Transient liquid-phase sintering using silver and tin powder mixture for die bonding

Fujino, Masataka; Narusawa, Hirozumi; Kuramochi, Yuzuru; Higurashi, Eiji; Suga, Tadatomo; Shiratori, Toshiyuki; Mizukoshi, Masataka

doi:10.7567/jjap.55.04ec14

Cited by 27 publications

(9 citation statements)

References 27 publications

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“…Also, in our previous study, the relative density and ultimate shear strength of the Fe–30Mn, Fe–30Mn–1Ag, and Fe–30Mn–3Ag alloys were measured as 71%, 80%, and 89% and 172, 360, and 490 MPa, respectively. The addition of Ag helped the sintering by forming liquid-phase sintering and by decreasing the porosities …”

Section: Results and Discussionmentioning

confidence: 99%

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In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

Bagha

Khakbiz

Sheibani

et al. 2020

ACS Biomater. Sci. Eng.

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The addition of noble elements such as Ag was shown as a successful method to accelerate the corrosion rate of absorbable Fe-based alloys. One major concern of Ag addition is its effect on hemocompatibility and biocompatibility. In this study, in vitro degradation and surface analysis of Fe-30Mn-xAg (x= 0, 1 and 3 wt.%) alloys as well as their effects on hemocompatibility and cell viability of human umbilical vein endothelial cells (HUVECs) were investigated. The static degradation rate of the alloys was 4.97, 4.69 and 4.49 mg/cm 2 for Fe-30Mn, Fe-30Mn-1Ag, and Fe-30Mn-3Ag, respectively. The surface analysis after degradation showed that γ-FeOOH was formed on Fe-30Mn-3Ag, while α-FeOOH was more dominant on Fe-30Mn and Fe-30Mn-1Ag. As γ-FeOOH is more soluble than α-FeOOH, it assists further degradation of Fe-30Mn-3Ag alloy. The high amount of Ag, induced hemolysis ratio however, inhibited coagulation by decreasing the platelet adhesion. Fe-30Mn-1Ag and Fe-30Mn-3Ag alloys shown improved cell viability compared to that of Fe-Mn alloy. Shear yield strength and shear elastic modulus of the samples after immersion tests were increased while the ultimate shear strength was not affected. Based on acceptable hemolysis rate, low platelet adhesion, acceptable cell viability, and appropriate mechanical properties after degradation Fe-30Mn-1Ag can be considered as a suitable blood-contacting Fe-based absorbable alloy.

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Section: Results and Discussionmentioning

confidence: 99%

“…The addition of Ag helped the sintering by forming liquid-phase sintering and by decreasing the porosities. 29 3.2. Static Immersion Test.…”

Section: Resultsmentioning

confidence: 99%

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

Bagha

Khakbiz

Sheibani

et al. 2020

ACS Biomater. Sci. Eng.

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“…2d). The addition of silver helped the SPS consolidation by promoting liquid phase sintering [31]. The melted silver pulled metal particles together and thus reduce pore formation [32] resulting in the increase of relative density to 93±2 % for the NS1A.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Design and characterization of nano and bimodal structured biodegradable Fe-Mn-Ag alloy with accelerated corrosion rate

Bagha

Khakbiz

Sheibani

et al. 2018

Journal of Alloys and Compounds

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Researchers in biodegradable metals have been putting efforts to accelerate the corrosion of ironbased biodegradable metals. These include by alloying iron with manganese and noble elements such as silver, but further increase to the corrosion rate is still needed. In this study, a set of bimodal nano/microstructured Fe-30Mn-1Ag alloys was prepared through mechanical alloying and spark plasma sintering. The alloys were characterized and tested for their corrosion behavior in Hanks' solution at 37 o C and for their mechanical properties. The bimodal-structured alloy possessed a mixture of austenitic (γ-FeMn) and ferritic (α-Fe) phases, while the nano-and macro-structured ones were essentially composed of γ-FeMn and α-Fe phases, respectively. Addition of 1-3 wt.% of silver into the nanostructured alloy increased its corrosion rate from 0.24 mm/year to 0.33 and 0.58 mm/year for Fe-30Mn-1Ag and Fe-30Mn-3Ag, respectively. Whilst, the bimodal Fe-30Mn-1Ag alloy corroded at a higher rate of 0.88 mm/year. This alloy also possessed an interesting combination of high and low micro-hardness phases that contributed to high shear strength of 417 MPa and shear strain of 0.66. Detailed discussion on the relationship of microstructure with corrosion behavior and mechanical properties is presented in this manuscript.

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“…At present, some TLPS systems have been reported, such as Sn-Bi-Ag, Ag-Sn, Cu-Sn, Ag-In, Ni-Sn, and so on (Ohnμma et al, 2012;Wu et al, 2012;Lee et al, 2015;Fujino et al, 2016;Tatsumi et al, 2019). For Cu-In TLPS system, the melting point of In (157°C) is lower than Sn (232°C), which enables the bonding process to be carried out at a lower temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Shear Property of Cu-In Transient Liquid Phase Sintering Joints

et al. 2021

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Transient liquid phase sintering (TLPS) is a promising joining technology that can achieve high temperature resistant solder joints at low temperature, showing excellent potential in power electronics. In this work, Cu/Cu-In/Cu solder joints were successfully prepared by TLPS process. The effects of bonding pressure and holding time on the microstructure and shear strength of Cu-In TLPS joints at 260 and 320°C were studied. The results showed that as bonding pressure increased from 0.1–0.6 MPa, the porosity decreased and shear strength increased significantly. No obvious change was found as bonding pressure continued to increase to 1 MPa. As holding time increased at 260°C, Cu11In9 was formed and gradually transformed to Cu2In that can withstand elevated temperature. Meanwhile, the porosity decreased while shear strength increased. It was calculated that volume expansion (12.74%) occurred during the phase transition from Cu11In9 to Cu2In. When bonding temperature increased to 320°C, only Cu2In was detected and then gradually transformed to Cu7In3 with the growing holding time. As holding time reached 120 min, their porosity increased and lead to weak shear strength due to volume shrinkage (15.43%) during the phase transition from Cu2In to Cu7In3.

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Transient liquid-phase sintering using silver and tin powder mixture for die bonding

Cited by 27 publications

References 27 publications

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

In Vitro Degradation, Hemocompatibility, and Cytocompatibility of Nanostructured Absorbable Fe–Mn–Ag Alloys for Biomedical Application

Design and characterization of nano and bimodal structured biodegradable Fe-Mn-Ag alloy with accelerated corrosion rate

Microstructure Evolution and Shear Property of Cu-In Transient Liquid Phase Sintering Joints

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