Mamoun Fellah

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• Professor
• Professor (Full) at Abbès Laghrour University of Khenchela

Gram-negative bacteria Pseudomonas putida, Gram-positive Bacillus subtilis, and Staphylococcus aureus were utilized as test samples to evaluate the antibacterial characteristics of DD3-clay/MgO and DD3+38 wt% ZrO2-clay/MgO nanoparticles. The ceramic powders prepared by a thermal autoclave method are characterized before and after Mg addition by SEM...

In order to create alloys with exceptional properties for orthopedic uses, this study focuses on the impact of zirconium (Zr) content on the structural, electrochemical, and tribological qualities of nanostructured Ti–25Nb-xZr [x = 5, 10, 15, 20, 25, and 30 atomic (at.) %] alloys. The structural evolution was investigated using XRD and SEM techniqu...

This study examines the modification of DD3 ceramic composites through the systematic incorporation of zirconium oxide (ZrO₂) in concentrations ranging from 0 to 40 wt.%. A variety of characterization techniques were employed, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic f...

Transparent conductive oxides face critical challenges in simultaneously optimizing electrical conductivity and optical transparency for advanced optoelectronic applications. Zinc oxide (ZnO) and aluminum-doped zinc oxide (Al-ZnO) thin films are extensively studied for their optoelectronic applications due to their excellent transparency (> 85% in...

This study thoroughly assesses the dielectric performance of high-purity alumina (99.6%) in comparison to 96% alumina, emphasizing its enhanced reliability for advanced electronic applications. Experimental measurements and numerical simulations demonstrate that 99.6% alumina maintains stable capacitance (~ 38 pF) across both low (0–120 Hz) and hig...

The current review examines various methods for preparing photocatalytic materials based on ceramic substrates, with a focus on incorporating metal oxides such as ZnO, CuO, and MgO. This study compares traditional mixing, co-precipitation, sol–gel, and autoclave methods for synthesizing these materials. Kaolin-based ceramics (DD3 and DD3 with 38% Z...

This study investigates the structural, optical, and electrical properties of Sn-doped CuO thin films, which were synthesized using a simple solution-based method. X-ray diffraction (XRD) analysis confirmed that the doping of Sn did not induce phase transitions in CuO, as the films maintained the monoclinic structure. The crystallite size decreased...

The effect of iron concentration on the microstructural and structural properties of ZnO for electrolysis and photodetector applications was investigated. The thin layers of un-doped and doped ZnO with different percentages of Fe (2, 4, and 6 wt.%) were deposited by spin-coating on glass substrates. Sample characterization was done by X-ray diffrac...

The synthesis of magnesium titanate (MgTiO₃)-based ceramics via high-temperature solid-state reactions between MgO and TiO₂ has unlocked a pathway to achieving desirable crystalline structures and exceptional dielectric properties. This study introduces an innovative approach by leveraging the electroluminescence current technique to measure polari...

This study investigates the bioactivity; wear performance, and topography of a novel beta-type titanium-based alloy using techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and 2D and 3D analysis. The tribological test was evaluated using a ball-on-disk tribometer in a wet environment. Different l...

This study evaluates the effectiveness of heterogeneous photocatalysis in advanced oxidation processes (AOPs) for degrading organic pollutants, specifically malachite green (MG). The experiments used newly synthesized monometallic photocatalysts copper oxide (CuO) and nickel oxide (NiO) supported on Tunisian green clay, which was treated to enhance...

The development of novel microporous ceramic membranes for nano-, ultra-, and microfiltration aims to produce cost-effective products with superior mechanical, thermal, and chemical resistance. This study investigates ceramic-based materials topped with aluminum and zirconium, reinforced with zinc and magnesium compounds, and fabricated using co-pr...

Clay is commonly used to remove pollutants like heavy metals from water. It has excellent properties, such as high cation exchange capacity and a large specific surface area. Various techniques can be used to improve these materials, including organic modification using polymers, calcination, acid activation, and modification through surfactant ads...

The equiatomic titanium-nickel alloy, known as nitinol, is a highly sought-after titanium-based alloy used in biomedical applications, particularly in orthopedic implants. Its outstanding properties, such as low density, shape memory effect, high wear and corrosion resistance, good biocompatibility, and low Young's modulus compared to stainless ste...

This study focuses on investigating the structural, morphological, optical, and electrical characteristics of copper oxide (CuO) that has been doped with varying concentrations (x = 4%, 10% of zinc (Zn) by the utilization of sol–gel spin coating technique. The Cu1-xZnxO thin films underwent characterization using several analytical techniques, incl...

Semiconductor nanostructures have significantly advanced water waste photolysis and hydrogen production through water decomposition. Ceramic materials in thin layers are crucial for protection, gas sensing, and photovoltaics, with thin films exhibiting distinct physicochemical properties compared to bulk materials. The study of nanostructured mater...

The materials used were of analytical purity, with titanium (Ti) sourced from Allegheny Technologies Incorporated, and zirconium (Zr) and niobium (Nb) from H.C. Starck. The elemental powders, with a particle size of 20 µm, were mechanically alloyed in a planetary ball mill under argon gas to reduce their size to 10 to 100 µm. Milling occurred in dr...

This research presents a novel approach by integrating Zr thin films on DD1Z ceramic substrates, setting it apart from previous studies that primarily utilized glass or other types of substrates. Additionally, it provides valuable insights into the mechanisms that enhance charge carrier separation and the generation of reactive species. This resear...

This study investigates the enhancement of DD3 ceramic by adding 15 wt% MgO through hydrothermal synthesis to improve its structural integrity and antibacterial properties for medical and environmental uses. DD3 ceramics are appreciated for their durability; however, their antibacterial properties are limited. The rising problem of antibiotic-resis...

Exploring doping elements can enhance the efficiency of photocatalysis and allow for tailored materials for specific applications. This study developed thin copper layers, both pure and doped with various percentages of Al (5, 15, 25, and 50 wt.%), on a glass substrate using the sol-gel spin coating technique. These layers were investigated for the...

This study investigates the structural, optical, and photocatalytic properties of zirconium-doped zinc oxide (Zr) thin films deposited on ceramic and glass substrates. X-ray diffraction (XRD) analysis revealed that all samples exhibited a polycrystalline wurtzite structure, with grain sizes ranging from 25 to 43 nm for ceramic substrates and 19 to...

Understanding space charge dynamics in cross-linked polyethylene (XLPE) is crucial for optimizing electrical insulation systems, preventing insulation failure, and ensuring the reliable performance of electrical equipment. Research is focused on advanced characterization techniques and predictive models to mitigate space charge effects, which are k...

The corrosion resistance of an implant material is an essential element of its biocompatibility. This research focuses on studying the effect of grinding/milling time on the corrosion behavior of the mechanically alloyed Ti50 %-Ni50 % (at%) alloy, for bone implant use, at varying milling times of 2, 6, 12, and 18 h. The powder particles' size, shap...

The purpose of this work is to enhance the structural, optical, and electrical properties of (PS-ZrC-SiO2) nanostructures by creating thick coatings of polystyrene. By using the casting procedure, (PS-ZrC-SiO2) nanocomposite films are created. Compared to pure (PS), optical microscope pictures show that the (ZrC-SiO2) nanoparticles form an ongoing...

Different non-linear methods for calculating the reliability and mechanical performance of timber–concrete composite beams connected using threaded steel rods are compared. Two distinct approaches are used and validated using experimental data: a three-dimensional finite-element model developed using ABAQUS and an analytical study using a frozen sh...

In recent years, fused deposition modeling (FDM) techniques have become essential for the future of additive manufacturing. One of the main challenges is to identify the optimal printing parameters that enhance the quality, productivity, and durability of the resulting structures. Although hardness is critical for mechanical strength and wear resis...

The research aimed to enhance the efficacy of kaolin in water treatment by incorporating diphenylamine (DPA) and to evaluate its effectiveness in adsorbing lead and copper in wastewater in comparison to natural kaolin (Nat-kaolin). This entailed modifying kaolin with DPA to create DPA-kaolin and conducting comprehensive characterization utilizing a...

To study certain properties of the thin layers of Al doped SnO2 produced by the dip coating process. Thin layers of aluminum-doped tin dioxide with different doping rates (2 %, 4%, 6% and 10%), were deposited on glass substrates. We analyzed the optical properties of SnO2 thin layers of transmittance, optical and electrical gap before and after dop...

Capsicum annuum L. var. “Chile de árbol” combined with poly(lactic-co-glycolic acid) (PLGA) and TiO2-ZnO oxides synthesized at different molar ratios and pH (Ti-Zn A and B 3:1, 1:1, and 1:3) via the sol-gel method was characterized by the Brunauer–Emmett–Teller (BET) method, a UV-Vis spectrophotometer (UV-Vis), Fourier transform infrared spectrosco...

This work is essential for the advancement of nanocomposite technology, with substantial societal ramifications. The evolution of economically viable and high-performing nanocrystals (NCs) may result in the creation of more efficient and adaptable optoelectronic devices, hence contributing to technical progress and economic advantages. The (PVA–PEG...

Magnesium-doped zinc oxide thin films were dip-coated onto porous ceramic and glass substrates under identical conditions (50 layers, same doping ratio). Structural, morphological, and photocatalytic properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), UV-visibl...

Nanostructured Ti 80 Ni 20 material was elaborated by mechanical alloying from pure Ti and Ni powders in a planetary ball-mill P7 under argon atmosphere at ambient temperature. Morphological, microstructural, magnetic, and nanoindentation properties were studied using scanning electron microscopy, X-ray diffraction, magnetic measurements, and nanoi...

This research is essential for the progress of nanocomposite technology, with ramifications for society. The development of economical and high-performing nanocomposites may result in improved and adaptable optoelectronic devices, therefore contributing to technical progress and economic advantages. The (PMMA-SiO2/CuO) nanocomposites(NCs) have been...

Due to photoirradiation-induced deterioration, poly(methyl methacrylate) (PMMA), a thermoplastic that is extensively used and valued for its transparency and adaptability, performs less well in a variety of applications. This extensive analysis looks at creative approaches to improve the photoirradiation stability of PMMA, mostly concentrating on p...

Ceramic materials based on mullite, cristobalite, and zircon phases prepared with different zinc and copper additions using the co-precipitation method and followed by calcination at 500 °C for 2 h are investigated. The effectiveness of these substrates against bacteria was tested against Gram-positive and Gram-negative pathogenic strains: Staphylo...

In this study, Cu2O nanoparticles were synthesized using the sol–gel technique and subsequently functionalized with extracts from plants of the Rauvolfioideae subfamily and citrus fruits. Comprehensive characterization techniques, including UV-Vis spectroscopy, FT-IR, XRD, BET, SEM, and TEM, were employed to evaluate the structural and surface prop...

Citation: Torres-Ramos, M.I.; Martín-Camacho, U.d.J.; Sánchez-Burgos, J.A.; Ghotekar, S.; González-Vargas, O.A.; Fellah, M.; Pérez-Larios, A. Cu 2 O Nanoparticles as Nanocarriers and Its Antibacterial Efficacy. Abstract: In this study, Cu 2 O nanoparticles were synthesized using the sol-gel technique and subsequently functionalized with extracts fr...

Hydrogen peroxide (H2O2) has practical applications in healthcare, food security, and environmental protection. The current study has been focused on creating H2O2 sensors using a bimetallic composition of polypyrrole/Cobalt-silver on indium tin oxide (ITO) through electrochemical fabrication. Composite hybrid materials comprising Co@Ag/PPy/ITO wer...

In this study, Cu2O nanoparticles were synthesized using the sol-gel technique and subsequently functionalized with extracts from plants of the Rauvolfioideae subfamily and citrus fruits. Com-prehensive characterization techniques, including UV-Vis spectroscopy, FT-IR, XRD, BET, SEM, and TEM, were employed to evaluate the structural and surface pro...

Recently Nanoparticles (NP) of Zinc Oxide has been obtained from Green Synthesis increasing their knowledge, studying their characteristics and capabilities, due to obtaining process. The reason for understanding ZnO NP using the green method is their interaction with cancer cells. It was observed that in the green process, some compounds can join...

In recent years, fused deposition manufacturing (FDM) techniques have been seen as the processes of the future. One of the main challenges is to identify the optimal parameterization of the 3D printing process in terms of quality, productivity, and service durability of the resulting structures. Hardness is little studied in the literature dedicate...

Schiff bases are crucial intermediates in organic chemistry. They are used to introduce carbon–nitrogen double bonds in organic molecules. In this study, 4-(2-hydroxyanilino) pent-3-in-2-one (L) was synthesized from the reaction of 2,4-pentanedione and 2-aminophenol. The structure of L was confirmed through analytical and spectroscopic data. In add...

With its unique corrosion resistance, light weight, mechanical strength, and biocompatibility, TNZ is a versatile metal alloy that is used in the aerospace and medical industries. The current study aims to investigate the effect of milling time (2, 12, 24, and 36 h) on the nanostructured ternary alloy Ti-25Nb-25Zr (TNZ) prepared by high energy ball...

Pathogens that are resistant to multiple drugs, commonly known as superbugs, including viruses and fungi, are posing a significant danger to human health. These superbugs are responsible for causing high rates of morbidity and mortality each year, and the numbers are continuing to rise. Therefore, the search for potent, safe, and viable alternative...

The hunt for active components creates new opportunities to modify photocatalysis materials that we use on a daily basis to cleanse water from pollutants that pose a threat to human life and living organisms. The current study focuses on studying the structural, morphological, optical, electrical, and photocatalytic features of copper oxide (CuO)....

The goal of this research is to improve the silicon dioxide (SiO2), cobalt oxide (CoO), and polyvinyl alcohol (PVA) nanostructures' structural, optical, and dielectric properties. The casting method with varied concentrations of CoO-SiO2 NPs (0, 2, 4, and 6 wt.%) was used to create PVA-CoO-SiO2 NCs. Structural, optical, and electrical characteristi...

Ti-Ni shape memory alloys (SMA) are used extensively in the field of orthopedics owing to their unique physical and mechanical features, excellent corrosion resistance, and good biocompatibility in the human body environment. This study aims to investigate how milling time affects the characteristics of Ti-Ni alloys which were synthesized with equa...

The organic–inorganic hybrid composite materials, polybithiophene and Cadmium Sulphide have been successfully synthesized by electrochemical method onto the ITO substrates. The obtained hybrids were characterized by techniques like Scanning electron microscope (SEM), UV–Vis photo spectrometer and X-ray diffraction (XRD) to examine the phase purity...

Titanium (Ti)-based alloys with only a b-phase have attracted academic and industrial interest for ortho-pedic application, due to their close properties to those of tissues. The current study aims to investigate the effect of milling time (2 h, 6 h, 12 h and 18 h) on the nanostructured ternary alloy Ti-25Nb-25Zr prepared by high energy milling, on...

In order to confirm the influence of the materials on the porosity and define the saturation of pellets, the samples were studied with water. Different types of pellets based on ceramics 'mullite-zircon' and zinc/magnesium (DD3Z(t) + ZnO, DD3Z(t) + ZnO and DD3Z(t) + Mg) prepared by a co-precipitation method were studied.

Titanium (Ti)-based alloys with only a b-phase have attracted academic and industrial interest for ortho-pedic application, due to their close properties to those of tissues. The current study aims to investigate the effect of milling time (2 h, 6 h, 12 h and 18 h) on the nanostructured ternary alloy Ti-25Nb-25Zr prepared by high energy milling, on...

Titanium (Ti)-based alloys with only a b-phase have attracted academic and industrial interest for ortho-pedic application, due to their close properties to those of tissues. The current study aims to investigate the effect of milling time (2 h, 6 h, 12 h and 18 h) on the nanostructured ternary alloy Ti-25Nb-25Zr prepared by high energy milling, on...

To evaluate the role played by the substrates on the change and the actual difference of the studied samples on their structural, morphological, optical and photocatalytic properties, thin layers of zinc oxide grafted with magnesium were prepared with the same number of layers, doping ratio and experimental conditions with the use of two types of p...

The main focus of this work is to investigate the impact of varying milling times (2 to 18 h) on the structural and mechanical properties of the developed Ti-Nb-Mo alloy. The morphology, phase composition, microstructure, and mechanical behavior of milled and sintered Ti-25Nb-25Mo alloy samples were characterized systematically using x-ray diffract...

The influence of milling time on the tribological behavior of a Co–Cr–Mo alloy designed for biomedical applications, synthesized via mechanical alloying is investigated. Elemental Co, Cr and Mo powders are milled using different milling times (2, 6, 12 and 18 h) in a high-energy ball mill. The resulting powders were subjected to cold uniaxial and h...

The present proceedings contain papers presented at the 1st National Conference on Materials Science and Engineering (MSE’22), held in Abbes Laghrour University, Khenchela – Algeria, June 28 - June 29, 2022. The purpose of the conference is to provide a comprehensive forum for experts and participants from academia and Industry to exchange ideas an...

To purify water at low cost for our daily life, the effect of ceramic-based (mullite–cristobalite) and (mullite–zircon) powders doped with different amounts of magnesium oxide (MgO) (10 and 20 wt%) was studied. These compounds are made of a local raw material DD3 with addition of zirconia (ZrO 2 ) to create an open porosity. The powders were prepar...

In this work, copper and zirconium were added into the Ti(Al)N matrix to form deposited on TiAl(Cu, Zr)N coating using RF magnetron sputtering system in order to improve the mechanical, wear performance, and antibacterial activity. Results revealed that the TiAl(Cu, Zr)N coatings have a dense structure with (111) preferential orientation. The depos...

This conference aims and dedicates itself to providing networking possibilities for researchers, scientists, engineers and scholars to share their experience, original ideas and innovative research in the fields of Materials Science and Technology, the state-of-the-art methodologies and technologies within materials, Chemical Engineering and Proces...

Titanium alloys are in demand for various biomedical applications and the most popular among them being, Ti-6Al-4V. Hence, in this study, Ti-6Al-7Nb are fabricated through the route of mechanical milling using different sintering temperatures. X-ray diffraction and hardness tests were conducted to characterize the developed samples to evaluate the...

TiZrN thin films were deposited on Si (100) wafers and XC100 steel substrates by reactive R.f. magnetron sputtering using titanium and zirconium targets in an Ar-N2 mixture atmosphere to evaluate the effect of varying Zr content (0 to 22.2 at.%), on the film structure, surface wettability, hardness and wear resistance. The presence of different pha...

Magnetron sputtering is one of the most commonly used deposition techniques, which has received considerable attention in industrial applications. In particular, owing to its compatibility with conventional fabrication processes, it can produce and fabricate high-quality dense thin films of a wide range of materials. In the present study, nitrogen...

Structural and tribo-mechanical properties of Zr-O-N films deposited by reactive magnetron sputtering in a mixture of Ar (flow rate = 80 sccm), N2 (flow rate = 20 sccm) and O2 with a varying flow rate of 0 to 12 sccm were investigated. The films were characterized using scanning electron microscopy, energy dispersive x-ray analysis, atomic force mi...

This research aims to complement and enhance the understanding of friction and wear behavior of AA7075 and CuZn39Pb2 under different conditions. One set of experiments were conducted under the laboratory conditions, simulating an ideal case using a ball-on-disc configuration, while the other set of experiments were conducted under the actual field...

Replacement of toxic and expensive vanadium (V) in medical grade titanium alloys with cheaper and non-toxic elements such as iron (Fe) or niobium (Nb), is an important step forward in developing safer and less expensive biomaterials. Evaluating the effect of different process parameters such as the milling time on the properties of these newly deve...

Ti-alloys are widely used in biomedical devices and components, due to their desirable properties, such as low modulus, biocompatibility and corrosion resistance. Microstructural modification is often performed in order to improve physical, mechanical and tribological properties. This study aims to examine the effect of Nb content on mechanical and...

Surfactants are widely used in many chemical industries and as primary components of cleaning detergents due to their specific characteristics,which in turn results in high pollution of domestic and industrialwastewaters by such substances. In this study, the mechanistic pathways of the adsorption of cationic benzyl-dimethyl-dodecyl ammoniumbromide...

Implant-related follow up complications resulting from poor implant integration, delamination, chipping, mechanical instability, inflammation or graft-vs-host reaction may lead to low patient tolerance, prolonged care and sometimes leading to a second surgery. Hence, there is an urgent need for developing biomaterials which will help to overcome th...

An artificial neural network (ANN) model was developed to predict tensile and impact properties of a submerged arc helical welded (SAHW) pipeline steel API X70 based upon its chemical composition. Weight percent of the elements was considered as the input, while the tensile and Charpy impact properties were considered as the outputs. Scatter diagra...

Certificate of review journal of Transactions of Nonferrous Metals Society of China

Nanocrystalline Cr50Ni50 material was obtained by high-energy ball milling from pure Cr and Ni powders in a planetary ball-mill P7 under argon atmosphere at ambient temperature. Microstructural, structural, morphological, magnetic, and densification properties were studied by X-ray diffraction, scanning electron microscopy, magnetic measurements, a...

review

Ti–Ni powder compacts were prepared by Mechanical alloying (MA), followed by hot isostatic pressing (HIP). Afterwards, the samples were sintered at different temperatures (950, 1050, 1150 and 1250 °C). Microhardness, density, crystallite size as well as microstrain of the sintered samples were measured and analyzed. Wear characteristics in phosphat...

Hexavalent chromium pollution from industrial waste water is a serious problem as it can cause adverse effects on the environment. Several methods are used to reduce the harmful effects of this pollutant, especially physico-chemical methods, such as Adsorption technology. The present study Preparation of Cr (VI) solution) from industrial sources in...