Research Papers/Topics in Materials and Metallurgical Engineering

Carbon Soot As A Potential And Sustainable Source Of Porous Nanostructure For Energy Storage

ABSTRACT There is a need for efficient energy storage to meet the world’s continuous demand for energy. The electrical energy storage devices available are conventional capacitors, electrochemical supercapacitors, batteries and fuel cells. The electrode materials play an important role in improving the efficiency of energy storage systems such as batteries and electrochemical supercapacitors. The electrochemical supercapacitors have power densities greater than those of batteries, energy d...

Structural And Mechanical Properties Of Termite Soil As A Partial Replacement To Cement

ABSTRACT Materials selection is done regarding to the availability, cost and performance of the candidates. In buildings, cement is the material that is widely used, even though it is releases co2 (estimated about 7% of the worldwide production of co2). There is therefore a need to look for new materials that are more environmental friendly. Prior research on earth-based materials has shown that termite soil may serve as an alternative to cements in the stabilization of building materials. T...

Abrasive Wear Studies Of Pack Cyanided Mild Steel (PCMS)

ABSTRACT This work aimed at using processed cassava leaves to pack cyanide mild steel (MS) under different treatment conditions and investigating the wear properties of the pack cyanided mild steel (PCMS). Pack cyaniding (PC) of a MS was achieved using processed cassava leaves powder with BaCO3 as energizer in the heat treatment process. Four different powder particle sizes were utilized at four different temperatures (750oC, 800oC, 850oC and 900oC) and soaked for 3 hours. In this present wo...

Investigation Of Stress Corrosion Cracking Of Storage Tanks Used To Store Methanol For Gas Hydrate Inhibition

ABSTRACT Methanol is normally used in the oil and gas industries for inhibiting gas hydrate. Before use, the methanol is normally stored in tanks often made of carbon steels and stainless steels, and these tanks are prone to corrosion when exposed to methanol. Many investigations have been carried out by researchers to understand the phenomenon of stress corrosion cracking (SCC) in ethanol. Very few investigations have, however, been carried out on methanol stress corrosion cracking. Even th...

Activated Carbon From Plant-Biomass Waste Materials As Promising Electrodes For Supercapacitor Applications

ABSTRACT This work is aimed at studying activated carbons as supercapacitor electrode materials derived from plant biomass waste materials. The activated carbon raw materials are sourced from coconut shell, pine cone and rice husk plant biomass. The chemical activation route is employed with KOH as an activating agent. The carbonization temperature used is 800 oC and the carbonization time is varied from 1 h to 5 h. Activated carbon of high surface area and porosity are achieved and their el...

Prodigiosin Encapsulated Poly Lactide-Co-Glycolide (PLGA)- Coated Stent For Coronary Cardiovascular Interventions

ABSTRACT This research focuses on the design of a robust but flexible prodigiosin eluting stent coating for possible coronary cardiovascular implant. When coated with the drug embedded polymer matrix, the stent would be expected to dilate the vessel around the fatty blockages while the drug eluting polymer membrane delivers anti-proliferative drugs over a period of time to prevent the restenosis that otherwise would occur. The goal of this work is to incorporate anti-cancerous drug prodigios...

Failure Mechanisms Of Epoxy Coatings In Pipelines

ABSTRACT Epoxy, a thermosetting polymer due to its attractive properties, has been widely used in many industries as a coating material such as the oil and gas industries. This study provides an insight into the corrosion behavior of epoxy looking at its adsorption properties at the epoxy steel interface and the adhesion behavior for different corrosion environments. The study was carried out using conventional weight-loss measurements and microscopic observation after immersion in Hcl of va...

Strength And Fracture Of Earth-Based And Natural Fiber-Reinforced Composites

ABSTRACT This study examined the mechanical properties of earth-based materials that are relevant to the future development of affordable housing. Earthcrete structures were produced by mixing various proportions of laterites, clay and cement, while natural fibre-reinforced composites were produced by mixing earth-based matrices with natural fibre (Straw). Mechanical testing showed that optimum performance of the various samples was obtained at a fibre content of 20% by volume, with compress...

Design, Construction And Evaluation Of Charcoal, Activated Carbon, Moringa Seed And Sand Water Filtration Systems

ABSTRACT The majority of human population especially in developing countries suffers from waterborne diseases such as skin abscesses, cellulitis, skin infections, and diarrhoea due to improperly treated water. Safe drinking water remains unavailable to a large portion of the global population and this is a global concern. This work focused on the design, construction and evaluation of charcoal, activated carbon, Moringa seed and sand water filtration systems with an objective of evaluating t...

Effects of Bending and Stretching on Hybrid Organic- Inorganic Trihalide Perovskite Solar Cells

Abstract In the recent decade, hybrid organic- inorganic trihalide perovskite solar cells have attracted significant interest from the scientific community due to their unique optoelectrical properties, ease and low cost of fabrication. Extensive research has been carried out to understand the electrical and optical properties of this novel material with a view to boosting the efficiency of the system. However, not much has been done to understand the mechanical properties of the system. The...

Assessment Of Heavy Metal Pollution In Soil And Surface Water In Mng-Gold, Kokoya District, Bong County, Liberia

ABSTRACT The presence of heavy metals in water and soil by metalliferous mining activities at MNG-Gold Mine was fully investigated. The extraction of gold in recent years, has led to the generation of huge quantities of solid and liquid wastes. During the course of the investigation, fourteen samples including surface water, groundwater and soil were collected and analyzed to determine physio-chemical parameters and heavy metal contents. Atomic Absorption spectrometer (AAS FS 240) was used t...

Adhesion And Optoelectronic Properties Of Organic Light Emitting Devices (OLEDs) And Hybrid Organic-Inorganic Light Emitting Devices (HOILEDs) With TiO2 Nano-Particles

ABSTRACT This study examines the basic operation of an Organic Light Emitting Device (OLED) and Hybrid Organic-Inorganic Light Emitting Devices (HOILED) by looking at the individual characteristics of the each layer which makes up the entire device. Adhesion analysis and different types of layer characterization were carried out. First of all, the material of interest was deposited on AFM tips, clean 1 sq. inch glass substrates and ITO-coated glass with subsequent final fabrication of the de...

Implantable Composite Devices for the Localized Treatment of Breast Cancer

Abstract Current standard of care treatment modalities for early-stage breast cancer typically involve mastectomy or lumpectomy followed by radiation therapy to remove any residual cancer cells. Although mastectomy has a low recurrence rate, it is an aggressive form of treatment for early-stage breast cancer. Therefore, there is a need for the development of new strategies that could increase the use of lumpectomy by eliminating residual cancer cells to reduce local recurrence with limited s...

A Study Of The Pre-Treatment Temperature Of Lignocellulosic Butanol As An Alternative Fuel (Biofuel) Produced From Bamboo Using Clostridium Acetobutylicum

ABSTRACT Conversion of lignocellulosic biomass from bamboo (Bambusa vulgaris) to butanol is an important alternative energy source. In this work, bamboo was used as biomass feedstock for the production of butanol by the fermentation of sugars. Mechanical grinding was carried out, followed by pre-treatment with dilute sulfuric acid concentration of 0.5 and 1.0 (%v/v). This was done at temperatures of 25, 110, 120, 150 and 2000C at time intervals of 2 and 4 hours. Prehydrolysate was later anal...

Utilisation Of Rice Husk Ash (RHA) In The Production Of Magnesium Oxide (MgO)-Based Cement

ABSTRACT The use of Magnesium oxide (MgO) cement as a full replacement and viable alternative for Ordinary Portland Cement was studied. Rice husk, an agricultural waste, was calcined and synthesised to be used as a source of silica and a pozzolan in the production of this cement. Rice husk ash (RHA) of various particle sizes (45, 106 and 150 μms) was used and varying dosages of superplasticiser were also used to alter the water to cement (w/c) ratio of the cement. The MgO/SiO2 ratio at 60% ...


76 - 90 Of 130 Results