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Browsing Material Science & Engineering by Issue Date

Now showing items 1-20 of 63

Stable ternary nanocomposites of Multi walled Carbon nanotube/ Polyaniline/ Hydroquinone: electrodes for Supercapacitors Thesis

Gutema Teshome (2018)

Multi-walled carbon nanotubes (MWCNTs) are widely used as supercapacitor electrode material. However, the specific capacitance of MWCNTs cannot achieve optimum value to facilitate required demand. Conducting polymers ...
Effects of firing temperature, and ratio of steel/iron slag on the mechanical and physical properties of clay bricks, the case of Jimma town Thesis

Bane Ibsa; Zekarias Gebreyes (2020-08)

A construction brick made from clay soil and iron slag with variable temperature has been synthesized. In the process iron slag was collected from steely RMI Bishoftu Ethiopia and clay soil was taken from Jimma town ...
Tuning the Thermoelectric Transport Properties of Pseudo-Binary Cu2Te - Sb2Te3 System by Unidirectionally Solidification and Brine Quenching Thesis

Surafel Shiferaw; Olu Emanuel; Kamanio Chattopadhyay (2020-08)

The rapidly depleting available energy resources have led to an increased research focus on the development of alternative energy sources. In this aspect, research on the development of efficient thermoelectric (TE) ...
‘Synthesis And Characteriation Of Low Dimensional Metal-Organic Framework Type Catalyst For Facile Generation Of H2 Fuel By Electrolysis’’ Thesis

Adem Ahmed; Prabal Dasgupta; Olu Emmanuel (2020-08)

The increase in world’s energy consumption during the last decades is a result of both the global rise in population and of the changes in the standard of living. Indicatively, the average global power demand is predicted ...
A Novel Method of Pack Nitriding of AISI 1018 and 1045 Steels Using Melamine Derived from Urea Thesis

Elias Tadesse; Prabal Dasgupta; Femi Olu (2020-08)

Steels are one of the most broadly used ferrous metallic engineering materials used in many application. Example medium carbon steels are used in gears, railway wheels and tracks, crankshafts, axles, and other structural ...
Electrocatalytic Investigation of M@Pd (M=Ni, Co, Cu) Core-Shell Nanostructure Supported on N, S-Doped Reduced Graphene Oxide towards Hydrogen and Oxygen Evolution Reaction Article

Woldetinsay, Mengistu; Femi, Olu; Soreta, Tesfaye R.; Maiyalagan, Thandavarayan (2020-08-24)

The strong affinity of palladium (Pd) towards hydrogen is the main challenge for hydrogen desorption application. Therefore, in this report, we synthesized nickel, copper, and cobalt core and palladium shell nanostructure ...
Study On Mechanical Properties And Thermal Stability Of Al-Xco-0.15(Sczr), X=0.1, 0.2, And 0.3 Thesis

Eyerus Mulugeta; Olu Emmanuel (2020-11)

Al alloys play important role in modern engineering applications due to low density, functional strength, and corrosion resistance because of the corrosion inhibiting oxide layer. Al-alloys are now being a major part ...
Synthesizing High Strength Biodegradable Polymer Film from Ethiopian False Banana Pseudo stem. Thesis

Hawi Ketema; Lodrick Wangatia (2020-11)

Ethiopian false banana, locally known as “enset”, is an indigenous vegetable tree native to southern Ethiopia and mainly utilized as food source. In this thesis work, we investigated the possibility to use cellulose ...
Investigations of the effect of Fe and Ni addition on the PbTe interfacial reactions Thesis

Chaltu Abebe; Olu Emmanuel (2020-11)

PbTe based thermoelectric generators are widely employed by the United States Army in space crafts to supply on-board power, and in pacemakers batteries, it's one among the widely used thermoelectric semiconductor ...
Improving purity and conductivity of scrap melted aluminum conductor by using pre-melt and in-malt technique Thesis

Ismail Kamil; Prabal Dasgupta; Olu Emmanuel (2021-01)

Aluminum recycling has a number of key environmental and economic benefits. With this energy and cost saving in mind, BMETcable industry now has target increasing its usage of secondary materials and its profit. However, ...
Effect of Microwave Irradiation on Structure and Properties of Poly (ethylene terephthalate) (PET) Thesis

Gemechu, Tigist Merga; Hussain, Rabiul (2021-04-02)

The application of microwave energy on polymers has got huge interest in the field of organic chemistry. Industrial use of microwave radiation as an alternative to conventional thermal heating has generated interest ...
IMPROVING HYDRATION TIME AND COMPRESSIVE STRENGTH OF ETHYLENE-VINYL ACETATE POLYMER-MODIFIED CEMENT USING EGGSHELL ASH Thesis

Bekele, Tadelech Tesfaye; Wangatia, Lodrick (2021-04-11)

Polymers added to cement to enhance its physical properties retards its hydration reaction and reduces its compressive strength. Eggshell ash added to polymer-modified cement to enhance its physical properties can ...
Effect of A-site off-stoichiometry on the microstructural, structural, and electromechanical properties of lead-free tetragonal 0.80Na0.5Bi0.5TiO3–0.20BaTiO3 (NBT–20BT) piezoceramic Article

Mishra, Anupam; Abebe, Getaw; Jafo, Gudeta; Adhikary, Gobinda Das; De, Arnab (2021-04-20)

A-site off-stoichiometry has been an efficient method to enhance the elec tromechanical properties of lead-free Na0.5Bi0.5TiO3(NBT)-based piezoceramics. In this work, we have reported the effect of Na/Bi off-stoichiometry ...
FATIGUE ANALYSIS OF STEAM TURBINE BLADE (STB) CASE STUDY: FINCHAA SUGAR FACTORY Thesis

Feyisa, Mr. Moti Tekalign (2021-06-18)

T he steam turbine handles the maximum power demand among all stationary prime movers that are used for electric power generation. A steam turbine is a constant volume machine. There are two basic types of steam turbines. ...
Low temperature sintering of (Ba0.85Ca0.15) (Ti0.90Zr0.10)O3 lead-free piezoceramic with the additive of MnO2 Article

Mekonnen, Mulualem Abebe; Tadesse, Mesfin Zewdu (2021-06-24)

Lead-free (Ba0.85Ca0.15) (Ti0.90Zr0.10)O3 (15/10 BCZT) piezoelectric ceramics were prepared by a standard solid solution and sintered at different temperature of 1300 °C and 1500 °C at a time. The 15/10BCZT piezoceramics ...
Computational study of the effects of Sr-dopant on the lattice thermal conductivity of Mg2Si thermoelectric material Thesis

Degefa, Dita Deme (2021-07-01)

Due to its high abundance, low density, non-toxic nature, and low cost of production, Magnesium Silicide is very important for thermoelectric applications. In recent years enormous investigations have been done to ...
EFFECT OF MAGNESIUM SUBSTITUTION ON THE STRUCTURAL, OPTICAL AND MAGNETIC PROPERTIES OF NICKEL-ZINC NANOFERRITE PREPARED BY SOL–GEL COMBUSTION METHOD Thesis

TEGEGN, MIHRET (2021-07-02)

Ni0.6Zn0.4-xMgxFe2O4 (x = 0.0, 0.1, 0.15, and 0.2) nanoferrites were successfully synthesized by the sol-gel combustion method. The structural, optical and magnetic properties of these materials were investigated using ...
Recent progress in electron transport bilayer for efficient and low‑cost perovskite solar cells: a review Article

Lachore, Wegene Lema; Andoshe, Dinsefa Mensur; Mekonnen, Mulualem Abebe; Hone, Fekadu Gashaw (2021-10-05)

Today, organic–inorganic perovskite hybrid solar cells are especially attracted by the energy industries to design and develop new-generation photovoltaic devices. They are the most promising materials for high PCE and ...
Anisotropy of Microstructure and Its Influence on Thermoelectricity: The Case of Cu2Te−Sb2Te3 Eutectic Article

Mukherjee, Shriparna; Aramanda, Shanmukha Kiran; Legese, Surafel Shiferaw; Riss, Alexander; Olu, Gerda Rogl; Femi, Emmanuel; Bauer, Ernst; Rogl, Peter Franz; Chattopadhyay, Kamanio (2021-10-14)

Using a set of controlled in situ grown lamellar composites of (Cu2Te)62.02−(Sb2Te3)37.98, we report a remarkable variation of transport properties of thermoelectricity not only as a function of microstructural length ...
Effect of Temperature on Cu (Se, S) for the Degradation of Methylene Blue in Aqueous Solution Thesis

Tereda, Ribka Habteyesus (2021-10-30)

Water pollution is one of the biggest problems in the world nowadays. Among various contaminants at about 20% of the water pollution is caused by organic dyes. Organic dye removal from different sources has never been ...

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