Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

Zagulyaev, D. V.; Ivanov, Yurii; Konovalov, S. V.; Abaturova, A. A.; Громов, В. Е.; Rubannikova, Yulia; Семин, А. П.

doi:10.1590/1980-5373-mr-2020-0057

Cited by 3 publications

(1 citation statement)

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“…This resulted in an increase in hardness values but lowered the strength of solder joints. Hardness and microhardness variations against various effects, such as contact potential difference or electric potential [ 16 ], and surface treatments, such as electron-plasma treatment [ 17 ], have also been investigated for different alloys.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Mechanical Properties of Mn-Alloyed Tin-Silver-Copper Solder Solidified with Different Cooling Rates

et al. 2020

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Manganese can be an optimal alloying addition in lead-free SAC (SnAgCu) solder alloys because of its low price and harmless nature. In this research, the mechanical properties of the novel SAC0307 (Sn/Ag0.3/Cu0.7) alloyed with 0.7 wt.% Mn (designated as SAC0307-Mn07) and those of the traditionally used SAC305 (Sn96.5/Ag3/Cu0.5) solder alloys were investigated by analyzing the shear force and Vickers hardness of reflowed solder balls. During the preparation of the reflowed solder balls, different cooling rates were used in the range from 2.7 K/s to 14.7 K/s. After measuring the shear force and the Vickers hardness, the structures of the fracture surfaces and the intermetallic layer were investigated by SEM (Scanning Electron Microscopy). The mechanical property measurements showed lower shear force for the SAC0307-Mn07 alloy (20–25 N) compared with the SAC305 alloy (27–35 N), independent of the cooling rate. However, the SAC0307-Mn07 alloy was softer; its Vickers hardness was between 12 and 13 HV, whereas the Vickers hardness of the SAC305 alloy was between 19 and 20 HV. In addition, structural analyses revealed rougher intermetallic compound layers in the case of the SAC0307-Mn07 alloy, which can inhibit the propagation of cracks at the solder–substrate interface. These two properties of SAC0307-Mn07 alloy, the softer nature and the rougher intermetallic layer, might result in better thermomechanical behavior of the solder joints during the lifetime of electronic devices.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Mechanical Properties of Mn-Alloyed Tin-Silver-Copper Solder Solidified with Different Cooling Rates

et al. 2020

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Effect of Two-Stage Surface Modification on the Structure of Al – 11% Si and Al – 20% Si Silumins

et al. 2023

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Structural and magnetic properties of ball-milled powders of (Fe1−xMnx)75P15C10 met-glass

et al. 2021

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This paper reports on the structural and magnetic properties of a ball-milled powder sample of (Fe1−xMnx)75P15C10 (x = 0, 0.05, 0.1, 0.2, and 0.3) mixed metallic amorphous ribbons. X-ray diffraction patterns of the as-made powder samples demonstrate a structural phase transition from amorphous to the nanocrystalline structure having a tetragonal (P) type structure. Field emission scanning electron microscopic micrographs show that the particles form a nanocrystalline structure presumably due to the stress relaxation upon ball milling the amorphous ribbons. The observed phase transformation and the changed magnetic properties, e.g., significant enhancement in the coercive field leading to magnetic hardness, are attributed to the controlled milling and Mn substitution in this mixed metallic alloy system, which is the novelty of this research work.

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Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

Cited by 3 publications

References 20 publications

Investigation of the Mechanical Properties of Mn-Alloyed Tin-Silver-Copper Solder Solidified with Different Cooling Rates

Investigation of the Mechanical Properties of Mn-Alloyed Tin-Silver-Copper Solder Solidified with Different Cooling Rates

Effect of Two-Stage Surface Modification on the Structure of Al – 11% Si and Al – 20% Si Silumins

Structural and magnetic properties of ball-milled powders of (Fe1−xMnx)75P15C10 met-glass

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