Iranian Journal of Materials Science and Engineering

• Optimization of SLM process parameters ensures the production of high-quality, mechanically robust maraging 300 alloy parts.
• Optimal energy density minimizes porosity and unmelted particles, resulting in improved density and strength.
• Heat treatment significantly enhances tensile strength through solution and aging processes.
• The stripe scanning strategy improves tensile strength and reduces porosity compared to alternative strategies.

 

• Synthesis of CuS nanoparticles (NPs) via wet chemical approach, with nanometer-scale dimensions. Comprehensive characterization revealing hexagonal phase structure confirmed by X-ray diffraction (XRD) and Raman spectroscopy.
• Estimated bandgap energy of 2.05 eV for slightly sulfur-rich CuS NPs, indicating miniaturization effect exhibited Exceptional photocatalytic activity of CuS NPs in degrading methyl Red (MR) under visible light.
• Surface-bound OH ions on CuS nanostructures enhance adsorption and acceleration of MR degradation under visible light. Significant promise and efficiency of CuS NPs highlighted as photocatalysts, particularly for purifying chemically contaminated wastewater.
• High responsiveness to stable visible light makes CuS NPs suitable for practical applications, especially in degrading stable azo dyes like MR.

 

Highlight

• Zirconia reinforcement significantly enhances compressive strength in GICs, with optimal performance at 8 wt.% loading.
• The acidic nature of zirconia promotes stronger interfacial bonding, contributing to improved matrix cohesion.
• Diopside, due to its basicity, shows limited interaction within the GIC matrix, resulting in no mechanical improvement
• Acid-base characteristics of filler are key determinants in tuning the mechanical performance of glass-ionomer cements.

AZ91 Mg alloy samples processed with 2 passes of ECAP (ECAP-2P) have relatively higher wear resistance than the as-received AZ91 Mg alloy
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Coefficient of friction of ECAP-2P sample was less than that of as-received Mg alloy because of strain hardening during sliding.
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wear morphology study indicates that the wear mechanisms include abrasion, delamination, plastic deformation, and oxidation
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The corrosion resistance of the ECAE-2P and ECAE-4P samples increased by 76.53% and 71.11%, respectively

• Optimization of SLM process parameters ensures the production of high-quality, mechanically robust maraging 300 alloy parts.
• Optimal energy density minimizes porosity and unmelted particles, resulting in improved density and strength.
• Heat treatment significantly enhances tensile strength through solution and aging processes.
• The stripe scanning strategy improves tensile strength and reduces porosity compared to alternative strategies.

 

HIGHLIGHTS

• CsPbI₃ properties of electronic, elastic, optical and population analysis using DFT.
• CsPbI₃ shows as a direct band gap crystal with minimum band gap is about 1.58 eV.
• The p and f orbital are the highest and lowest contribution of electronic state.
• Highest absorption points for CsPbI₃ occurred at the energy of 15.1 eV.
• The extinction and refractive index offered the principal peak in same energy level.

 

· A k-nearest neighbors regressor (KNNR) model accurately predicts aluminide coating thickness with a coefficient of determination (R²) of 0.78.
· SHAP analysis identifies Al, Si, and NH₄Cl content as the key factors that increase coating thickness, while ZrO₂ decreases it.
· Data-driven insights are explained by physical chemistry, linking higher NH₄Cl levels to an increased flux of Al-bearing transport species.
· Pack cementation yields superior coating thickness compared to gas-phase and out-of-pack methods, due to sustained Al availability.
· The model, built from a curated dataset of 103 points, serves as a powerful tool for guiding targeted experimental validation.

 

1- The addition of 10 wt% TiO₂ to the BaO-Al₂O₃-SiO₂ glass system resulted in a notable reduction in the glass transition temperature (from 781.6°C to 779.4°C) and softening point (from 838°C to 824.8°C), consequently decreasing the calculated nucleation temperature (from 810°C to 800°C).
2- Isothermal heat treatments at 1000°C led to the development of a multiphase crystalline assemblage in the TiO₂-containing glass that beneficially included the target monoclinic Ba_3.75Al_7.5Si_8.5O₃₂ phase, which was absent in the TiO₂-free glass. X-ray diffraction analysis confirmed the presence of this phase, along with celsian (BaAl₂Si₂O₈) polymorphs and barium titanate crystallites.
3-Dielectric characterization in the Ku-band (12.4-18 GHz) demonstrated significant property enhancements, with the relative permittivity decreasing from 10.40 to 6.38 and the loss tangent improving from 0.3 to 0.2 after crystallization.
4- These improvements in dielectric properties are attributed to the formation of the specifically tailored crystalline phase assemblage, including the desired Ba_3.75Al_7.5Si_8.5O₃₂ phase, and the controlled microstructure facilitated by TiO₂ addition.

 

Article Highlights

• PEG and curcumin for imparting surface hydrophilicity were introduced into SF/LN films.
• Bio interaction in the milieu of SF, LN, PEG, and curcumin was studied preparing for hydrogen bonding and molecular interactions, using Fourier-transform infrared spectroscopy.
• Reduction in the water contact angle by as much as 70% with the PEG-curcumin system implied drastically improved wettability.
• The Water uptake and NIH3T3 cells viability tests confirmed better fluid uptake and biocompatibility of PEG/Cur-modified SF/LN composites.
• The synergistic effect of PEG and curcumin is highly promising for advanced wound dressings and tissue scaffolds.

Highlights

• Tuning purity, wettability and surface roughness of supported fluorinated single layer graphene
• Tuning adhesive forces of supported fluorinated single layer graphene
• Insight gained by various analysis including Raman spectroscopy and novel surface roughness and adhesive force measurements
• Wettability tuning observed in graphene samples with various plasma power
• Substrate interaction with fluorine, saturation of the graphene and π-electron pairs played important roles in tuning of the wettability