Spark plasma sintering of gas atomized AlNiYLaCo amorphous powders

Deng, Shanshan; Wang, D.J.; Luo, Qiang; Huang, Yongjiang; Shen, Jun

doi:10.1016/j.apt.2015.10.009

Cited by 17 publications

(13 citation statements)

References 14 publications

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“…[20] Many researchers have used SPS, which is one of the most advanced sintering techniques to synthesize Al-based bulk amorphous alloys and composites. [18,23,92,[100][101][102]112] SPS technique applies both uniaxial pressure and DC pulse current simultaneously. [113,114] Generation of joule heating, spark impact pressure, and arguably plasma waves accelerates the sintering process and consolidation is completed only few minutes.…”

Section: Consolidation Of Amorphous Powdersmentioning

confidence: 99%

“…[17][18][19][20][21][22] Many researchers have reported Al-based amorphous alloys with compression strength ranging from 700 to 1300 MPa fabricated by consolidating gas-atomized amorphous powders. [17,18,21,23] Although gas-atomized Al-based amorphous powders have been consolidated to full density, this technique of synthesizing amorphous powder is very complex and cost ineffective. In contrast, synthesis of amorphous powders via mechanical alloying method is comparatively cost effective without much complexity in operation.…”

mentioning

confidence: 99%

“…tensile and compressive strengths, wear resistance, hardness, etc., compared to conventional Al alloys. [6][7][8][9][10][11][12][13][18][19][20][21][22][23] Evolution of crystalline phases in the amorphous matrix greatly affects these mechanical properties. Detailed explanation on the tensile and compression strengths of Al-based glassy ribbons and bulk alloys synthesized via RSP and PM routes, various nanomechanical properties, and effect of crystalline-phase evolution in glassy matrix on these properties has been provided in Section 6.…”

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confidence: 99%

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Advances in Synthesis and Characterization of Aluminum‐Based Amorphous Alloys: A Review

Sahu,

Maurya,

Laha

2023

Adv Eng Mater

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Aluminum‐based glassy alloys and composites exhibit more than two times higher tensile and compressive strength and superior corrosion resistance compared to the conventional Al alloys. However, the low glass‐forming ability (GFA) of Al‐based glass‐forming compositions restricts the synthesis of large dimension Al‐based amorphous alloys. In contrast, powder metallurgy route leads to synthesis of higher‐dimension Al‐based metallic glasses and composites. A detailed review on the efforts made to improve the dimension and mechanical properties of the Al‐based glassy alloys and composites is essential to further develop these materials for industrial applications. Researchers aspiring to develop high‐strength light‐weight materials can be benefited from such a detailed review on Al‐based amorphous alloys and composites. In this review article, a holistic approach is made to understand the GFA, crystallization behavior, corrosion resistance, and mechanical and electronic properties of Al‐based glassy alloys and composites. The effects of various alloying elements on GFA and criteria to optimize Al‐based glass‐forming alloy composition are discussed. The crystallization behavior is discussed with phase‐separation and quenched‐in nuclei models. The effects of various crystalline phases in the amorphous matrix on corrosion resistance and mechanical and electronic properties are discussed in detail.

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Section: Consolidation Of Amorphous Powdersmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Advances in Synthesis and Characterization of Aluminum‐Based Amorphous Alloys: A Review

Sahu,

Maurya,

Laha

2023

Adv Eng Mater

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“…3.4.1 Role of Chemical Composition. Another important factor, which greatly influences the sintering behavior of metallic amorphous powders, is their chemical compositions ( Ref 4,12,13,24,32,34). The interesting outcome of the present work is that a higher number of components in the Al-TM-RE alloy system supplemented the devitrification phenomena as confirmed from the comparative study of XRD patterns of the 500°C-sintered Al 86 Ni 8 Y 6 , Al 86 Ni 6 Y 6 Co 2 and Al 86 Ni 6 Y 4.5 Co 2 La 1.5 shown earlier in Fig.…”

Section: Role Of Particle Morphologymentioning

confidence: 99%

“…However, the powder technology route, viz. mechanical alloying, and consecutive spark plasma sintering have stimulated a considerable progress in enhancing the various properties of Al-based glassy alloys (Ref [8][9][10][11][12][13]. Mechanical alloying offers bulk amount of powder synthesis with a large composition range without much restriction of phase diagram (Ref 14).…”

Section: Introductionmentioning

confidence: 99%

The Glassy Structure Formation and Phase Evolution in Mechanically Alloyed and Spark Plasma-Sintered Al-TM-RE Alloys

Maurya

Laha

2019

J. of Materi Eng and Perform

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5 alloy powders via mechanical alloying performed at 300 revolution per minute with ball-to-powder ratio of 15:1 and subsequently the devitrification tendency of 300°C and 500°C spark plasma-sintered bulk amorphous alloys. Mechanically alloyed .5 powders yielded nearly fully amorphous structure after 140, 170 and 200 h, respectively. The requirement of prolonged milling was attributed to the soft and ductile nature of aluminum with high stacking fault energy. Amorphous powders were consolidated via spark plasma sintering at 300 and 500°C by applying a constant pressure of 500 MPa. X-ray diffraction was performed on the 300-and 500°Csintered samples. XRD patterns of the 300°C-sintered alloys exhibited very-low-intensity nanocrystalline FCC-Al peak overlaying an amorphous hump evincing retention of a large amount of the amorphous phase. Enhanced devitrification tendency was reported in the 500°C-sintered alloys; however, a major difference in the devitrification tendency of the 500°C-sintered Al 86 Ni 8 Y 6 , Al 86 Ni 6 Y 6 Co 2 and Al 86 Ni 6 Y 4.5 Co 2 La 1.5 alloys was that the quinary alloy exhibited higher tendency of devitrification, which was also corroborated by performing HRTEM and analytical TEM experiment. This could be attributed to the higher probability of coupling of atoms by short-range atomic shuffling during spark plasma sintering. Vickers hardness, and relative density estimated via ArchimedesÕ principle, varied depending on the degree of free volume annihilation and crystallization during sintering.

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