Abbreviation: J. Chem. Eng. Mater. Sci.
Start Year: 2010
Page 1 of 4, showing 20 records out of 76 total, starting on record 1, ending on 20
https://doi.org/10.5897/JCEMS2017.0303[Article Number: 2BCCCC266667]
In the presented study, by applying analytical methods and using experimental data, equations are achieved to predict the fatigue life of unidirectional carbon fiber/epoxy composite (UCFEC) that is applied in aerospace structures. The experimental data used to obtain these equations are achieved by low earth orbit (LEO) environment simulation experiment and other experiments. By employing convex curves analytical... Read more.
https://doi.org/10.5897/JCEMS2017.0306[Article Number: 3BA635166669]
The most important target of this study is to develop a method to compare the materials’ degradation due to thermal fatigue and temperature variation between the carbon nanotube wire and unidirectional carbon fiber/epoxy composite (UCFEC). In the presented study, by using experimental results data, thermal fatigue life of carbon nanotube wire and unidirectional carbon fiber/epoxy was compared after being exposed... Read more.
https://doi.org/10.5897/JCEMS2016.0282[Article Number: 438B1FC66341]
The significant goal of this study is to develop a system to determine the margin of safety for ME3 super alloy in aerospace gas turbine engines. This margin of safety can be defined as critical temperature, force stress, exposure time, and cycles. In this research, by applying analytical solutions and using experimental data, equations are obtained to predict the life of a nickel-base super alloy in aerospace gas... Read more.
https://doi.org/10.5897/JCEMS2017.0290[Article Number: CD218FB66454]
Natural fiber reinforced polymer (NFRP) composites have been a focus of various research projects because of their advantages compared to traditional fiber reinforced plastics. In this study, Anahaw (Saribus rotundifolius) was used as fiber source because it is abundant in the Philippines. The fibers were treated by immersing in a sodium alginate solution and then in a calcium chloride solution. The treated fibers were... Read more.
https://doi.org/10.5897/JCEMS2017.0291[Article Number: 34E699265642]
This research aims to investigate the inﬂuence of production conditions on the quality of aluminium casting with open-cell aluminium foam core. Open-cell aluminium foams were produced using vacuum pressure to aid molten metal to be fill into space of water-soluble space holders to obtain aluminum foams with specific pore sizes. The produced foams were then used as cores for castings. Optical microscope was employed for... Read more.
https://doi.org/0.5897/JCEMS2016.0281[Article Number: E3E4D8665364]
The presented study aims to investigate the role of nano-carbon percentage on material properties of different composites. Recently, nano-carbon composites are used in different industries like aerospace. Thus, it seems necessary to determine the best amount of nano-carbon in composite materials. The best percentage of nano-carbon can be defined as the amount that causes an increase in some of the useful... Read more.
https://doi.org/10.5897/JCEMS2016.0283[Article Number: DDEC89364860]
The main objective of this paper is to develop a method to predict the crack length and crack growth rate in unidirectional carbon fiber/epoxy composite as a function of temperature variation. In order to measure the crack length and crack growth rate, a new analytical method by applying experimental procedure data is developed. By the novel analytical method, relations are achieved to predict the crack length and crack... Read more.
https://doi.org/10.5897/JCEMS2017.0293[Article Number: 483F55964391]
In this study, the photocatalytic oxidation by UV-activated TiO2 was investigated for the degradation of a 15 mgL-1 solution of 17 α-ethinylestradiol (EE2) in an ultra-pure water matrix. The TiO2 adsorption, solution pH and catalyst TiO2 concentration were evaluated. Operating as a batch reactor, the system showed a 90% removal, with a 40-min retention time, a pH value of 8 a TiO2 concentration of 0.1 gL-1, and a... Read more.
https://doi.org/10.5897/JCEMS2016.0274[Article Number: 49F025162685]
Nowadays, polyvinyl chloride (PVC) is the most usual plastic. Therefore, to make PVC, its monomer called vinyl chloride (VCM) must be produced first. It is a severely endothermic reaction that is done in an ethylene dichloride thermal cracking reactor within a temperature range of 680 to 758°K and pressure range of 2500000 Pascal. Thus, this cracking reaction changes into hydrochloric acid and VCM. In production... Read more.
https://doi.org/10.5897/JCEMS2016.0237[Article Number: 9D293F560977]
A new constitutive equation is developed to model the flow stress on a metal surface undergone high speed impacts that result in strain hardening. The new equation is based on the Johnson-Cook model and has considered the effects of strain, strain rate, grain refinement, twin formation and twin spacing. Two mechanisms for the strain hardening are proposed: Grain refinement or twin formation, depending on the strain... Read more.
https://doi.org/10.5897/JCEMS2015.0231[Article Number: 7E1715F59501]
The objective of this study was to determine the potential of using Malaysian silica sand as the SiO2 raw material in producing leucite (SiO2-Al2O3-K2O) glass-ceramics. The crystallization, mechanical and biological properties of the glass-ceramic was studied. A starting glass composition in the system of leucite was melted in an electric furnace, quenched in deionized water and dry milled to obtain glass powder. The... Read more.
https://doi.org/10.5897/JCEMS2016.0252[Article Number: BF8C0B859503]
Polymer modified concrete is one of the alternative material of construction to obtain better performance in strength and durability of concrete. There are some types of PMC such as natural rubber, synthetic rubber, modified rubber and asphalt. In this work, copolymer of natural rubber styrene and copolymer of natural rubber methacrylate were used as PMC added to Portland cement concrete and Portland Pozzolan... Read more.
https://doi.org/10.5897/JCEMS2015.0235[Article Number: 46D281B59460]
Chitosan is a natural polymer gotten from shrimp and crab skeleton; chemical structure of chitosan is similar to cellulose where hydroxyl (OH) in glucose molecule in cellulose is replaced by amine (–NH2) in chitosan. From the chemical structure and its properties, chitosan can be used as a filler and adhesive to replace the traditional materials and it will improve several properties of papers such as to increase... Read more.
https://doi.org/10.5897/JCEMS2015.0221[Article Number: BC8E1C655527]
This study investigated how 0.33% medium carbon steel is affected by induced stress in a saline environment. Three geometries namely U-bend, C-ring and I-shape samples were formed representing varying degrees of stress level induced on the samples. The test specimens were subjected to static loading in saline environment containing 15.0 wt.%, 10.0 wt.% and 3.5 wt.% of sodium chloride (NaCl) for a typical exposure time... Read more.
https://doi.org/10.5897/JCEMS2015.0212[Article Number: 8F82FDC54973]
Acid mine drainage (AMD) is detrimental to both humans and the ecosystem, and contains sulphuric acid and heavy metals, which have to be removed by dosing the coagulants. A 200 mL sample of AMD, emanating from a mining area in South Africa was poured into 500 mL glass beakers or Erlenmeyer flasks and were dosed with 0.043 M Ca(OH)2, 0.043 M Mg(OH)2 and synthetic 0.043 M CaMg.2(OH)2 and treated in a jar test or shaking... Read more.
https://doi.org/10.5897/JCEMS2015.0217[Article Number: 329492854976]
The acid mine drainage (AMD) was poured into five 500 ml glass beakers. The samples were dosed with synthetic af-PFCl of Ca(OH)2 and af-PFCl of CaCO3 polymers respectively. The samples were treated in a jar test and a shaker at 250 rpm for 2 min, and thereafter were allowed to settle for an hour after which the pH, conductivity and turbidity (TSS) were measured. A similar second set of experiments was conducted by... Read more.
https://doi.org/10.5897/JCEMS2015.0219[Article Number: 11AB3A554117]
Activated carbons were prepared by phosphoric acid activation of Canarium Schweinfurthii spent nutshell. The activation conditions for particles with average diameter of 2.36 mm, conducted in nitrogen chamber, were evaluated at 40 and 60% acid concentration, substrate/activating agent (impregnation) ratio of 1:1 to 1:4, activation time of 20 to 60 min and temperatures of 200 and 400°C. The results showed that... Read more.
https://doi.org/DOI 10.5897/JCEMS2014.0199[Article Number: 7DCF17C52283]
A transient model for an industrial fluid catalytic cracking (FCC) riser is here presented. The FCC riser models of previous researchers were mostly based on the assumption of negligible mass transfer resistance. This assumption reduced the accuracy of the models. In this work, the effects of mass transfer resistance and coking on the yield of FCC reactions were modeled and simulated. A five-lump reaction scheme was... Read more.
https://doi.org/10.5897/JCEMS2014.0186[Article Number: BD881E348240]
Unsaturated polyester was modified with dioctyl phthalate (DOP) and used as matrix in glass fiber reinforced composite. The effect on the thermal stability of the composite was studied in this work. The results of the modification showed that modified matrix had the best thermal stability at 5 wt% DOP with temperature of 373°C at 20% weight loss as compared with unmodified of temperature of 346°C at the same... Read more.
https://doi.org/DOI 10.5897/JCEMS2014.0166[Article Number: 69AE5F547546]
The production of steel from the locally available Itakpe Iron Ore in Nigeria was achieved in the Delta Steel Direct Reduction-Electric Arc Furnace Plant. The ore was originally thought to be unsuitable for use in the direct reduction process due to its low total iron content, less than 64% and high gangue content which was in excess of 4% and above the maximum acceptable limit of 3.5%. Pilot and Plant tests were... Read more.
Page 1 of 4, showing 20 records out of 76 total, starting on record 1, ending on 20