Now showing items 368-387 of 561

    • On the structure of shape memory alloys 

      Cristian Acitei, Dragos; Victor Sandu, Andrei; Mohd Mustafa Al Bakri, Abdullah; Petrica, Vizureanu; Alida, Abdullah (Trans Tech Publications, 2013-12)
      The paper presents the obtaining of shape memory alloys, base copper and a diffractometer and microscopic study on some samples. The study was made on CuZnAl samples, obtained by classic casting and educated. The shape ...
    • Optical and photoconductivity spectra of novel Ag 2In 2SiS 6 and Ag 2In 2GeS 6 chalcogenide crystals 

      Chmiel, M.; Piasecki, M. M; Lakshminarayana, G.; Reshak, Ali Hussein, Prof. Dr.; Parasyuk, O. G. (Elsevier B.V., 2012-06)
      Complex spectral studies of near-band gap and photoconductive spectra for novel Ag 2In 2SiS 6 and Ag 2In 2GeS 6 single crystals are presented. The spectral dependences of photoconductivity clearly show an existence of ...
    • Optimal coefficient of friction onartificial knee joint contact surfaces 

      Mohd Hafis, Sulaiman; Nur Farahana, Ramli; Mohd Ridzuan, Mohd Jamir; Nur Adlina, Mohd Takhiudin (Trans Tech Publications, 2013)
      Wear generated by the presence of frictiononknee joint contact surfaces can cause debris, which may lead to failure of the artificial knee joint. In this study, the effects of friction coefficients occur on the knee joint ...
    • Optimization of alkaline activator / fly ash ratio on the compressive strength of manufacturing fly ash-based geopolymer 

      Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; O. A. K. A., Karem; Che Mohd Ruzaidi, Ghazali, Prof. Madya; Rafizah, Abu Rashid; Norazian, Mohamed Noor (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 ...
    • Optimization of solids-to-liquid and alkali activator ratios of calcined kaolin geopolymeric powder 

      Liew, Yun Ming; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Mohd Mustafa Al Bakri, Abdullah; Binhussain, M.; Luqman, Musa, Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Che Mohd Ruzaidi, Ghazali; Cheng, Yong Heah (Elsevier Ltd, 2012-12)
      This paper investigates the effect of S/L and alkali activator ratios on the synthesis of geopolymeric powder. Geopolymeric powder was synthesized by applying geopolymerization process. By adopting the concept of "just ...
    • Optoelectronic and thermoelectric properties of KAuX5 (X = S, Se): A first principles study 

      Wilayat, Khan; Ali Hussain, Reshak, Prof. Dr. (Springer US, 2014-02)
      The electronic structure as well as optical and thermoelectric properties of the orthorhombic polychalcogenides of gold KAuX5 (X = S, Se) compounds have been investigated using full-potential linearized augmented plane ...
    • Optoelectronic properties of GaAs and AlAs under temperature effect 

      Yarub, Al-Douri, Assoc. Prof. Dr.; Ali Hussain, Reshak, Prof. Dr.; Uda, Hashim, Prof. Dr. (Elsevier GmbH, 2013-08)
      An application study of optoelectronic properties as a function of the temperature for GaAs and AlAs according to our model has been presented using empirical pseudopotential method (EPM). The structural phase transition ...
    • Organic dye degradation with TiO2 catalyst/AAO template in the presence of H2O2 

      Alaba Oladeji, Araoyinbo; Mohd Nazree, Derman, Dr.; Azmi, Rahmat, Prof.; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2013)
      In this study, anodic aluminum oxide (AAO) fabricated from phosphoric acid electrolyte at ambient temperature was used as the porous template, while a sol gel procedure was used for the preparation of the TiO2 sol with the ...
    • Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite 

      Andriani, Yosephine; Jack, Kevin S.; Gilbert, Elliot P.; Edwards, Grant A.; Schiller, Tara L.; Strounina, Ekaterina V.; Azlin Fazlina, Osman; Martin, Darren J. (Elsevier Inc., 2013-11)
      Understanding the nature of mixed surfactant self-assembly on the surface of organoclays is an important step toward optimizing their performance in polymer nanocomposites and for other potential applications, where selective ...
    • The outcome of sintering parameters study toward the thermal properties of CuSiC composite 

      Mohabattul Zaman, S NS Bukhari, Prof. Madya Ir.; M.S.J. Hashmi; Dermot, Brabazon (Trans Tech Publications, 2014)
      Miniaturisation of electronic chips which have increasing functionality within the same package size has induced significant increases in requirements for extraction of heat from the integrated circuit (IC). Packaging ...
    • Overview of pathogenic micro-organisms destruction in contaminated water by oxide photocatalysis 

      Noor Azira, Mohd Noor; Muhammad Asri, Idris, Dr.; Dewi Suriyani, Che Halin, Dr.; Mohd Nazree, Derman, Dr.; Mohd Arif Anuar, Mohd Salleh (Trans Tech Publications, 2013)
      The titanium dioxide (TiO2) is a semiconductor oxide photocatalys, which is chemically and biologically inert but exhibits excellent photolytic activity in the ultraviolet (UV) region. Progress in photocatalytic water ...
    • Oxidation behavior of AISI 304 steel in presence of Na2 SO4 and K2 SO4 at 900°C 

      Mohammed Misbahul, Amin (Carl Hanser VerlagFaculty of Science, University of Maiduguri, Nigeria, 1993)
      Steels with high Cr- and Ni-contents utilized at elevated temperatures are oxidation resistant due to the formation of slowly growing, protective chromium oxide layers [1,2]. Na2SO4 or K2SO4 alone or in synergistic combination ...
    • Oxidation behavior of SAE-1053 alloy in presence of seawater 

      Mohammed Misbahul, Amin; Khairel Rafezi, Ahmad; Habsah, Md Ishak; Neelofar, Amin (INSInet Publication, 2009-01)
      The oxidation behavior of steel SAE-1053 alloy were investigated in presence of seawater at atmospheric condition. The rate of corrosion was varied with the water movements and the aeration. The scale morphologies were ...
    • Oxidation behavior of Sodium-, Calcium- and Potassium- Sulphates coated Fe-20Cr alloy at 800°C 

      Mohammed Misbahul, Amin (Chinese Electronic Periodical ServicesFaculty of Science, University of Maiduguri, Nigeria, 1997-04)
      The effect of Na2S04, CaS04,K2S04 and their mixture coatings on the high temperature oxidation behaviour of Fe-20Cr alloy at 800 C has been investigated. The data have been complemented by kinetic measurements, SEM ...
    • Oxidation behaviour of 18/8 Cr-Ni austenitic steel in presence of Na2SO4 and NiSO4 at 650 to 1000°C 

      Anees, Udin Malik; Mohammed Misbahul, Amin; Sharif, Ahmad (Carl Hanser Verlag, Germany, 1983)
      Iron based alloys containing chromium as a major constituent with nickel additions are the most prominent materials in coal fired generating units and petroleum refinery plants. The corrosion of these alloys under service ...
    • Oxidation behaviour of 8.6 Al-Cu alloy in South China Seawater 

      Mohammed Misbahul, Amin; Seoh Soo Yee; W. B., Wan Nik (Sadguru PublicationsFaculty of Science and Technology, University College of Science and Technology Malaysia, 2005)
      The corrosion behavior of 8.6 Al-Cu alloy was investigated in 4 different conditions of South China Seawater. The weight loss curve of alloy increases with time during the initial exposure period, due to dissolution of ...
    • Oxidation behaviour of AISI-304 steel in the presence of Na2S04 and Fe2(S04)3 at 973 K 

      Mohammed Misbahul, Amin (Elsevier Science B.V., 1994)
      The high temperature oxidation behaviour of AISI-304 austenitic steel was studied in the presence of Na2S04, Fe2(S04)3 or a mixture at 973 K in flowing air. The studies were carried out to examine the influence of eutectic ...
    • Oxidation behaviour of AISI-316 steel in molten ionic salts at 650-1000-C 

      Mohammed Misbahul, Amin; Ku Halim, Ku Bulat; Hamdan, Suhaimi (Journal of Ultra Scientist of PhysicalFaculty of Science and Professional Arts, Universiti Putra Malaysia Terengganu, 2000)
      Sodium sulphate (Na2S04) sodium meta-vanadate (NaV03) and its binary combination on the hot corrosion behaviour of AISI-316 steel in the temperature range 650-1000°C have been studied in flowing air The influence of ...
    • Oxidation behaviour of IN-738 LC Superalloys in the presence of Ionic Salts at 1173 K 

      Mohammed Misbahul, Amin (Portuguese Electrochemical Society, 2003)
      Oxidation of the alloy having nominal composition Ni-16Cr-8.5Co(wt.%) was studied in the presence of KCl and K2CO3 at 1173 K in air. Chemical composition of oxide scales and scale morphologies were determined by means ...
    • Oxidation behaviour of low carbon steel in natural water 

      Mohammed Misbahul, Amin; W. B., Wan Nik; Kamaruzzaman, Yunus (Oriental Science Publishing CoFaculty of Science and Technology, University College of Science and Technology Malaysia, 2002)
      Natural water pollution has been identified as a potential danger to metallic materials used under service conditions. Sea water and lake water foulants have adequate corrosive environment due to chemical ingredients ...