Research Papers/Topics in Materials And Metallurgical Engineering

Use Of Local Clays For The Production Of Porcelain Pin Insulators

ABSTRACT The use of local clays for the production of porcelain pin insulators was investigated. Clays from Awo-omama, Ibere and Nsu were used for the study. Test samples were made by varying the compositions of feldspar and quartz needed to form a mouldable plastic body with each clay. The following properties were determined: electrical resistivity, apparent porosity, water absorption, bulk density, linear shrinkage as well as crystalline phases produced after firing. This character...

The Effect Of Particle Size And Particle Size Distribution On The Modulus Of Rupture Of Some Nigerian Clays

ABSTRACT The effects of particle size and particle size distributions of three clay samples, on their modulus of rupture were studied. The three clay samples were collected from natural clay deposits at Nsu; OhiyaUmuahia; and Awo-Omamma all in south eastern Nigeria. The particle size analysis of the clay samples was done by laser diffraction in wet suspension mode and the results disclosed that Awo-Omamma clay has greater proportion of the larger sized particles, (21µm - 25µm) and (25...

Study Of The Properties Of Some Local Clays For The Production Of Floor Tiles

ABSTRACT The suitability of some clay deposits in South Eastern Nigeria (Unwana, Ekebedi, Okigwe and Nsu) as materials for the production of floor tiles was investigated. The clay samples were analyzed using wet classical method to determine their chemical composition. Floor tile test specimens were produced using standard method. The test specimens were tested for physical properties such as compressive strength and porosity at 10500 C and 11500 C temperature levels. The chemical a...

Inhibition Of The Corrosion Of Mild Steel In Acidic Environment Using Azadirachta Indica (Neem) Leaf Extract As Inhibitor

ABSTRACT The inhibition of corrosion of mild steel by Azadirachta indica leaf extract in acidic environments of HCl and HNO3 from pH1 to pH6 has been investigated using the weight loss technique. The Azadirachta indica leaf extract is the inhibitor and the mild steel used was in the form of coupons. The investigations were carried out at ambient temperature. The optimum concentration of the extract used for the experimentation was obtained by soaking 200g of ground fresh Azadirachta in...

Factors Affecting The Colour Yield Of An Acid Dye On Nylon Fabric

ABSTRACT The factors that affect the colour yield of an acid dye on nylon fabric were investigated at a constant temperature of 500C, usingC.I. Acid Yellow 23,with citric acid and sodium chloride as auxiliaries. It was observed from the absorbance results that the colour yield of C.I. Acid Yellow 23 improved with increase in time of dyeing, while the absence or increase beyond 1% (acid) and 5% (salt) reduced the colour yield of the acid dye on the nylon fabric. Also, at a constant dyei...

Effect Of Cooling Rate And Modification On The Microstructure And Tensile Properties Of Al-Si-Mg Alloy

ABSTRACT The effect of cooling rate and modification on the microstructure and tensile properties of Al-Si-Mg alloys was carried out. Castings were produced using a stepped pattern that has different section thicknesses. Sand casting technique was used. A thermocouple inserted into the mould cavity recorded the cooling rates for the different sections. The Al5.43%Si3.83%Mg which was melted in the crucible furnace was modified with sodium (Na) and strontium (Sr) in separate cases. The m...

Bacteria Corrosion Of Mild And Medium Carbon Steels

ABSTRACT Investigations were carried out to determine the corrosion effect of sulphur-reducing bacteria on mild and medium carbon steels. Specimens were exposed to anaerobic, aerobic and distilled water environments. The corrosion rates were evaluated at intervals of seven days using weight loss and electro-chemical methods for a period of forty two days. The specimens were also subjected to visual examination and the result indicated uniform corrosion in all the environments. In all ...

Design, Construction And Testingof A Crucible Furnace

ABSTRACTThis research work presents the design concept, construction and testing of portable cruciblefurnace which uses diesel oil as fuel. The diesel fired crucible furnace was designed, constructedusing locally available engineering materials mild steel sheet of 1.5 mm, the materials used in thiswork were obtained from the local markets within Akure and Lagos. They include: mild steel sheetof 1.5mm thickness, compressor pot, stainless steel pipe of 60mm diameter, refractory material...

Design, Construction And Testing Of A Crucible Furnace

ABSTRACTThis research work presents the design concept, construction and testing of portable cruciblefurnace which uses diesel oil as fuel. The diesel fired crucible furnace was designed, constructedusing locally available engineering materials mild steel sheet of 1.5 mm, the materials used in thiswork were obtained from the local markets within Akure and Lagos. They include: mild steel sheetof 1.5mm thickness, compressor pot, stainless steel pipe of 60mm diameter, refractory materi...

Characterization Of The Mechanical Proper Ties Of Unsaturated Polyester Reinforced With Varying Fraction Of Particulate Groundnut Shell

ABSTRACTThe objective of this study is to produce and determine the mechanical properties as well as water absorption characteristics of unsaturated polyester-groundnut shell particle composite. The aim of the study with varying weight of groundnut shell particle is to find the composite with optimum mechanical properties. Groundnut shell of undersize particle of 300 microns was introduced at different percentages into the unsaturated polyester resin. Composites were ...

Mechanical And Microstructural Characterization Of Aluminium Metal Matrix Composite Reinforced With Particulate Periwinkle Shells

ABSTRACTThis study is about the production and characterization of aluminium alloy-Particulate periwinkle shell composite. Composites were produced at 1 %, 5%, 10% and 15% weight fraction of Particulaf'e periwinkle shell (PPS) fillers and the aluminium alloy was cast neat at 0%PPS which served as the control. The microstructures of the composites were studied with Optical Microscopy. Mechanical properties of the composites such as tensile properties (tensile strength,...

Effect Of Heat Treatment On Corrosion Of Mild Steel Weld Metal In Cassava Juice ~

INTRODUCTION In west African and other tropical countries cassava tubers are a source of major staple foods. They are also used in the .manufacture of ethyl alcohol and the production of starch used as a binder in tablet making and as an animal feed, and are being proposed for use as an addition to wheat flour for bread making. Corrosion of mild steel machinery, storage facilities, and agricultural implements used in processing cassava roots has been widely reported by the processing...

Thermomechanical Processing And Constitutive Strength Of Hot Rolled Mild Steel

ABSTRACT This work examined thermo-mechanical and metallurgical parameters (temperature and cooling rate) that give rise to substantial improvement in the basic functional strength characteristics of high-yield reinforcing steels produced in a conventional mill. A new process tagged Temperature Tracking-Jet Water Spray (TT-JEWAS) was developed to achieve requisite in-process control of thermal variations on one hand and fast undercooling by spray quenching on the other. The alternative ...

The Effect Of Particle Size And Particle Size Distribution On The Modulus Of Rupture Of Some Nigerian Clays

ABSTRACT  The  effects  of  particle  size  and  particle  size  distributions  of  three clay samples, on their modulus of rupture were studied. The three clay samples were collected from natural clay deposits  at  Nsu;  Ohiya-  Umuahia;  and  Awo-Omamma  all  in south  eastern  Nigeria.  The  particle  size  analysis  of  the  clay samples was done...

Study Of The Properties Of Some Local Clays For The Production Of Floor Tiles

ABSTRACT  The suitability of some clay deposits in South Eastern Nigeria (Unwana, Ekebedi, Okigwe and Nsu) as materials for the production of floor tiles was investigated. The clay samples were analyzed using wet classical method to determine their chemical composition. Floor tile test specimens were produced using standard method. The test specimens were tested for physical properties such as compressive strength and porosity at 10500C and 11500C temperature levels. The chemical an...


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