Exploring the potential of nano technology: A assessment of nano-scale multi-layered-composite coatings for cutting tool performance

This study explored the impact of varying weight percentages of TiMoVWCr high-entropy alloy (HEA) powder addition on A356 composites produced using friction stir processing (FSP). Unlike previous research that often focused on singular aspects, such as mechanical properties, or microstructural analysis, this investigation systematically examined the multifaceted performance of A356 composites by comprehensively assessing the microstructure, interfacial bonding strength, mechanical properties, and wear behavior. The study identified a uniform distribution of TiMoVWCr HEA powder in the composition A356/2%Ti2%Mo2%V2%W2%Cr, highlighting the effectiveness of the FSP technique in achieving homogeneous dispersion. Strong bonding between the reinforcement and matrix material was observed in the same composition, indicating favorable interfacial characteristics. Mechanical properties, including tensile strength and hardness, were evaluated for various compositions, demonstrating significant improvements across the board. The addition of 2%Ti2%Mo2%V2%W2%Cr powder enhanced the tensile strength by 36.39%, while hardness improved by 62.71%. Similarly, wear resistance showed notable enhancements ranging from 35.56 to 48.89% for different compositions. Microstructural analysis revealed approximately 1640.59 grains per square inch for the A356/2%Ti2%Mo2%V2%W2%Cr processed composite at 500 magnifications. In reinforcing Al composites with Ti, Mo, V, W, and Cr high-entropy alloy (HEA) particles, each element imparted distinct benefits. Titanium (Ti) enhanced strength and wear resistance, molybdenum (Mo) contributed to improved hardness, vanadium (V) promoted hardenability, tungsten (W) enhanced wear resistance, and chromium (Cr) provided wear resistance and hardness. Anticipating the potential applications of the developed composite, the study suggests its suitability for the aerospace sector, particularly in casting lightweight yet high-strength parts such as aircraft components, engine components, and structural components, underlining the significance of the investigated TiMoVWCr HEA powder-modified A356 composites.

Section: Resultsmentioning

confidence: 99%

Exploring Microstructural, Interfacial, Mechanical, and Wear Properties of AlSi7Mg0.3 Composites with TiMOVWCr High-Entropy Alloy Powder

Dwivedi,

Sharma,

et al. 2024

“…The molten Al6063 alloy can be degassed both before and after the stirring method. By doing this, dissolved gases that might cause pores to form during solidification are removed …”

Section: Resultsmentioning

confidence: 99%

“…By doing this, dissolved gases that might cause pores to form during solidification are removed. 57 3.1.10. Debubbling Methods.…”

Section: Microstructure and Wettability Analysis Of Aa6063 Alloy/wba ...mentioning

confidence: 99%

Physicomechanical, Wettability, Corrosion, Thermal, and Microstructural Morphology Characteristics of Carbonized and Uncarbonized Bagasse Ash Waste-Reinforced Al-0.45Mg-0.35Fe-0.25Si-Based Composites: Fabrications and Characterizations

Sharma,

Dwivedi,

et al. 2024

An effort was being made to incorporate waste bagasse ash (WBA) both in carbonized and uncarbonized form into the formulation of Al6063 matrix-based metal matrix composites (MMC’s) by partially substituting ceramic particles for them. In the process of developing composites, comparative research on carbonized WBA and uncarbonized bagasse powder was carried out in the role of reinforcement. Microstructure investigations revealed that carbonized WBA particles were properly distributed throughout the aluminum-base metal matrix alloy. They also had the appropriate level of wettability. The reinforcement of carbonized WBA particles in AA6063-based matrix material had a maximum tensile strength of 110 MPa and a maximal hardness of 39 BHN when 3.75 wt % of the particles were used. The deterioration in tensile strength (6.25 wt % of WBA) and the appearance of porosity and blowholes can be enumerated by tensile fractography-based scanning electron microscopy (SEM) analysis. The reinforcement of carbonized WBA particles in AA6063-based matrix material was found to have a maximal percent elongation of 14.42% and the highest fracture toughness of 15 Joules when 1.25 wt % of the particles were employed. For AA6063/3.75 wt % carbonized WBA-based MMC’s, the minimum percent porosity was determined to be 5.83, and the minimum thermal expansion was found to be 45 mm3. As the percentage of reinforcement in bagasse-reinforced composites increases, the density of the material, the amount of corrosion loss, and the cost all decrease gradually. The AA6063 matrix, with a composition of 3.75 wt % carbonized WBA-based MMC’s, had satisfactory specific strength and corrosion loss. The AA6063 alloy composite’s microstructure analysis revealed that carbonized WBA enhanced the material’s mechanical characteristics, contributing to its excellent mechanical capabilities. The results of the corrosion test showed that carbonized WBA-reinforced composites exhibited reduced weight loss due to corrosion, whereas uncarbonized bagasse powder was an inappropriate reinforcement. The SEM analysis of AA6063 alloy/3.75 wt % carbonized WBA ash reinforcement-based MMC’s exposed to a 3.5 wt % NaCl solution has exhibited the development of corrosion pits as a result of localized attack by the corrosive environment. The thermal expansion test showed that the composite with uncarbonized bagasse powder as reinforcement have a high shrinkage rate in comparison with the composite with 3.75 wt %. The composite’s mechanical characteristics and thermal stability were enhanced by the presence of hard phases like SiO2, Al2O3, Fe2O3, CaO, and MgO, as revealed by X-ray diffraction analysis. This made it suitable for use in a variety of applications.

“…174,175 Bulk g-C 3 N 4 has, however, a low photocatalytic efficiency because of disadvantages of high rates electron−hole pair recombination, the small g-C 3 N 4 size (∼10m 2 /g), a tiny agile facet for connection, low surface response kinetics, insufficient visible absorption (less than 460 nm), mild oxidation, grain boundary implications, and poor charge mobility. 176 Various modifications have been implemented to limit these, including strategies like adjusting the band gap, employing micro-or nanoscale engineering, adopting bionic approaches, integrating cocatalysts, and enhancing surface properties. 177,178 The electrons produced in the presence of light are driven by a large thermodynamic driving power, suggesting that they have a high H 2 evolution potential in order to be capable of reducing various small molecules including H 2 O, CO 2 , and O 2 .…”

Section: Cupric Oxide and Cuprous Oxide (Cuo And Cu 2 O)mentioning

confidence: 99%

“…Graphitic carbon nitride (g-C 3 N 4 ) possesses distinctive characteristics as a metal-free polymer and an n-type semiconductor, exhibiting exceptional attributes in terms of electrical, optical, structural, and physiochemical properties . Generally, g-C 3 N 4 has an optical wavelength of 460 nm and a band gap 2.7 eV, which means that it works with visible light. , Additionally, the other attributes of g-C 3 N 4 include special facet properties, nonpoisonous character, abundance, and flexibility that lead to splitting of water with solar irradiation. , Bulk g-C 3 N 4 has, however, a low photocatalytic efficiency because of disadvantages of high rates electron–hole pair recombination, the small g-C 3 N 4 size (∼10m 2 /g), a tiny agile facet for connection, low surface response kinetics, insufficient visible absorption (less than 460 nm), mild oxidation, grain boundary implications, and poor charge mobility . Various modifications have been implemented to limit these, including strategies like adjusting the band gap, employing micro- or nanoscale engineering, adopting bionic approaches, integrating cocatalysts, and enhancing surface properties. , The electrons produced in the presence of light are driven by a large thermodynamic driving power, suggesting that they have a high H 2 evolution potential in order to be capable of reducing various small molecules including H 2 O, CO 2 , and O 2 .…”

Section: Metal Nitride-based Photocatalysts and Their Improvementmentioning

confidence: 99%

Nanocomposite Marvels: Unveiling Breakthroughs in Photocatalytic Water Splitting for Enhanced Hydrogen Evolution

Kumar,

Prasad Singh,

Kumar

et al. 2024

Self Cite

An overview of the significant innovations in photocatalysts for H 2 development, photocatalyst selection criteria, and photocatalytic modifications to improve the photocatalytic activity was examined in this Review, as well as mechanisms and thermodynamics. A variety of semiconductors have been examined in a structured fashion, such as TiO 2 -, g-C 3 N 4 -, graphene-, sulfide-, oxide-, nitride-, oxysulfide-, oxynitrides, and cocatalyst-based photocatalysts. The techniques for enhancing the compatibility of metals and nonmetals is discussed in order to boost photoactivity within visible light irradiation. In particular, further deliberation has been carried out on the development of heterojunctions, such as type I, type II, and type III, along with Z-systems, and S-scheme systems. It is important to thoroughly investigate these issues in the sense of visible light irradiations to enhance the efficacy of photocatalytic action. In fact, another advancement in this area may include hiring mediators including grapheme oxide and metals to establish indirect Z-scheme montages with a correct band adjustment. The potential consideration of reaction chemology, mass transfer, kinetics of reactions, restriction of light diffusion, and the process and selection of suitable light and photoreactor also will optimize sustainable hydrogen output efficiency and selectivity.