Browsing School of Materials Engineering (Articles) by Author "azmirahmat@unimap.edu.my"
Now showing items 1-18 of 18
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A brief review of layered rock salt cathode materials for lithium ion batteries
Tan, Tze Qing; Soo, Soon Peng; Azmi, Rahmat, Prof.; Shamsul Baharin, Jamaludin, Prof. Dr.; Rozana Aina, Maulat Osman, Dr. ; Zul Azhar, Zahid Jamal, Dato Prof. Dr.; Mohd Sobri, Idris, Dr. (Trans Tech Publications, 2013)Nowadays, many researchers have been studying on the layered rock salt-type structure as cathode materials for the lithium ion batteries. LiCoO2 is the most commonly used cathode material but Co is costly and toxic. Thus, ... -
Comparison of liquid phase sintering and Cu-melt infiltration methods to consolidate 80W-Cu composite using nickel as sintering activator
Hafed, Ibrahim; Azizan, Aziz, Assoc. Prof. Dr.; Azmi, Rahmat, Prof.; Kahtan Sadiq, Muhammed, Dr. (Trans Tech Publications, 2013)In this article, studies were conducted to evaluate the densification of W- Cu sintered compacts produced using two methods; liquid phase sintering (LPS) and combination of liquid phase sintering and liquid infiltration ... -
Corrosion performance of reinforcement bar in geopolymer concrete compare with its performance in ordinary portland cement concrete: A short review
Farah Farhana, Zainal; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Azmi, Rahmat, Prof.; Mohd Mustafa Al-Bakri, Abdullah; Norainiza, Saud (Trans Tech Publications, 2013)Since decades ago, corrosion is the crucial factors for million dollars loss in construction industry. Corrosion of reinforcement bar in ordinary Portland cement (OPC) concrete is mainly due to chloride and acid attack and ... -
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 ... -
The effect of iron fillings waste contents on the attenuation level of anti-radiation shielding concrete
Ali Basheer, Azeez; Kahtan Sadiq, Muhammed, Dr.; Mohd Mustafa Al-Bakri, Abdullah; Azmi, Rahmat, Prof. (Trans Tech Publications, 2013)Shielding concretes of different iron filling contents were assessed for their anti radiation attenuation properties. The measurements have been performed by using gamma spectrometer of NaI (Tl) detector, the sources were ... -
The effect of pH on zinc phosphate coating morphology and its corrosion resistance on mild steel
Khalid, Abdalla; Azmi, Rahmat, Prof. Madya Dr; Azizan, Aziz, Assoc. Prof. Dr. (Trans Tech Publications, 2013)Zinc phosphate coating is commonly used for corrosion protection of metallic materials, mainly mild steel. In this study, influence of the pH of phosphating bath on the surface morphology and corrosion resistance of zinc ... -
Effects of cobalt addition and temperature on microstructure and density of w-25Cu composites prepared via liquid infiltration
Hafed, Ibrahim; Azizan, Aziz; Azmi, Rahmat (Trans Tech Publications, 2012-12)In this study, the effect of Co and sintering temperature on microstructure of W-25Cu composites prepared via copper melt infiltration has been investigated. The concentration of Co addition used ranged from 0.5 to 3wt. ... -
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 ... -
The factors affecting the swelling of W–bronze composite system at different sintering conditions
Kahtan S, Muhammed, Dr.; Azmi, Rahmat, Prof. (Scientific.Net, 2012-12)During sintering of Wbronze metal matrix composites, the difference in the interdiffusuion path, sintering atmosphere and alloying element might be the source of the swelling phenomenon. In this study, the factors lead to ... -
The influence of deposition temperature on the morphology and corrosion resistance of zinc phosphate coating on mild steel
Khalid, Abdalla; Azmi, Rahmat, Prof. Madya Dr.; Azizan, Aziz, Assoc. Prof. Dr. (Trans Tech Publications, 2013)The influence of phosphating temperature on the surface morphology and corrosion resistance of zinc phosphate coatings on mild steel was investigated. The phosphate layers were deposited on steel from phosphating bath at ... -
Microstructure and interface analysis of glass particulate reinforced aluminum matrix composite
Shamsul Baharin, Jamaludin, Prof. Dr.; Hadipramana, Josef; Mohd Fitri, Mohamad Wahid; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Azmi, Rahmat, Prof. (Trans Tech Publications (TTP), 2013)A characterization of microstructure and interface was made on the composites Al- 4% Cu reinforced with 15 wt. % glass particulate. The composite was fabricated by powder metallurgy followed by solution treatment and ... -
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 the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
Kahtan S, Muhammed, Dr.; Azmi, Rahmat, Prof. (Elsevier B.V., 2012-11)In this study, the effects of 1-3 wt.% Fe and Co additions on the sintering of W 40-80wt.%-pre-alloy bronze Sn 10 wt.%-Cu compacts were examined. The isothermal part of the sintering process was conducted at temperatures ... -
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, ... -
A study on relationship between porosity and compressive strength for geopolymer paste
Farah Farhana, Zainal; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Azmi, Rahmat, Prof.; Mohd Mustafa Al-Bakri, Abdullah (Trans Tech Publications, 2013-12)This paper presents a study on the relationship between porosity and compressive strength for geopolymer paste. In this research, geopolymer paste was made from fly ash class F based geopolymer mixed with alkaline activator; ... -
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 ...