Prof. LIU Xiaodi | Publications & Academic Profile | SinoGreenTech

Research Publications & English Decoded Briefs

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SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4466-3

Ultrasonic Vibration-Assisted Mechanical Coating of Cr Powders on 45 Steel for Superior Corrosion Resistance

Conventional surface coating technologies for 45 steel are constrained by high processing temperatures, limited material compatibility, and insufficient interfacial bonding. This study introduces ultrasonic vibration-assisted mechanical coating (UVAMC) as a low-temperature deposition route that mitigates these limitations. The process yields a chromium coating on 45 steel with a nanoscale elemental interdiffusion transition layer at the interface, achieving a bonding strength of 66.0 MPa. The coating delivers improved corrosion resistance in aggressive environments while preserving the substrate's original compressive and tensile strength. The method also demonstrates broad process adaptability, successfully depositing copper, aluminum, and 316 stainless steel powders, and forming complex shapes such as the "SZU" pattern. These results establish UVAMC as a viable surface functionalization strategy for metallic materials, combining efficient deposition with operational flexibility.

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SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3506-3

Self-supported partially crystallized nanoporous metallic glass for ultra-stable and efficient electrocatalytic hydrogen evolution

Metallic glasses (MGs) often suffer from sluggish hydrogen evolution reaction (HER) kinetics in neutral and alkaline media, with their catalytic performance predominantly confined to acidic environments. Herein, we reported a novel thermoplastic forming technique to fabricate a self-supported partially crystallized nanoporous Pt56.2Ni5.2Cu16.8P21.8 metallic glass (C-NPMG). The C-NPMG catalyst delivers ultralow overpotentials of 18.0 mV (0.5 M H2SO4), 42.2 mV (1 M KOH), and 88.0 mV (1 M phosphate-buffered saline (PBS)) at a current density of 10 mA cm−2, outperforming most state-of-the-art non-noble MGs and Pt-based benchmarks across all pH conditions. Notably, it maintains negligible performance decay for over 1000 h in alkaline electrolytes, showcasing superior stability. Experimental and computational analyses reveal that the enhanced HER activity arises from three synergistic effects: (1) the high-specific-surface-area nanoporous architecture that maximizes active site exposure; (2) the formation of crystallite-amorphous interfaces during partial crystallization, which lowers the energy barrier for H2 desorption; (3) the hierarchical super-hydrophilic and super-hydrophobic wettability of the C-NPMG, which optimizes mass transport and prevents electrolyte-induced corrosion. This work establishes a novel design paradigm for developing high-performance, pH-universal HER electrocatalysts by integrating structural nano-engineering and crystallite-amorphous phase synergy in metallic glass systems to overcome the trade-offs between performance and stability in electrochemical water splitting.

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SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-4028-5

Ultrasonic vibration enabled cold manufacturing of high thermal conductive Cu/Diamond composites

The escalating thermal management demands of modern electronics necessitate materials with superior thermal conductivity and matched thermal expansion. Cu/Diamond composites are promising, yet their fabrication typically requires extreme conditions (high temperature/pressure) or complex coating processes. This work introduces a one-step, heat-source-free cold manufacturing method using ultrasonic vibration to consolidate Cu/Diamond composites at room temperature and a low pressure of ~16 MPa within seconds. The applied pressure is reduced by 200–500 times, and the required temperature is only 20% of that used in conventional high-temperature high-pressure sintering. Direct metallurgical bonding at Cu-Cu interfaces and solid embedding of diamond particles in the Cu matrix are achieved, yielding a composite with a high yield strength of 150 MPa. The method enables a maximum diamond proportion of ~60%, resulting in a thermal conductivity exceeding 1043 W/(m·K) and a coefficient of thermal expansion below 10×10⁻⁶ K⁻¹. Complex shapes are readily fabricated, and heat dissipation tests demonstrate superior performance compared to commercial Al₂O₃ and AlN substrates. The loose preparation conditions and rapid processing confer significant industrial production potential.

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