Farhad Othman

university of technology · Department of Materials Engineering

In the last period of scientific research, the application of nanoscale materials had a huge interest in enhancing sustainability and improving the performance of concrete. This paper discusses lots of experimental truths about nanoparticles (CuO, Fe 2 O 3 ) and nanocomposite particles (CuFeO 2 and CuO/Fe 2 O 3 ), which are manufactured by green ch...

The tensile zone of concrete is prone to cracking due to its limited ability to withstand tension. To address this issue, steel reinforcement is used in these specific regions. The occurrence of little cracks might potentially facilitate the ingress of liquids and gases into the reinforcing material, hence inducing corrosion. Self-healing concrete...

The demand for ceramic products for orthopedic applications is increasing due to the lowest rate of wear. A fourth-generation ceramic (BIOLOX delta; CeramTec.) consists of 82 wt. % Al2O3, 17 wt. % (1.3 Yttria Stabilized ZrO2), 0.5 wt. % strontium oxide, and 0.5 wt. % chromium oxide. It has good mechanical properties compared to the other generation...

A study was conducted to add agricultural and industrial wastes and nanomaterials to concrete combined with carbon fibers to improve the mechanical and electrical properties of concrete for use in advanced applications in electromagnetic shielding and conductive concrete. Carbon fiber was used at 2 wt.% of sand and ( electrical induction furnaces s...

Additive Manufacturing (AM) technologies have been emerged as a fabrication method to obtain engineering components within a short span of time. 3D printing, also referred as additive layer manufacturing technology is one of the powerful methods of rapid prototyping (RP) technique that fabricates three-dimensional engineering components. fused depo...

In orthopedics, increasing the implant lifetime minimizes the need for repair surgery, which benefits the patient’s health and the practice bottom line. The quality of the materials and designs is always being enhanced to reach the ultimate objective of a single implant that would last a person their whole life. The purpose of orthopedic treatments...

As a result of the rapid development of electronic devices, this study aims to manufacture concrete and cement materials to protect against electromagnetic interference. Building materials can be developed for use in advanced applications such as electromagnetic shielding and conductive concrete. In this paper, one of the industrial wastes, slag, w...

The addition of agricultural and industrial solid wastes and nanomaterials to concrete combined with steel fibers to improve the mechanical and electrical properties of concrete was investigated. This approach could be used in advanced applications in electromagnetic shielding and conductive concrete. Steel fibers were used at 2%wt. of sand and (in...

Various nanoparticles have been developed for bio-applications. However, nanocomposites particles, (NCPs) with effective and ability to sensing cholesterol, are still needed. Herein, we present new cholesterol and pH-responsive NCPs as sensor particles to promote sensitivity. The traditional method of mixing and grinding was used to fabricate the o...

The cutting process is an important process of industrialization. It is requisite to using advantage quality cutting tools in order to preserve the type of product. Coating on the cutting tool has a substantial effect in terms of mechanical properties and the end results of the product. The cutting tool can be manufactured in various material types...

The based semiconductor-metal oxide gas 3D-detector of cadmium oxide has been fabricated from cadmium chloride salt upon a glass substrate via the technique of spray pyrolysis with a thickness around (0.5 ± 0.01 μm) utilizing precursors in form of water soluble at a flat glass substrate and a tube hollow design. Three different dimensions were used...

Surface roughness consistency is one of the challenges for producing high-quality goods in the industry. Surface predicting efficiency plays a vital role in correctly managing the machining parameters during turning operations. Selecting the correct cutting instrument is considered one of the most critical factors influencing the machined surface’s...

Because cracks are the main problem of mass concrete, this paper investigates an experimental study on the effect of polypropylene microfiber (PPMFs) on self -repair behavior of mass concrete, through study the microstructure, workability, physical, and mechanical properties of mass concrete. PPMFs with a diameter of 18 µm add in different percenta...

The need to obtain microcapsules at a low cost is an important requirement for construction and repair workers. In this paper, four polymers (Polystyrene, Sika 5930, Master Glenium 51, Sika WT 200) were used to encapsulated and coated Portland cement particles with three weight ratios of (5, 10, 15) wt% for the Production of self-healing cement cap...

This paper examines the structural, workability, physical and mechanical properties of (mass concrete) with the inclusion of microcapsule of Zinc oxide (ZnOMC) with a size (0.5) µm and in different percentages (0, 0.5, 1 and 1.5) % of cement weight. The proportions of the concrete mixture were (1:2:4.8) and the water-cement ratio (W/C) was 0.4. 0.6...

Because cracks are the main problem of mass concrete, this paper investigates an experimental study on the effect of polypropylene microfiber (PPMFs) on self -repair behavior of mass concrete, through study the microstructure, workability, physical, and mechanical properties of mass concrete. PPMFs with a diameter of 18 μm add in different percenta...

This study describes the preparation and study of the properties of Nano composite particles prepared in a sol-gel method which consists of two materials (Αl2Ο3-MgΟ). The powder was evaluated by x-ray diffraction analysis, scanning electron microscopy analysis (SEM), particle size analysis, and energy dispersive x-ray analysis (EDX) and antibacteri...

A proper slurry design is critical to cementing work success. In the present investigation, a ball mill method was utilized for preparing a nano powder from a cement dust material, supplied via Al-Kufa Cement Factory, to reinforce the oil well cement by utilizing it as a partial replacement of oil well cement class (G) using different weight percen...

In this Research, a ball mill procedure was used to prepare a nanopowder from a cement dust material supplied by Cement Factory for reinforcing the oil well cement through using it as a partial replacement of oil well cement class G by a weight percentage of (0.25 to 1%) and nanorod ZnO with the same percentages. The mix with a water to cement rati...

Adequate slurry design is critical to the success of a cementing work. In this study, a ball mill procedure was used to prepare a nano powder from a fly ash material supplied by Al-kufa Cement Factory for re-inforcing the oil well cement through using it as a partial replacement of oil well cement class G by a weight percentage of(0.25%,0.5%, 0.75%...

In this research, we have added nano anatase TiO2 as a partial replacement of Portland cement by a weight percentage of (0.25 to 1%) for the development of properties for protection against bacteria. The control mix was made by using "the cement to sand" proportion about (1: 2.75) with the "water to cement" proportion of (0.5) to study the structur...

For the first time zinc tungstate semiconductor oxides films (ZnWO4) was successfully synthesized simply by advanced controlled chemical spray pyrolysis deposition technique, via employed double nozzle instead of single nozzle using tungstic acid and zinc chloride solutions at three different compositions and spray separately at same time on heated...

This article describes the use of a semiconductor gas sensor for disease diagnosis that may potentially serve as diagnostic tool handheld breath analyzer to provide detection device. Tri metal oxides were fabricated by a modified chemical spray pyrolysis technique by the mixing of tungsten and tin salts composition at (1:1, 3:1) respectively, with...

In this research, the ball mill is used for the preparation of Nano powder from a fly ash material resulted from kufa cement factory for supporting mortar using produced Nano powder as a partial replacement of Portland cement by a weight percentage of (0.25 to l%). The reference mix was made with a cement-to-sand ratio of l:2.75 and the water-to-ce...

In this research, cement mortar specimens were prepared with sand to cement(1:2.75) and (1, 2, and 3 wt%) of ceramic oxides (MgO, ZnO and Al2O3) at different particlesizes (11.8, 38.8, 109.8 nm), respectively. At curing time (7days), the (structural, thermaland physical) characteristics of the mortar specimens were investigated.The dry density and...

This paper describes the use of semiconductor gas sensor for detection of Carbon monoxide levels in exhaled human breath serving as breath marker of lung inflammation. In this research tri metal oxides were fabricated by simple chemical spray pyrolysis technique from mixtures of tow composition (Na2WO4: SnCl2 and Na2WO4, : 3 SnCl2) salts at concent...

The title of this research is given to the different techniques which used for manufacture various objects is three-dimensional printing. The technology of additives manufacturing in the thermoplastic materials prototypes is used to fused deposition technique. The current study will focus on the effect of the thickness of the layer on the mechanica...

With increased interest using of 3D printing and the development of the STL file and the open-access CAD: It is important to determine which density and density patterns will provide the perfect strength for various applications. This is of great importance because in additives manufacturing (AM), the CAD model does not have any information about t...

The major parameters of FDM are Infill Density, Layer thickness, Shell thickness, Print speed which considered for mechanical testing and dimensional accuracy of the printed specimens. Fused Deposition Modeling (FDM) technology allows users to control the density of models through parameter which is termed air gap or infill. Test specimens were use...

The major parameters of FDM are Infill Density, Layer thickness, Shell thickness, Print speed which considered for mechanical testing and dimensional accuracy of the printed specimens. Fused Deposition Modeling (FDM) technology allows users to control the density of models through parameter which is termed air gap or infill. Test specimens were use...

Prototypes are built by rapid prototyping technology; this technology provides variant models. The components of the model are delivers in a few hours. Commercial devices include rapid prototyping system, fused deposition modeling (FDM), rapid prototyping and 3D printers. Currently, the approaches of rapid prototyping can be represented appropriate...

This paper involves the effect of iron powder in recycling of aluminum cans scrap on some mechanical properties. This process includes burning aluminum cans to remove paint and shredding into small pieces then melting aluminum pieces using an electrical furnace at (750 ºC). Iron powder (0.6, 1.2 and 1.8 wt %) was added to the melt sequentially. The...

The experimental work is divided in two parts, in the first part was prepared the mortar samples and mixing proportions cement\sand (1:3)they were mixing these samples with nano scale ceramic powders (ZrO2 and TiO2) respectively the percentages by weight are taken from cement ratio (0.1, 1, 2.5, 5, and 10%) at particle size (50nm) and curing time (...

In this research tri metal oxides were fabricated by simple chemical spray pyrolysis technique from (Sn(NO 3) 2 .20 H 2 O, Zn(NO 3) 2 .6 H 2 O, Cd(NO 3) 2 .4 H 2 O) salts at concentration 0.1M with mixing weight ratio 50:50 were fabricated on silicon substrate n-type (111). (with & without the presence of grooves by the following diemensions (20µm...

In this research the mechanical properties of PMMA polymer reinforced by ceramic particles (silica) has been investigated. Many tests are performed on these composites. The effects of the particles size and volume fraction on the mechanical properties which include: ultimate tensile strength, elongation percentage, modulus of elasticity, bending mo...

In this research the mechanical properties of PMMA polymer reinforced by ceramic particles (silica) has been investigated. Many tests are performed on these composites. The effects of the particles size and volume fraction on the mechanical properties which include: ultimate tensile strength, elongation percentage, modulus of elasticity, bending mo...