A5011298401- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Solar-Powered Water Purification Methods
- Solar Thermal and Photovoltaic Systems
- Membrane Separation Technologies
- Advanced Surface Polishing Techniques
- High-pressure geophysics and materials
- Welding Techniques and Residual Stresses
- Force Microscopy Techniques and Applications
- Carbon Nanotubes in Composites
- Additive Manufacturing Materials and Processes
- Microstructure and mechanical properties
- Microstructure and Mechanical Properties of Steels
- Flame retardant materials and properties
- Water Quality Monitoring Technologies
- Laser-Ablation Synthesis of Nanoparticles
- Aerogels and thermal insulation
- High-Temperature Coating Behaviors
- Metallurgy and Material Forming
- Solar Radiation and Photovoltaics
- Advanced machining processes and optimization
- Lubricants and Their Additives
- Laser Material Processing Techniques
- High Entropy Alloys Studies
Kafrelsheikh University
2016-2024
Robert Gordon University
2024
Kyushu University
2016-2021
Non-laminated glass fiber-reinforced epoxy composites (GFREC) have shown promising applications in various engineering fields. In this study, an experimental investigation followed by artificial intelligent modeling is carried out on the drilling of GFREC under two cooling conditions, namely internal and external. The damage factor drilled holes temperature drill tip were considered as main process responses. experiments conducted different combinations feed, spindle speed coolant pressure....
In response to environmental concerns, there is a growing demand for durable and sustainable mechanical seals, particularly in high-risk industries like chemical, petroleum, nuclear sectors. This work proposes augmenting the durability sustainability of silicon carbide (SiC) ceramic seals with application nanodiamond composite (NDC) film through coaxial arc plasma deposition (CAPD) vacuum atmosphere. The NDC coating, smooth surface roughness Ra = 60 nm as substrate, demonstrated thickness...
Abstract Wire Arc Additive Manufacturing (WAAM) produces metal components with crucial properties dependent on process parameters. Understanding the effects of these parameters microstructure and mechanical is vital for optimizing WAAM. This study investigated impact varying travel speeds (TS) low carbon steel ER70S-6 alloy produced by WAAM process. The hypothesis centred different TS values heat input (HI) cooling rates, subsequent resulting deposited material. was at three TS: 120, 150,...
Super-hard nanodiamond composite (NDC) films, synthesized via cathodic arc plasma deposition on unheated WC − Co substrates, offer an eco-friendly solution for cutting tools. A 100 nm-thick Al-interlayer mitigates catalytic effects, improving adhesion and yielding smooth dense 10 µm-thick films at a rate of 3.3 μm/hr. These grain-boundary-rich nanostructured with impressive 58 GPa hardness attributed to substantial 70 % C sp3 fraction, prove optimal hard coatings. The effectively suppresses...
Raman spectroscopic studies on nanodiamond composite (NDC) films, comprising nano-sized diamond grains and an amorphous carbon (a-C) matrix, deposited by coaxial arc plasma deposition are challenging because the scattering of competes with strong signal a-C matrix. To unravel nanocomposite structure NDC both far- near-field spectroscopy were employed. Based comparison visible ultraviolet far-field data, component spectra based either or estimated a peak-decomposition procedure band fitting....
Sustainable nanodiamond composite (NDC) films hold promise for high-performance hard coatings thanks to coaxial arc plasma deposition (CAPD). This eco-friendly technique eliminates the need external heating, chemical reactions, or Co substrate pre-treatment. CAPD boasts lower energy consumption and faster rates, making it a sustainable solution growing demand high-quality, environmentally friendly coatings. study investigates influence of discharge on nanostructure mechanical properties...
Abstract This study explores the optimization of target-substrate distance (TSD) in coaxial arc plasma deposition technique for depositing nanodiamond composite (NDC) films on unheated WC–Co substrates, with a focus enhancing properties relevant to cutting tool applications. TSD significantly impacted film growth and adhesion, while hardness Young’s modulus remained stable within 10–50 mm range. Increased led reduced rates thickness, but improved quality by eliminating macroparticles...
Nanodiamond composite (NDC) films, with a notable hardness of 65 GPa and substantial thickness 10 µm, were successfully fabricated on unheated WC−Co substrates using cathodic arc plasma deposition (CAPD) technology. Raman synchrotron-based structural analysis, comparing NDC films similarly hard tetrahedral amorphous carbon (ta-C) chemical vapor (CVD) diamond, unveiled distinctive features. Visible spectroscopy highlighted NDC's unique nanostructured composition, characterized by nanodiamond...
Cemented carbide (WC−Co) tools suffer from surface abrasion, limiting their performance. This study explores droplet-free tetrahedral amorphous carbon (ta-C) coatings deposited via arc ion plating as a solution. The possess dense, sp3-rich structure, leading to remarkable hardness of 60 GPa compared 37 WC−Co, and strong adhesion with critical scratch load 41 N. Tribological tests confirm effectiveness. Dry sliding show reduced wear lower CoF (0.123) uncoated (0.159). Notably, water-soluble...
te targets. The undoped films deposited at room temperature and a repetition rate of arc discharges 1 Hz have the maximum hardness 51 GPa Young's modulus 520 GPa. With increasing substrate rate, are degraded, which might be because growth spFrom energy-dispersive X-ray spectroscopic measurements, diffusion Co atoms from substrates into were observed for Si-doped films. Since induce graphitization due to catalytic effects, degraded Si doped should attributable effects Co. For Cr-doped films,...
Ultrananocrystalline diamond/hydrogenated amorphous carbon films were synthesized by coaxial arc plasma deposition. The morphological and structural evolutions of the driven laser irradiation (ArF, 193 nm, 20 ns) are examined at different energies (0.4–1 J cm−2). Up on irradiation, revealed hydrogen effusions accompanied transformation sp3 into sp2-hybridization carbon. However, film irradiated 0.8 cm−2 exhibited higher fractions, which can be attributed to that: a specific value energy...