Noraziana Parimin
Thumbnail Image
Preferred name
Noraziana Parimin
Official Name
Noraziana, Parimin
Alternative Name
Parimin, N.
Noraziana, Parimin
Main Affiliation
Scopus Author ID
55955288500
Researcher ID
GCS-3360-2022

Research Output

Filters

2 1
2
2
Reset filters

Settings
Now showing 1 - 2 of 2
  • Publication
    Characterization of oxidation kinetics and oxide scale formation on isothermal oxidation of HR-120 ni-based superalloy at 500ºC
    ( 2024-12)
    Noraziana Parimin
    ;
    Esah Hamzah
    ;
    Astuty Amrin
    The HR-120 Ni-based superalloy underwent isothermal oxidation at 500°C in order to better understand the oxidation kinetics and the production of oxide scales. To create small and large grain structure, the HR-120 Ni-based superalloy was heat-treated at two distinct temperatures, 950ºC and 1100ºC. A 500°C for 500 h isothermal oxidation test was performed on the heat-treated alloy of the study examined the oxidation kinetics, oxide phase development and oxide surface morphology of alloy that had undergone isothermal xidation. Plotting weight gain versus surface area allowed for the measurement of oxidation kinetics. The XRD method was used to examine the oxide phase. Surface morphology was investigated with SEM and EDX methods. A parabolic rate law was observed in the oxidation of both heat-treated alloys, suggesting a diffusion-controlled oxide growth mechanism. The alloy’s surface has developed many oxide phases as a result of exposures lasting 500 h. The oxidized samples’ surface morphology after 300 hours shows that overly large Nb-rich oxides are dispersed throughout the continuous oxide scale development. On coarse-grained heat-treated alloys, Nb-rich oxides produced that were abnormally big. This occurrence will initiate a crack that spreads around the oxide.
      21  2
  • Publication
    Oxide growth behaviour of 800H and HR-120 series ni-based alloys on isothermal oxidation
    ( 2024-03)
    Nurul Athirah Zainal @ Zaiton
    ;
    Noraziana Parimin
    ;
    Aqmar Ikhmal Anuar
    ;
    Nur Farhana Hayazi
    ;
    Farah Farhana Zainal
    The isothermal oxidation of two types of Ni-based alloy, alloys 800H and HR-120 was investigated in this study. The alloy underwent an isothermal oxidation test at 950 ºC for 150 hours of exposure. Oxdised alloys were tested using oxidation kinetics methods, phase analysis using X-ray diffraction (XRD) and oxide morphology using scanning electron microscopy (SEM) techniques. Oxidation kinetics were determined based on the weight change per surface area of the oxidised alloy over a 30-hour interval. As a result, both alloys displayed a pattern of weight gain as the exposure period increased. Both alloys have followed a parabolic rate law, indicating a controlled kinetics of oxide scale diffusion. XRD analysis showed that the main Cr-containing oxide has formed on the surface of the alloy with the addition of Ti oxide for the 800H alloy and Nb oxide for the HR-120 alloy due to the different alloying element content of the two alloys. Oxide surface morphology records the uniform oxide scale that forms on the surface of the alloy.
      17  2