Browsing School of Materials Engineering (Articles) by Author "Azmi, Rahmat, Prof."
Now showing items 1-14 of 14
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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 ... -
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 ... -
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 ... -
Evolution of the retrogression and reaging treatment on microstructure and properties of Aluminum Alloy (Al-Zn-Mg-Cu)
Naeem, Haider T.; Khairel Rafezi, Ahmad, Dr.; Kahtan Sadiq, Muhammed, Dr; Azmi, Rahmat, Prof. (Trans Tech Publications Inc., 2014-04)In this study the evolution of the retrogression and reaging (RRA) heat treatment process on microstructure and mechanical properties of AA 7075 Al-alloys which produced by semi-direct chill (DC) casting process were ... -
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 ... -
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 ... -
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 ... -
Self-compacting high density tungsten-bronze composites
Kahtan S, Muhammed, Dr.; Azmi, Rahmat, Prof.; Azizan, Aziz, Assoc. Prof. Dr. (Elsevier, 2013-07)Green compacts of W–bronze were encapsulated in shells of bronze powder, placed in a ceramic mold and sintered in alumina tube furnace at 1150 °C. Throughout the sintering cooling stage the differential coefficient of ... -
Sintering behavior and microstructure evolution of mechanically alloyed W–bronze composite powders by two-step ball milling process
Kahtan S., Muhammed, Dr.; Azmi, Rahmat, Prof.; Khairel Rafezi, Ahmad, Dr. (Elsevier, 2013-01)The miscibility of W in Sn and Cu is extremely poor. Sintering of W–bronze composites to their full density is proved to be difficult. To tackle this problem, the ball milling process of the W–bronze powder mixture proposed ... -
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 ...