Production of Ni-Pd-Si and Ni-Pd-P amorphous wires and their mechanical and corrosion properties

Inoue, Akihisa; Masumoto, Y.; Yano, N.; Kawashima, A.; Hashimoto, Kôji; Masumoto, T.

doi:10.1007/bf00555903

Cited by 23 publications

(10 citation statements)

References 14 publications

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“…27 EXAFS backscattering factors needed to calculate the model EXAFS curves were obtained by the FEFF8. 4 program. 28 The simulation boxes contained 20 250 atoms.…”

Section: Reverse Monte Carlo Simulationmentioning

confidence: 99%

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Atomic structure of glassyMg60Cu30Y10investigated with EXAFS, x-ray and neutron diffraction, and reverse Monte Carlo simulations

et al. 2007

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“…27 EXAFS backscattering factors needed to calculate the model EXAFS curves were obtained by the FEFF8. 4 program. 28 The simulation boxes contained 20 250 atoms.…”

Section: Reverse Monte Carlo Simulationmentioning

confidence: 99%

“…4 The thermal and mechanical properties of amorphous and partly crystalline Mg 60 Cu 30 Y 10 have been presented recently. [5][6][7] A particularly interesting property of Mg-based bulk metallic glasses is their excellent microforming ability.…”

Section: Introductionmentioning

confidence: 99%

Atomic structure of glassyMg60Cu30Y10investigated with EXAFS, x-ray and neutron diffraction, and reverse Monte Carlo simulations

et al. 2007

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“…A clear correlation between the GFA and the value of ⌬T is obtained in the newly found bulk metallic glasses ͑BMGs͒, such as Ln-Al-TM, Mg-Ln-TM, Zr-Al-TM, Ti-Zr-TM, and Zr-Ti-TM-Be ͑Ln: lanthanide metal, TM: transition metal͒ systems. [1][2][3][4]8 However, it seems that these empirical criteria are not applicable to the Nd-Fe-Al and Pr-Fe-Al BMGs. [9][10][11] Neither distinct glass transition nor supercooled liquid region is observed in their differential scanning calrimetry ͑DSC͒ traces, though the glassy samples with cross section up to 12 mm can be obtained by suction casting.…”

mentioning

confidence: 99%

Nd 65 Al 10 Fe 25−x Co x (x=0,5,10) bulk metallic glasses with wide supercooled liquid regions

Wei

Zhang

Zhuang

et al. 2001

Journal of Applied Physics

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Bulk metallic glasses of Nd 65 Al 10 Fe 25Ϫx Co x ͑xϭ0,5,10͒ have been prepared in the form of 3 mm diam rods. Results of differential scanning calrimetry, dynamic mechanical thermal analysis ͑DMTA͒, and x-ray diffraction are presented for these alloys. It is shown that the glass transition and crystallization have been observed by DMTA. The reduced glass transition temperature of these glasses, defined as the ratio between the glass transition temperature T g and the melting temperature T l is in the range from 0.55 to 0.62. All these glasses have a large supercooled liquid region ͑SLR͒, ranging from 80 to 130 K. The high value of reduced glass transition temperature and wide SLR agree with their good glass formation ability. Recently, a number of multicomponent alloys with excellent glass forming ability ͑GFA͒ have been reported. [1][2][3][4] These alloys require a critical cooling rate of 100 K/s or less for the glass formation, whereas conventional glassy alloys require a critical cooling rate of 10 3 -10 6 K/s with the exception of certain noble metal based alloys. 5,6 Various criteria have been proposed to reflect the GFA in the alloys in previous studies. Turnbull proposed that the reduced glass transition temperature T rg , defined as the ratio between the glass transition temperature T g and the melting temperature T l , could be used to evaluate the GFA of an alloy, and a higher value of T rg favors the glass formation. 7 This empirical criterion is in good agreement with the observations of previous and recent glass-forming alloys. Inoue and Masumoto adopted the temperature interval ⌬TϭT x1 ϪT g as a measure of the stability of the undercooled liquid above T g . A clear correlation between the GFA and the value of ⌬T is obtained in the newly found bulk metallic glasses ͑BMGs͒, such as Ln-Al-TM, Mg-Ln-TM, Zr-Al-TM, Ti-Zr-TM, and Zr-Ti-TM-Be ͑Ln: lanthanide metal, TM: transition metal͒ systems. [1][2][3][4]8 However, it seems that these empirical criteria are not applicable to the Nd-Fe-Al and Pr-Fe-Al BMGs. 9-11 Neither distinct glass transition nor supercooled liquid region is observed in their differential scanning calrimetry ͑DSC͒ traces, though the glassy samples with cross section up to 12 mm can be obtained by suction casting. The T g is then thought to be higher than the crystallization temperature T x , and the T rg is evaluated to be as high as 0.90 for the Nd 70 Fe 20 Al 10 and 0.85 for Nd 60 Fe 30 Al 10 alloys, respectively. The exceptional T rg does not reflect their practical GFA, and the absence of obvious supercooled liquid region in Nd-based metallic glasses is different from all BMGs reported so far. In this work, Nd 65 Al 10 Fe 25Ϫx Co x alloys have been prepared by chill casting. Dynamic mechanical thermal analysis ͑DMTA͒ combined with DSC and x-ray diffraction ͑XRD͒ were used to study the glass transition and thermal stability of these BMGs. The factors reflecting the GFA of these alloys were discussed.Ingots with compositions Nd 65 Al 10 Fe 25Ϫx Co x ͑xϭ0, 5,10͒ were prepared by ar...

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“…This correlation has been confirmed in many experiments [6]. Inoue and Masumoto adopted the temperature difference ⌬T x between T g and the first crystallization event (T x ) upon heating at a constant rate as a measure for the stability of the supercooled liquid above T g [4]. It has been demonstrated that larger values of ⌬T x tend to be correlated with lower values of the critical cooling rate R c necessary for glass formation for some bulk metallic glass-forming (BMG) systems, such as Ln-Al-TM, MgLn-TM, Zr-Al-TM, Ti-Zr-TM and Zr-Ti-TMBe (Ln: lanthanide metal, TM: transition metal) systems [7,8].…”

Section: Introductionmentioning

confidence: 61%

“…The estimation of the GFA in metallic alloy systems is of special importance as it can provide guidelines for the production of metallic glasses, especially in bulk form. Various empirical criteria have been proposed to reflect the GFA of alloys in previous studies [1][2][3][4][5]. Turnbull proposed that the reduced glass transition temperature T rg , defined as the glass transition temperature T g divided by the liquidus temperature T l , could be regarded as a measure to evaluate the GFA of an alloy [1].…”

Section: Introductionmentioning

confidence: 99%

Anomalous thermal stability of Nd–Fe–Co–Al bulk metallic glass

et al. 2002

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The thermal stability of Nd 60 Fe 20 Co 10 Al 10 bulk metallic glass (BMG) has been studied by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), isochronal dilatation and compression tests. The results show that the glass transition of the BMG takes place quite gradually between about 460 and 650 K at a heating rate of 0.17 K/s. Several transformation processes are observed during continuous heating with the first crystallization process beginning at about 460 K, while massive crystallization takes place near the solidus temperature of the alloy. The positive heat of mixing between the two major constituents, Nd and Fe, and, consequently, a highly inhomogeneous composition of the attained amorphous phase are responsible for the anomalous thermal stability in this system. 

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Production of Ni-Pd-Si and Ni-Pd-P amorphous wires and their mechanical and corrosion properties

Cited by 23 publications

References 14 publications

Atomic structure of glassyMg60Cu30Y10investigated with EXAFS, x-ray and neutron diffraction, and reverse Monte Carlo simulations

Atomic structure of glassyMg60Cu30Y10investigated with EXAFS, x-ray and neutron diffraction, and reverse Monte Carlo simulations

Nd 65 Al 10 Fe 25−x Co x (x=0,5,10) bulk metallic glasses with wide supercooled liquid regions

Anomalous thermal stability of Nd–Fe–Co–Al bulk metallic glass

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