The Ti-Al-Si composite coatings were effectively fabricated on Ti6Al4V (TC4) substrates via coaxial powder feeding laser cladding technology. This study systematically investigated the influence of in situ synthesized Ti-Si ceramic reinforcement phases and Si content on the microstructure, microhardness, and wear resistance of the composite coatings. An excellent metallurgical bond between the coating and the substrate can be formed during the cladding coating process. When the temperature of the molten pool drops, the Ti and Si elements in situ react to form a Ti₅Si₃ ceramic reinforced phase originating from the Si-rich zone in the liquid phase. The microhardness of the cladding coatings exhibits a positive correlation with increasing Si content, reaching a maximum value of 820.83 HV. The in situ synthetic Ti₅Si₃ ceramic reinforced phases can effectively improve the coating’s wear resistance. Notably, the laser cladding coating with 25 wt% Si content exhibits the lowest wear weight loss rate of 0.140 mg·min⁻¹ and the lowest average friction coefficient of 0.412. Analysis of the wear mechanism reveals a combination of adhesive wear and microscopic wear characteristics.

This study systematically investigated the influence of Te content (0.18, 0.4, and 0.57 wt%) and aging treatment on the mechanical strength and electrical conductivity of Cu‐ x Te‐0.3Cr alloys ( x  = 0.18, 0.4, and 0.57 wt%). After controllled aging at 300°C–550°C for 1 h, the alloys developed a tailored multiscale microstructure consisting of nanoscale Cr precipitates, microscale Cr phases, bar‐shaped secondary Cu ₂ Te dispersoids, and dense dislocation networks. This hierarchical microstructure integrates precipitates across nanometer to micrometer scales, dislocation configurations, and grain status, collectively governing the alloy's strength‐conductivity synergy. The results revealed that increasing Te content significantly promoted the formation of Cu ₂ Te precipitates, with the quantity and size of these phases exhibiting a strong dependence on Te content. The aging process further induced dense dislocation networks and refined the precipitates, thereby facilitating synergistic strengthening mechanisms. Peak performance was achieved in the Cu‐0.4Te‐0.3Cr alloy after aged at 500°C for 1 h, which attained a Vickers hardness of HV 147 and an electrical conductivity of 85.58% IACS. These enhancements are attributed to the synergistic effects of precipitation strengthening (from coherent nanoscale Cr precipitates and Cu ₂ Te dispersoids) and dislocation pinning. This combination effectively impedes dislocation motion while reducing lattice distortion to maintain electron transport efficiency. This work provides a strategic framework for designing high‐performance Cu‐Te‐Cr alloys with optimized strength‐conductivity synergy via tailored multiscale microstructures, thereby advancing their application potential in demanding scenarios such as high‐current connectors for next‐generation energy technologies.

Developing efficient non-precious electrocatalysts for the hydrogen evolution reaction (HER) is crucial to advancing scalable green hydrogen generation. Herein, vertically aligned TiO₂ nanotube arrays were directly grown on Ti substrates via electrochemical anodization and subsequently employed as a scaffold for the in situ hydrothermal growth of MoS₂ nanosheets. Among the investigated electrodes, MoS₂/TNT-2 exhibits the best electrochemical HER performance, achieving a current density of 10 mA cm⁻² at an overpotential of 353 mV in 1 M KOH. Moreover, the electrode maintains good electrochemical stability during a 24 h chronoamperometric test and after 2000 cyclic voltammetry sweeps. This work provides a facile route for constructing self-supported MoS₂/TiO₂ heterostructured electrodes for alkaline HER.