Mohd Nazree Derman, Assoc. Prof. Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34109
This page provides access to scholarly publication by UniMAP Faculty members and researchers2024-03-28T15:12:53ZAn investigation of TiO2 addition on microstructure evolution of Sn-Cu-Ni solder paste composite
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/69170
An investigation of TiO2 addition on microstructure evolution of Sn-Cu-Ni solder paste composite
Norainiza, Saud; Rita, Mohd Said; Mohd Arif Anuar, Mohd Salleh; Mohd Nazree, Derman; Mohd Izrul Izwan, Ramli; Norhayanti, Mohd Nasir
In this research, varying fraction of titanium oxide (TiO2) reinforcement particles was successfully incorporated into Sn-Cu-Ni solder paste in an effort to study the influence of TiO2 addition on microstructure evolution of Sn-Cu-Ni solder paste composite. Sn-Cu-Ni solder paste composite was produced by mixing TiO2 particle with Sn-Cu-Ni solder paste. The microstructure analysis was carried out by Scanning Electron Microscopy-Energy dispersive X-ray (SEM-EDX). The addition TiO2 particle helps to refine the bulk solder microstructure and suppress the intermetallic compound (IMC) formation at the interface as will be discussed further
Link to publisher's homepage at https://www.matec-conferences.org/
2016-01-01T00:00:00ZHighly response and sensitivity Chitosan-Polyvinyl alcohol based Hexanal sensors
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/69168
Highly response and sensitivity Chitosan-Polyvinyl alcohol based Hexanal sensors
Nur Zuraihan, Abd Wahab; Irwana, Nainggolan; Tulus Ikhsan, Nasution; Mohd Nazree, Derman; Devi, Shantini
This work is to study the sensing properties of chitosanpolyvinyl alcohol film sensors upon hexanal gas exposure using vapour sensing technique. The sensor fabrication process was done using electrochemical deposition method by deposit the sensing materials on the gold patterned electrode with chitosan/PVA. The response value of chitosan-PVA film sensors towards hexanal was taken as an output voltage using electrical testing method. In this study, 1.75% of chitosan with 5% of PVA were mixed with the ratio of (95:5) was tested upon exposure to hexanal gas. The concentration of the hexanal was varied as 10 ppm, 20 ppm, 30 ppm. It was found that the chitosan-PVA film sensors showed fast response, stable, good stability, good recovery, repeatable and good sensitivity towards hexanal exposure. The morphology of the pure chitosan and chitosan-PVA was analyzed by scanning electron microscope (SEM) and the interaction between chitosan and PVA was examined by Fourier Transform Infrared Spectroscopy (FTIR). The FTIR results indicate the changes in characteristics of the spectral peaks due to the formation of the intermolecular bonds between chitosan and PVA. The SEM morphology of the composites showed flat smooth surface that be a sign of uniform distribution of chitosan and PVA mixture throughout the films.
Link to publisher's homepage at https://www.matec-conferences.org/
2016-01-01T00:00:00ZInfluence of Activated Carbon Particles on Intermetallic Compound Growth Mechanism in Sn-Cu-Ni Composite Solder
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/68728
Influence of Activated Carbon Particles on Intermetallic Compound Growth Mechanism in Sn-Cu-Ni Composite Solder
Mohd Izrul Izwan, Ramli; Mohd Arif Anuar, Mohd Salleh; Mohd Nazree, Derman; Rita, Mohd Said; Norainiza, Saud
The influence of Activated Carbon (AC) particles on mechanical properties of Sn-Cu-Ni-xAC solder joint was investigated. Five different Activated Carbon (AC) percentage addition (0 wt. %, 0.25 wt. %, 0.5 wt. %, 0.75 wt. %, and 1.0 wt. %) were prepared via powder metallurgy (PM) technique. Interfacial IMC thickness measurement and shear strength results showed that with thinner IMC layer (by increasing amount of wt.% of AC), the higher the shear strength of the joint. It is believed that the AC particles suppresses the interfacial IMC growth and thus improves the shear strength.
Link to publisher's homepage at https://www.matec-conferences.org/
2016-10-01T00:00:00ZFabrication of calcium phosphate coating on pure magnesium substrate via simple chemical conversion coating: surface properties and corrosion performance evaluations
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/68623
Fabrication of calcium phosphate coating on pure magnesium substrate via simple chemical conversion coating: surface properties and corrosion performance evaluations
Mohd Amin, Farhan Zaludin; Zul Azhar, Zahid Jamal; Mohd Nazree, Derman; Mohd Zaheruddin, Kasmuin
The main objective of the current work was to fabricate calcium phosphate (CaP) coating on 99.9% purity magnesium, Mg substrate through simple chemical conversion method and evaluated the surface properties and corrosion performance of the coated substrates. The chemical conversion method was done by immersing the samples inside primary phosphating bath and followed by secondary treatment in alkaline solutions. The coated samples from the primary (PRI) and secondary (SEC) coating treatment were analyzed from morphological, topographical, and phase analysis aspects. The corrosion behaviour of the coatings inside simulated body fluid was assessed by potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). The PRI and SEC coated were composed of dicalcium phosphate dehydrate (DCPD) and hydroxyapatite (HA), respectively. Both of the coatings improved the corrosion resistance of the Mg substrate. The corrosion potentials, Ecorr of the coated samples becomes nobler compared to the bare substrates. EIS shows that the polarization resistance, Rp is improved about 40 and 2 times fold for PRI and SEC compared to the uncoated samples. Furthermore, PRI shows better corrosion resistance compared to SEC due to lower porosity along with thicker and better coating coverage.
Link to publisher's homepage at https://www.sciencedirect.com/
2018-01-01T00:00:00Z