Advanced Materials Research

Publisher: Trans Tech Publications

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ISSN 1022-6680

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Trans Tech Publications

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    • Publisher last contacted on 27/04/2013
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Abstract. The austenisation and quenching behaviors of a medium-Mn steel with a chemical composition of C 0.14% and Mn 5.0% were presented in this paper. The heating and holding temperature varied from 500oC to 950oC was applied to find the austenization temperature. The holding time varied from 1-5minutes was used to choose the suitable austenisation time. Air cooling were applied to check the hardening capacity of the studied steel. It was found that the tensile strength is lower than 900Mpa and total elongation varied from 20-30% when the austenisation temperature is lower than 700oC. However, the tensile strength could be high up to 1600MPa and the total elongation about 12% when the austenisation temperature is higher than 700oC with air cooling. Based on the low austenisation temperature and the air hardening capacity, it was proposed that the studied medium-Mn steel could be used as the hot stamping steel in the car industry.
    Advanced Materials Research 06/2015;
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    ABSTRACT: In this research zirconium pillared saponite clay (Zr-PILS) was prepared for catalysis application. Pillarization was conducted by zirconium isopropoxide via using sol-gel mechanism and the characterization was performed by X-ray diffraction, gas sorption analysis and surface acidity measurement by pyridine adsorption-FTIR measurement techniques. Result showed that pillaring process to saponite produced pillared saponite with increasing specific surface area, pore volume as well as surface acidity that contributed to enhance catalytic activity in menthol esterification. Reusability test was also showed that Zr-PILS activity is relatively sta
    Advanced Materials Research 03/2015; 1101(2015):172-275. DOI:10.4028/
  • Advanced Materials Research 03/2015; 1087.
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    ABSTRACT: Magnetic nanoparticles of cobalt- and nickel-iron oxide have been extensive interest due to their superparamagnetic properties and their potential applications in many fields. Iron, cobalt and nickel can stay in many oxidation states and are easily oxidized especially in ambient air therefore the composition and oxidation states of these oxides can be unintentionally modified. Usually, the composition and oxidation states in these magnetic nanoparticles are determined by various experimental techniques required a sample in solid phase. This may lead the nanoparticles to directly contact with air and change the state. In this study, the magnetic nanoparticles in colloidal phase with concentration of 24mg/ml, derived from co-precipitation process, were directly injected to a liquid cell for X-ray absorption near-edge structure (XANES) measurement. The iron-, cobalt- or nickel-iron oxide nanoparticles were prepared by dissolving CoCl2/FeCl3or NiCl2/FeCl3, respectively, in deionized water with various atomic ratios. The average iron oxide nanoparticle size is about 4.2 nm with polydispersity of 0.987 which was obtained by dynamic light scattering. Spherical shape with some stabilizer layer was observed by transmission electron microscope. The iron content in various composition nanoparticles was estimated in liquid phase by the ratio between the Fe edge peak and Co or Ni edge peak. The oxidation states of metal ions were also derived from the linear fitting of standard compounds at particular oxidation states. The shifts of peak positions were examined to indicate the variation of oxidation state as well.
    Advanced Materials Research 02/2015; 1103(2015):21-27.