Structure and transformation behaviour of a rapidly solidified Al–Y–Ni–Co–Pd alloy

Louzguine-Luzgin, Dmitri V.; Inoue, Akihisa

doi:10.1016/j.jallcom.2005.02.018

Cited by 35 publications

(17 citation statements)

References 50 publications

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“…The small atomic size difference between Al and Pd does not favor the atomic packing, which may explain why the GFA decreases. 33 The addition of Pd to Mg 72 Zn 23 Ca 5 alloy also decreases the GFA, 53 as can be deduced from the diffraction patterns in Fig. 3.…”

Section: Addition Of Transition Elementsmentioning

confidence: 78%

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Role of minor additions on metallic glasses and composites

González

2015

J. Mater. Res.

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Microalloying refers to the addition of a small concentration of an alloying element to tune the properties of the parent alloy. Microalloying technology enables to control the glass formation and the mechanical properties of bulk metallic glasses (BMGs). This manuscript presents a comprehensive review on recent developments and breakthroughs in the field of microalloying for tuning the properties of BMGs and composites with focus on the results. The ability of multiple element coaddition to optimize the glass formation and the importance of future alloy developments have been highlighted. Proper microalloying can be used to tailor not only the mechanical properties of the amorphous phase but also those of the crystalline phase, which opens up the possibility for tuning the mechanical performance at different length scales. The effectiveness in controlling the mechanical performance through microalloying was shown to greatly depend on the alloy composition and closeness to the critical amorphous diameter. A tentative outlook commenting the potential and challenges of this exciting field of research is also presented.

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Section: Addition Of Transition Elementsmentioning

confidence: 78%

“…This sensitivity is either because their glass forming ability is relatively low and thus a small composition change can lead to crystallization [i.e., for Mg-Ni-RE, 31 Mg-Zn-Ca, 32 and Al-Ni-Co-Y 33 systems] or because the alloy system itself is very sensitive to minor additions (i.e., for Zr-Cu alloys).…”

Section: Introductionmentioning

confidence: 99%

Role of minor additions on metallic glasses and composites

González

2015

J. Mater. Res.

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“…This idea can be supported by the following observations. For example, the addition of 1 at% of Cu or Pd to Al-Y-Ni-Co alloy [86,87] or Cu to Al-Y-Fe alloys [88,89] drastically reduces their GFA and causes precipitation of the primary a-Al particles, while none of the other parameters such as (a) (b) Fig. 6 Pauling electronegativity En as a function of atomic radius of the element in absolute (a) and relative (b) values.…”

Section: Discussionmentioning

confidence: 99%

Role of different factors in the glass-forming ability of binary alloys

et al. 2014

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International audienceIn the present work, we discuss the glass-forming ability of various binary alloys in which the glassy phase was not formed even by melt spinning technique with high cooling rate of the melt up to 1 MK/s (some consisted of partly glassy phase), though by commonly accepted guidelines, these alloys could be as good glass-formers as many other binary glasses. The alloys studied belong to binary systems with multiple eutectics; the constituent elements have a negative enthalpy of mixing, and a significant variability of atomic size differences is observed from system to system. The results indicate the necessity of taking into account simultaneously various factors influencing the glass-forming ability including melt fragility

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“…RECENTLY, the synthesis of Al-RE-TM-based amorphous or nanocrystalline bulk materials have attracted unprecedented interest due to their high specific strength along with improved physical properties. [1][2][3][4][5][6] In general, the bulk amorphous or nanocrystalline material is synthesized by consolidation of pulverized melt-spun amorphous ribbons or gas-atomized amorphous powders in the size range of 10 to 20 lm. [7,8] The amorphization of Al-based alloys involves high cooling rate due to their low glass-forming ability compared to the other systems, e.g., Cu-, Zr-, and Fe-based alloys.…”

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confidence: 99%

Formation of Nanocrystalline Matrix Composite during Spray Forming of Al83La5Y5Ni5Co2

Srivastava

Surreddi

Uhlenwinkel

et al. 2009

Metall Mater Trans A

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In the present investigation, a multicomponent glass-forming Al 83 Y 5 La 5 Ni 5 Co 2 (at. pct) alloy was spray deposited on a copper substrate to produce an 8-mm-thick plate. The substrate was 30-mm thick and heated to a temperature of 160°C prior to spray deposition. The temperature of the substrate and the deposit was measured during and after deposition. The deposits as well as oversprayed powders were characterized in terms of the microstructural features by optical microscopy and scanning electron microscopy (SEM). The phase constitution and transformation were studied by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The oversprayed powder revealed different microstructural characteristics showing crystalline, partially crystalline, and fully featureless particles. The spray deposit showed large fraction of featureless regions with embedded dendrites of 1-to 10-lm size intermetallic phases. These regions were observed to have a nanocrystalline structure with an average grain size of approximately 100 nm. The XRD analysis also revealed the nanocrystallinity in terms of a halo and peak broadening. These microstructural features have been attributed to the deposition of undercooled liquid on a highly conductive copper substrate and rapid heat extraction from the droplets due to proper metallic contact between the deposit and the substrate. These results have been discussed in light of processing conditions and the microstructural evolution of droplets in flight and during deposition.

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Structure and transformation behaviour of a rapidly solidified Al–Y–Ni–Co–Pd alloy

Cited by 35 publications

References 50 publications

Role of minor additions on metallic glasses and composites

Role of minor additions on metallic glasses and composites

Role of different factors in the glass-forming ability of binary alloys

Formation of Nanocrystalline Matrix Composite during Spray Forming of Al83La5Y5Ni5Co2

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