alloys, however, it was found that HP suppresses the crystallization manifested by an evident increase in T x [11][12][13][14][15], and the enhanced thermal stability was attributed to the pressure inhibition of long-range atomic diffusion Intensity (a.u.) during crystallization [15].…”

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confidence: 99%

Melting and crystallization of Nd₆₀Al₁₀Fe₂₀Co₁₀bulk metallic glass under high pressure

Zhao

Pan

Wang

et al. 2003

J. Phys.: Condens. Matter

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Crystallization, melting and structural evolution upon crystallization in Nd 60 Al 10 Fe 20 Co 10 bulk metallic glass (BMG) are in situ investigated by x-ray diffraction with synchrotron radiation under high pressure. It is found that the crystallization is pressure promoted, while the melting is inhibited. The crystallization and melting process are also changed under high pressure. The features of the crystallization and melting under high pressure are discussed.Nd-based bulk metallic glasses (BMGs) with hard magnetic properties and the anomalous crystallization behaviour [1][2][3][4][5] have evoked intensive interest. Previous works show that the magnetic property of a BMG is very sensitive to the microstructure of the alloy, and crystallization can cause markedly changes of the thermal and magnetic properties [1][2][3][4][5]. In previous work, it has been found that an intermediate product involving the formation of metastable phases has been found in the crystallization process, the hard magnetic property of the BMG is related to the formed intermediate phases which are kinetically favourable in the supercooled melt prior to the crystallization [5]. It is also found that the Nd-based BMG can actually be regarded as a type of clustered amorphous material [2,5]. The direct evidence is that the HRTEM image of as-cast BMG exhibits a large numbers of nano-scale ordered regions dispersed in the glassy matrix, and the volume fraction is as large as 50% [5]. Clustered BMG exhibits hard magnetism while a ribbon sample without clustered structure is magnetically soft [3,5]. Furthermore, the BMG has no obvious glass transition in its differential scanning calorimetry (DSC) scans which is a common feature for other BMGs. High pressure (HP), which can cause a larger change of atom spacing, chemical bonding and Gibbs free energy, has been found to be a powerful tool for affecting and controlling the crystallization in the metallic

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Effects of ultrahigh pressure on the crystallization temperature of Ni80P20 amorphous alloys

Cited by 31 publications

References 2 publications

Pressure effect on polymorphous crystallization kinetics in amorphous selenium

Pressure effect on polymorphous crystallization kinetics in amorphous selenium

Pressure effect on crystallization of metallic glass Fe72P11C6Al5B4Ga2 alloy with wide supercooled liquid region

Melting and crystallization of Nd₆₀Al₁₀Fe₂₀Co₁₀bulk metallic glass under high pressure

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Effects of ultrahigh pressure on the crystallization temperature of Ni80P20 amorphous alloys

Cited by 31 publications

References 2 publications

Pressure effect on polymorphous crystallization kinetics in amorphous selenium

Pressure effect on polymorphous crystallization kinetics in amorphous selenium

Pressure effect on crystallization of metallic glass Fe72P11C6Al5B4Ga2 alloy with wide supercooled liquid region

Melting and crystallization of Nd60Al10Fe20Co10bulk metallic glass under high pressure

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Melting and crystallization of Nd₆₀Al₁₀Fe₂₀Co₁₀bulk metallic glass under high pressure