Glass Transition Behavior of Al-Y-Ni and Al-Ce-Ni Amorphous Alloys

Inoue, Akihisa; Ohtera, Katsumasa; Tsai, A.‐P.; Kimura, Hisamichi; Masumoto, T.

doi:10.1143/jjap.27.l1579

Cited by 91 publications

(46 citation statements)

References 9 publications

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“…A larger DT x means a more stable supercooled liquid against crystallization and improved GFA. It has been observed that the Al-10Ce-Ni alloys show the higher thermal stability (T x : 500-730 K) than the Al-Ce10Ni alloys (402-620 K) [22,24]. This generally agrees with the better GFA and wider GFR (1-30 at% Ni) in the Al-10Ce-Ni alloys than that of the Al-Ce-10Ni alloys (2-10 at% Ce) [22,24].…”

Section: Gfa and The Heat Of Mixing For Liquidsupporting

confidence: 65%

“…Among the various Al-based Al-Ce-M (M ¼ Fe, Co, Ni or Cu) alloys, the Al-Ce-Ni system is unique, which can be synthesized into a strong, flexible metallic glass with the widest GFR covering 2-15 at% Ce and 1-30 at% Ni [21][22][23][24][25]. It was found that the GFA and the thermal stability in the Al-rich corner were enhanced by increasing the solute content and specifically the Ce content [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…It was found that the GFA and the thermal stability in the Al-rich corner were enhanced by increasing the solute content and specifically the Ce content [22][23][24]. Experimental results of the Al-Ce-Ni bulk amorphous alloys prepared with copper mold casting indicate that the amorphous sheets with 5 mm width and 0.2 mm thickness are obtained in Al 86 Ce 4 Ni 10 and Al 88 Ce 6 Ni 6 alloys without appreciable glass transition.…”

Section: Introductionmentioning

confidence: 99%

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Correlation between thermodynamics and glass forming ability in the Al–Ce–Ni system

Tang

Wang

et al. 2010

Intermetallics

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Section: Gfa and The Heat Of Mixing For Liquidsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation between thermodynamics and glass forming ability in the Al–Ce–Ni system

Tang

Wang

et al. 2010

Intermetallics

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“…It is therefore important to discuss the reason for the increase in ÁT x by the addition of the optimum B content (about 2 at%). As described above, the formation of a glassy phase in Al-Ni-Ce and Al-Ni-Y-Co systems has been interpreted 10,17) to result from the satisfaction of the three component rules, [18][19][20][21] i.e., (1) multi-component consisting of more than three elements, (2) significant atomic size mismatches above 12% among the main three elements, and (3) negative heats of mixing among their elements. The atomic size ratios of Al, Ce, Y, Ni and Co to B are 1.59, 2.03, 2.02, 1.39 and 1.39, 13) respectively.…”

Section: Discussionmentioning

confidence: 99%

Formation, Thermal Stability and Mechanical Properties of Aluminum-Based Glassy Alloys Containing Boron

et al. 2004

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Glassy type Al-based alloys, with a distinct glass transition and a supercooled liquid region before crystallization, were formed in (Al 0:84 Ni 0:1 Ce 0:06 ) 100Àx B x (x ¼ 0 to 10 at%) and (Al 0:84 Ni 0:05 Y 0:09 Co 0:02 ) 100Àx B x (x ¼ 0 to 3 at%) systems by melt spinning. The addition of an optimum amount of B was found to increase the temperature interval of supercooled liquid region from 18 K to 23 K at 6%B for the former system and from 28 K to 31 K at 1.5 and 2%B for the latter system. The similar increase with B content was also recognized for Vickers hardness (H v ) and tensile fracture strength ( f ) and the highest values of H v and f are 400 and 1060 MPa, respectively, at 6%B and 375 and 1140 MPa, respectively, at 1.5%B. The maximum phenomena of temperature interval of supercooled liquid region (ÁT x ¼ T x À T g ), H v and f at optimum B contents can be interpreted in the framework of the three empirical component rules for the stabilization of supercooled liquid and the formation of bulk glassy alloys. The crystallization occurs through two stages of glass ! Al + metastable phase ! Al + Al 3 Ni + Al 4 Ce for the Al-Ni-Ce-6%B alloy and through three stages of glass ! Al + glass ! Al + metastable phase + glass ! Al + Al 9 Co 2 + Al 3 Y + Al 4 NiY + Al-Y-Ni-Co quaternary compound for the Al-Ni-Y-Co-2%B alloy. The finding of Al-based glassy alloys with large ÁT x values above 30 K is encouraging for future development of Al-based alloys as a high strength material with light weight.

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“…Since rapidly solidified Al-based fully or partially amorphous alloys with high strength and good ductility were discovered in the late 1980s [1][2][3] , considerable effort has been expended to develop the A1-Ni-RE systems due to their good glass-forming capability [4`s] .…”

Section: Introductionmentioning

confidence: 99%

Devitrification process in rapidly solidified Al-Ni-Cu-Nd metallic glass

Yu-de

Jacovkis

et al. 2003

J Cent. South Univ. Technol.

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In the present study, rapidly solidified ribbons of Als7 NiT Cu3 Nd~ metallic glass was prepared by using melt spinning. Devitrification process of the totally amorphous ribbons was investigated by high temperature X-ray diffraction analysis, combining with differential scanning calorimetry, under continuous and isothermal heating regime. The X-ray diffraction intensity and full width at the half maximum (FWHM) were analyzed to investigate the increase of crystallized amount and growth of a-Al crystal particles. The results show that under continuous heating regime, the metallic glass devitrifies via two main stages: primary crystallization, resulting in two-phase mixture of a-Al plus residual amorphous phase, and secondary crystallization, corresponding to rapid precipitation of some inter-metallic phases in the form of dispersion or eutectic mixture. Under isothermal heating regime, only AI crystal precipitates from the Al-rich amorphous matrix at low temperature, and when heating at 280 *C only AI crystal precipitates within a short time, and then AIsCu4 Nd forms, followed by AI3 Ni, in the residual amorphous phase. When heating at higher temperature or for longer time, AI, Nda forms, the amorphous phase disappears, and the ribbons develop into polycrystalline morphologies with multiply phase mixture of a-Al, AIsCu4 Nd, AI3 Ni, and AI, Nd3.

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Glass Transition Behavior of Al-Y-Ni and Al-Ce-Ni Amorphous Alloys

Cited by 91 publications

References 9 publications

Correlation between thermodynamics and glass forming ability in the Al–Ce–Ni system

Correlation between thermodynamics and glass forming ability in the Al–Ce–Ni system

Formation, Thermal Stability and Mechanical Properties of Aluminum-Based Glassy Alloys Containing Boron

Devitrification process in rapidly solidified Al-Ni-Cu-Nd metallic glass

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