Browsing Khairel Rafezi Ahmad, Associate Prof Dr. by Author "azmirahmat@unimap.edu.my"
Now showing items 1-9 of 9
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Development of dense hydroxyapatite-ni by modified electroless deposition technique.
Sri Asliza, Md Amin; Mohd Zaheruddin, Kasmuin; Azmi, Rahmat, Dr.; Shamsul Baharin, Jamaludin, Prof. Dr.; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2014)Ni deposited on HA powder was prepared by electroless plating process without sensitization and activation treatment. The deposited powder obtained was characterized by energy dispersive spectroscopy (EDX) and x-ray ... -
Effect of different nickel content on the mechanical properties of hydroxyapatite-ni composites from coated powders
Sri Asliza, Md Amin; Mohd Zaheruddin, Kasmuin; Azmi, Rahmat, Dr.; Shamsul Baharin, Jamaludin, Prof. Dr.; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2014)HA-Ni composites were fabricated by uniaxial pressing from coated powders, in which HA particles were successfully coated with nickel precursor by the electroless deposition method. The compacted powders sintered at ... -
Electrochemical measurement of PBS using cyclic voltammetry and AAO fabricated at ambient temperature and low potential
Alaba Oladeji, Araoyinbo; Mohd Nazree, Derman, Dr.; Azmi, Rahmat, Prof.; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2013)Anodic aluminium oxide fabricated at ambient temperature and low potential in phosphoric acid electrolyte was used as the working electrode for the electrochemical measurement of phosphate buffer saline under different pH ... -
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 ... -
Preparation and characterization of Co-HA powder using modified electroless method
Mohd Zaheruddin, Kasmuin; Sri Asliza, Md Amin; Azmi, Rahmat, Prof. Madya Dr.; Shamsul Baharin, Jamaludin, Prof. Dr.; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2014)C0-HA composite produced by simple electroless deposition method was studied. From the particle size analysis by Malvern particles analyzer its shows that 19% increment in average of the particle size powder increase after ... -
The role of direct chilling, retrogression and reaging treatment on mechanical properties of high strength aluminum alloy
Naeem, Haider T.; Kahtan Sadiq, Muhammed, Dr; Khairel Rafezi, Ahmad, Dr.; Azmi, Rahmat, Prof. (Trans Tech Publications, 2013-03)The effect of retrogression and reaging heat treatment on microstructure evolution andmechanical properties of 7075 Al alloy in direct chilling casting process was investigated. The subsequent heat treatment process comprised ... -
Room temperature anodization of aluminum and the effect of the electrochemical cell in the formation of porous alumina films from acid and alkaline electrolytes
Alaba Oladeji, Araoyinbo; Azmi, Rahmat, Assoc. Prof. Dr.; Mohd Nazree, Derman, Dr.; Khairel Rafezi, Ahmad, Dr (VBRI Press, 2012)Nanoporous alumina was produced by anodic oxidation of aluminum in both acidic and alkaline electrolytes. Previous reports indicate that nanoporous aluminais mainly produced from strongly acidic electrolytes, and with the ... -
Sintering effects on mechanical properties of Co-HA composite prepared by modified electroless deposition.
Mohd Zaheruddin, Kasmuin; Sri Asliza, Md Amin; Azmi, Rahmat, Dr.; Shamsul Baharin, Jamaludin, Prof. Dr.; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2014)Co-HA composite produced using electroless deposition without conventional sensitization and activation treatment was studied with varying sintering temperature (1100°C, 1200°C and 1250°C). The particles size, bulk density, ... -
Using gibbs standard state free energy and a power regulating device to predict and control the fabrication of nanoporous alumina
Alaba Oladeji, Araoyinbo; Azmi, Rahmat, Prof.; Mohd Nazree, Derman, Dr.; Khairel Rafezi, Ahmad, Dr. (VBRI press, 2013-12)The basic concept of Gibbs standard state free energy predicts a favorable condition for both room and high temperature fabrication of nanoporous alumina in phosphoric acid electrolyte. The anodization of aluminum foil in ...