Metallization of Al2O3 ceramic with Mg by friction stir spot welding

Sonomura, Hirosuke; Ozaki, Tomoatsu; Katagiri, K.; Hasegawa, Yukiko; Tanaka, Tsutomu; Kakitsuji, Atsushi

doi:10.1016/j.ceramint.2021.01.139

Cited by 12 publications

(2 citation statements)

References 16 publications

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“…Due to the positive Gibbs free energy, the reaction between bismuth and lead sulfate (zinc oxide) could not occur spontaneously as appropriately as the reduction of zinc oxide and zinc sulfate by iron powder. The result matched well with the reducibility of metals in the literature, − and manifest a high possibility to reduce lead sulfate with iron powder.…”

Section: Resultssupporting

confidence: 88%

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

Che

Zhang

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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Lead sulfate residue (LSR) is an important secondary lead resource also categorized as a hazardous waste, which has gained great attention in clean and sustainable utilization technology due to the shortage of primary resources and environmental pollution. The current methods for LSR treatment involve a potential environmental risk including emission of SO x gas and generation of waste acids and alkali. Herein, an environmentally friendly method is proposed for treating LSR, by which lead was reduced under ambient conditions via mechanical ball milling using iron powder as the reductant. The phase transformation of lead was analyzed by X-ray diffraction, scanning electron microscopy/energy-dispersive X-ray spectrometry, Fourier transform infrared, and X-ray photoelectron spectroscopy, revealing that the reduction time, rotation speed, mass ratio of ball to material (B/M), and iron powder dosage positively influenced the reduction of lead sulfate. The highest lead sulfate reduction efficiency of 99.9% was obtained under optimum conditions: rotation speed of 300 rpm, reduction time of 2 h, B/M of 15 g/g, and 1.5 times the theoretical dosage of iron powder. The generated ferrous sulfate was subsequently removed by water washing, and excess iron powder was separated by melting, accompanied by metallic lead produced with a high purity of 99.2%. This process is simple and environmentally friendly, showing good potential for industrial application.

show abstract

Section: Resultssupporting

confidence: 88%

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

Che

Zhang

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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“…However, two main challenges exist in the jointing process. Firstly, the excellent chemical stability leads to low diffusion coefficient or weak reactions between sapphire and most materials including TC4 alloy 8 . Secondly, the difference in the thermal expansion coefficient between sapphire and TC4 causes severe residual stress at the interface 9 …”

Section: Introductionmentioning

confidence: 99%

Heterogeneous material joining of sapphire and TC4 alloy with a functionally graded interface

Zhu

et al. 2022

Int J Applied Ceramic Tech

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The natural high brittleness of sapphire leads to its poor machinability, which limits its application shape and size. The connection between sapphire and metal provides a new method to prepare large‐size sapphire components and complex structural parts. In this study, sapphire and TC4 alloy were joined by spark plasma sintering (SPS) diffusion technology with Al2O3‐Ti as interlayer fillers. The effects of filler composition, sintering temperature, microstructure, and phase distribution on the strength of the joint were explored. The results showed that sapphire and TC4 could be well connected by SPS with Al2O3‐Ti fillers. The microstructure of the joint showed no obvious defect or element enrichment. The optimized shear strength of sapphire/interlayer(Al2O3‐Ti)/TC4 joint reached 121 MPa, and the fracture path mode was sapphire‐interlayer‐TC4, indicating the strong bonding between the heterogeneous materials. The sapphire/interlayer(Al2O3‐Ti)/TC4 structure could relieve the residual stress caused by the difference in the thermal expansion coefficient in direct connection between sapphire and TC4.

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Application of Ag-Cu-Ti active metal composite filler in ceramic joining: a review

Li,

Wang,

Shen

et al. 2023

Front. Mater. Sci.

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Metallization of Al2O3 ceramic with Mg by friction stir spot welding

Cited by 12 publications

References 16 publications

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

A Facile and Environmentally Friendly Approach for Lead Recovery from Lead Sulfate Residue via Mechanochemical Reduction: Phase Transformation and Reaction Mechanism

Heterogeneous material joining of sapphire and TC4 alloy with a functionally graded interface

Application of Ag-Cu-Ti active metal composite filler in ceramic joining: a review

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