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2 2025

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Bonding mechanism between the AlN ceramic matrix and the copper-based metal cladding layer

Wang Song, Lu Hao, Shu Fengyuan, Zhang Xin, Li Guibian

Materials Science Poland

2025

Vol. 43, No. 1

42--50

High-temperature brazing and laser cladding methods can form a good metallurgical bond between ceramics and copper cladding. Herein, through these two methods, the preparation of a Cu-based metal cladding layer on the surface of aluminum nitride (AlN) ceramics was carried out. Scanning electron microscopy, X-ray diffraction, energy-dispersive spectroscopy, and other characterization techniques were employed to observe the macroscopic and microscopic morphologies, elemental distribution, and microstructure characteristics of Cu-based metal coatings and transition layers, in order to analyze the interface bonding mechanism. Research has found that the active element titanium (Ti) has a significant promoting effect on the wettability of Cu powder on the surface of ceramics. Metallurgical reactions occur at the interface between ceramics and Cu-based metal coatings. Al and N elements in ceramics react with most of the Ti in the metal coating and Cu in the molten metal also reacts with Ti, generating new compounds, thereby forming a metallurgical bond between ceramics and Cu coatings.

From Waste to Resource: Upcycling PET into High-Performance MOFs for Advanced Applications

Ma Rumeng, Wang Song

Green Sciences

2025

Vol. 27, nr 3

10--23

Due to the non-degradable nature of polyethylene terephthalate (PET) and the widespread use in food packaging, clothing, and other fields of PET, discarded PET waste continues to accumulate globally, posing significant risks to both the environment and human health. Through chemical recycling methods, PET waste can be decomposed into terephthalic acid (TPA), which serves as an organic linker of metal-organic frameworks (MOFs) and demonstrates potential for achieving PET waste upcycling, thus garnering considerable attention. MOFs prepared from PET waste have been extensively applied in fields such as adsorption, catalysis, and energy storage. This review aims to analyze the latest research advancements concerning the MOFs prepared from PET waste to provide insights for further development in both the preparation and application of MOFs prepared from PET waste. The comprehensive analysis of this review highlights the innovative pathways toward addressing environmental challenges while enhancing the utility of recycled resources.