Khairel Rafezi Ahmad, Associate Prof Dr.: Recent submissions
Now showing items 21-39 of 39
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Fire resistance of biomass ash panels used for internal partitions in buildings
(Elsevier B.V., 2013)This study was to develop fire-resistant panels with a high biomass ash ratio from the combustion of EFB at an industrial scale to be used in different fire-resistant internal partitions in buildings and industrial ... -
Effect of roughness of hypo-and hyper-eutectic Al-Si piston alloy on wear characteristics under lubrication
(Elsevier B.V., 2013)The tribological behavior of tow Al-Si alloys under the influence of surface roughness average was investigated for the present study. The silicon content of these alloys ranged 10 and 16-wt% Si, and includes hypoeutectic ... -
Sintering behavior and microstructure evolution of mechanically alloyed W–bronze composite powders by two-step ball milling process
(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 ... -
Intermetallic compound formation on solder alloy/cu-substrate interface using lead-free sn-0.7cu/recycled-aluminum composite solder
(Scientific.Net, 2012-12)Feasibility of using recycled-Aluminum (re-Al) as reinforcement particulates in Sn-0.7Cu is assessed by powder technology method, whereby re-Al particulates are produced from discarded aluminum beverage cans. This paper ... -
Fire resistance of biomass ash panels used for internal partitions in buildings
(Malaysian Technical Universities Network (MTUN), 2012-11-20)constructions. This study develop new products made of by biomass ash from industry waste for the internal partitions panel. Modifying the internal partition panel of wall with addition of biomass ash (EFB) and clay soils ... -
Effect of roughness of hypo-and hyper-eutectic Al-Si piston alloy on wear characteristics under lubrication
(Malaysian Technical Universities Network (MTUN), 2012-11-20)The tribological behavior of tow AlSi alloys under the influence of surface roughness average was investigated for the present study. The silicon content of these alloys ranged 10 and 16-wt% Si, and includes hypoeutectic ... -
The sensing mechanism and detection of low concentration acetone using chitosan-based sensors
(Elsevier B. V., 2013)This paper aims to discuss the usage of chitosan film sensors to detect acetone concentrations in human breath, in order to precisely diagnose diabetes mellitus in patients. Acetone concentration in the breath varies from ... -
Dry sliding wear behaviour of A390 hypereutectic (Al–Si) alloy
(Universiti Malaysia Perlis (UniMAP)Pusat Pengajian Kejuruteraan Mekatronik, 2012-02-27)The behavior of wear for dry alloy A390 of (aluminum–silicon) casting which constitutes 16% Si is investigated. The lost of the wear rate is weighted and the volume decreases with increasing speed of sliding as well as ... -
Wettability, electrical and mechanical properties of 99.3Sn-0.7Cu/Si 3N4 novel lead-free nanocomposite solder
(Trans Tech Publications, 2011-07-04)A nanocomposite solder alloy with 99.3Sn-0.7Cu base alloy was successfully fabricated using the powder metallurgy route which consists of blending, compaction and sintering. Varying amount of nano size silicon nitride ... -
The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
(University of Malaya, 2009)In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the ... -
Chitosan pH Sensor
(Universiti Malaysia Perlis, 2010-01-07)Chitosan is a natural biomaterial derived from the alkaline deacetylation of chitin that is present in many crustaceans, insects and mollusk shells. -
Novel of Binary Metal-Non Metal Material for Chair Flower Product (Novel AI - PP for Chair Flower Product)
(Universiti Malaysia Perlis, 2009)Material for aluminium product usually made from aliminium scrap. Nowadays, the price of aluminium scrap is increased. The idea is how to minimize the cost of production via minimize the weight of the product without ... -
The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
(Universiti Malaya, 2009)In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the ... -
Effect of age hardening on Aluminum alloys: a study of motorcycle piston
(Universiti Malaysia Perlis, 2009-12-01)This paper reported on the effect of age hardening on the aluminum alloys piston. These studies were carried out to improve the hardness of the aluminum alloys piston by using age hardening method. The AlSiCuMg alloys with ... -
The effects of solutionizing temperatures on microstructures of as-received A357 alloy
(Universiti malaysia Perlis, 2009-12-01)Solution treatment has been carried out on as-received A357 alloy at two solution treatment temperatures of 530ºC and 550ºC for 11 hours. The microstructural study was performed by using optical microscope. Optical ... -
Comparative study of corrosion behavior of AA2014/15 Vol%Al2O3p and AA2009/20 Vol% SiCw
(Portuguese Electrochemical Society, 2008)The influence of heat treatment on the corrosion behavior of two aluminium matrix composites (AA2014/15 vol% Al2O3p - composite A and AA2009/20 vol% SiCw - composite B) was analyzed in 3.5% sodium chloride solution. The ... -
The application of Fluidity Spiral in sand-mold casting
(Universiti Kebangsaan Malaysia (UKM), 2008-12-03)The term fluidity is always used in the cast-metals industry. Fluidity is the reciprocal of viscosity. The foundryman job is to search the amount of quantity that will permit him to evaluate the relative ability of a given ... -
The influence of welding parameters and corrosive environment on the joint strengh of resistance Spotwelded Mild Steel Sheets
(Universiti Kebangsaan Malaysia (UKM), 2008-12-03)In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the ... -
Effect of Inhibitors on the Corrosion of AISI-1018 Steel in Sea-Water Environment
(Research India Publications, 2008)The inhibitive properties of sodium benzoate for AISI-1018 steel controlling corrosion were studied in seawater environment at atmospheric condition. Three sets of solution were prepared with the concentrations of 0.3M, ...