School of Materials Engineering (Articles): Recent submissions
Now showing items 421-440 of 553
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Fly ash porous material using geopolymerization process for high temperature exposure
(MDPI AG (Basel, Switzerland), 2012-04)This paper presents the results of a study on the effect of temperature on geopolymers manufactured using pozzolanic materials (fly ash). In this paper, we report on our investigation of the performance of porous geopolymers ... -
Evidence of Coulomb correction and spin-orbit coupling in rare-earth dioxides CeO2, PrO2 and TbO2: An ab initio study
(Elsevier B.V., 2012-04)The current study investigates the structural, elastic, electronic and optical properties of CeO 2, PrO 2 and TbO 2 using the full potential (linearized) augmented plane wave plus local orbital method within the WuCohen ... -
Fly ash-based geopolymer lightweight concrete using foaming agent
(MDPI, Basel, Switzerland., 2012-06)In this paper, we report the results of our investigation on the possibility of producing foam concrete by using a geopolymer system. Class C fly ash was mixed with an alkaline activator solution (a mixture of sodium ... -
Mechanical properties and fracture behaviour of coconut fibre-based green composites
(Foundation for Materials Science and Engineering “Serban Solacolu”, 2012)This paper presents the influence of natural fibre content on the mechanical properties of coconut fibre based-green composites. The mixture ratio of cement:sand by weight was fixed at 1:1. Coconut fibre was used as ... -
Compressive strength and crack propagation of cement composites reinforced coconut fibre
(Medwell Journals, 2012)This study presents the compressive strength and crack propagation of cement composites reinforced coconut fibre. The development of cement composites in this research were done by substituting coconut fibre to the portion ... -
The influence of curing periods on the compressive strength of fly ash-based geopolymer at different aging times
(Trans Tech Publications, 2012)The results of the current experimental investigation indicate the significant effect of the heating periods on the compressive strength of fly ash-based geopolymers prepared at different alkaline liquid content at both ... -
Investigating the possibility of utilization of kaolin and the potential of metakaolin to produce green cement for construction purposes-A review
(INSInet Publication, 2011-09)Geopolymers are inorganic alkali aluminosilicate gels, formed from reaction of mineral clays or aluminosilicate-bearing industrial wastes, and treated with alkali silicate solution at 40-80°C. Geopolymers have been studied ... -
Potential application of kaolin without calcine as greener concrete: A review
(INSInet Publications, 2011-07)Kaolin is a white raw material that has an essential constituent which makes it ideal for industrial applications such as green concrete. Based on a historical review, it appears that green polymeric composites created by ... -
An electrochemical impedance spectroscopy study of Al-Zn and Al-Zn-Sn Alloys in tropical seawater
(Trans Tech Publications, Switzerland, 2012)In this paper, a study on the electrochemical behaviour and electrical properties of Al-Zn and Al-Zn-Sn alloys in tropical seawater using open circuit potential (OCP) measurement and electrochemical impedance spectroscopy ... -
Fluorescent and nonlinear optical features of CdTe quantum dots
(Springer Science+Business Media, LLC., 2012-02)The study of photoluminescence and nonlinear optical properties of red (emitted at 650 nm), yellow (emitted at 570 nm) and green (emitted at 530 nm) CdTe quantum dots (QD) spin coated on quartz substrate that had been ... -
Characterization of Cu2O thin films with addition of additive prepared by sol-gel spin coating process
(Universiti Putra Malaysia, 2010)Cuprous Oxide (Cu2O) thin films were formed onto indium tin oxide (ITO) coated glass substrate by sol-gel spin coating technique using different additives namely polyethylene glycol and ethylene glycol. It was found that ... -
Optimization of alkaline activator / fly ash ratio on the compressive strength of manufacturing fly ash-based geopolymer
(Trans Tech Publications, 2012)Fly ash and a mixture of alkaline activators namely sodium silicate (Waterglass) and sodium hydroxide (NaOH) solution were used for preparing geopolymer. The aim of this research is to determine the optimum value of the ... -
Fabrication and mechanical properties of composite palm ash mixed with phenolic resins
(International Network for Scientific Information Publication (INSI), 2011-11)Brake pad is one of the important engineering components in automobile and it is fabricated by combination of various materials. Asbestos is one of the components in brake pad that is harmful to the human. In this ... -
Effects of dynamic vulcanization on thermal properties of calcium carbonate filled polypropylene/ethylene propylene diene terpolymer composites
(Universiti Putra Malaysia Press, 2010-07)In this study, dynamic vulcanization process was used to improve the thermal properties of calcium carbonate filled composites. The composites were prepared using a Z-blade mixer at 180°C and rotor speed 50rpm. Thermogravimetric ... -
Wettability, electrical and mechanical properties of 99.3Sn-0.7Cu/Si 3N4 novel lead-free nanocomposite solder
(Trans Tech Publications, 2011-07-04)A nanocomposite solder alloy with 99.3Sn-0.7Cu base alloy was successfully fabricated using the powder metallurgy route which consists of blending, compaction and sintering. Varying amount of nano size silicon nitride ... -
Effect of Mg, Si and Cu content on the microstructure of dilute 6000 series aluminium alloys
(Elsevier B.V., 2011-09-01)The effect of Mg, Si and Cu content on the microstructural development during ageing treatment of dilute 6000 series alloys have been investigated using transmission electron microscopy (TEM). Four dilute alloys were used ... -
Chemical modification of chitosan-filled polypropylene (PP) composites: The effect of 3-aminopropyltriethoxysilane on mechanical and thermal properties
(Taylor & Francis Group, 2011-01)Chitosan was used as filler in polypropylene (PP) polymer. In order to improve compatibility between chitosan and PP, chitosan was chemically modified with 3-aminopropyltriethoxysilane (3-APE). The results show that the ... -
First principles study of structural, electronic and magnetic properties of Mg1-xMnxTe alloys
(Elsevier B.V., 2011-08-11)Density functional FP-LAPW + lo calculations have been performed to study the structural, electronic and magnetic properties of Mg1-xMn xTe for compositional parameter x = 0.25, 0.50, 0.75 and 1. Our calculations reveal ... -
Mechanical properties of nanosilica/polypropylene composites under dynamic compression loading
(Society of Plastics Engineers, 2011-04)This article presents results on the dynamic mechanical properties of PP-SiO2 nanocomposites, with nanosilica contents of 1, 3, and 5% by weight, at various strain rates using a Split Hopkinson Pressure Bar (SHPB) apparatus. ... -
Measurement and prediction of compressive properties of polymers at high strain rate loading
(Elsevier Ltd., 2011-09)Strain-rate effect is widely recognized as a crucial factor that influences the mechanical properties of material. Despite the acknowledge importance, the understanding of how such factor interact with the sensitivity of ...