Prefacedoi: 10.1088/1757-899X/553/1/011001pmid: N/A
The 19th International Union of Materials Research Societies – International Conference in Asia (IUMRS-ICA) 2018 was held in Bali on 30 October – 2 November 2018. The main theme of IUMRS-ICA 2018 is “Innovation of Advanced Material for Green Technology and Sustainable Development”. The conference is organized by Materials Research Society-Indonesia (MRS-INA) with the aim to provide international forum for presenting scientific results in the field of materials science by scientists, academicians, industries and government from national, as well as regional and international.The pupose of the IUMRS-ICA 2018 is to gather Indonesian Materials Researchers, and to promote international collaboration and cooperation among scientists and academia from regional and developed countries. This should be accomplished by presence of invited world-class speakers for the scientific program. In this event, the fundamentals, innovations and industrial applications of Materials Sciences and Technology will be discussed.The Committee received over 200 scientific articles showing a diverse and stimulating program, from more than 40 national and international institutions, covering 20 countries (UK, Turkey, Taiwan, Czechia, Pakistan, India, Austria, Germany, Ethiopia, Egypt, USA, Malaysia, Singapore, Thailand, Japan, Bangladesh, China, Australia, Korea and Indonesia). The publication committees were responsible for arranging approximately 150 full peer review of the manuscripts that will appear in several media of international publications, such as Progress in Natural Science: Materials International, IONICS, Journal of Atom Indonesia, Indonesian Journal of Materials Sciences as well as the IOP Conference Proceedings. After selection and peer review, there are 66 articles to be published in IOP Materials and Engineering.List of Steering Committee, International Advisory Board, Indonesian Advisory Board, Organizing Committee, Chairman, Members, Language Editor and Layout Editor are available in this pdf.
Peer review statementdoi: 10.1088/1757-899X/553/1/011002pmid: N/A
All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
Magnetic and Electromagnetic Wave Absorption Characteristics of BaFe11Ti0.5Zn0.5O19 in X BandDedi, ; Idayanti, Novrita; Kristiantoro, Tony; Sudrajat, Nanang; Gustinova, Arighi; Primadona, Indah
doi: 10.1088/1757-899X/553/1/012001pmid: N/A
Research has been made on BaFe11Ti0.5Zn0.5O19 compound by high energy milling (HEM) with variation of milling t = 2, 8, and 12 hours. This research was conducted to find out the influence of milling time on magnetic and electromagnetic wave absorption properties of BaFe11Ti0.5Zn0.5O19 compound. Materials were characterized by X-Ray Diffraction (XRD), Permagraph C, Scanning Electron Microscope (SEM), and Vector Network Analyzer (VNA). XRD patterns of bulk sample had shown the material forms a single phase BaFe12O19 (Barium hexaferrite). A SEM image of bulk sample shows hexagonal structure. A VNA spectrum obtained from 12 hours milling exhibit the highest electromagnetic wave absorption compared with 2 and 8 hours milling, with 99,19% absorption at frequency 11,7 GHz in X-band. Agglomeration occurs on the sample powder may due to electrostatic force among particles and a SEM image confirmed it. Based on that results, the addition of milling time can improve the electromagnetic wave absorption of BaFe11Ti0,5Zn0,5O19 powder.
Selected Application of Linear Composites Containing Side Emitting Optical FibresKřemenáková, Dana; Militký, Jiří; Mishra, Rajesh; Venkataraman, Mohanapriya; Petru, Michal
doi: 10.1088/1757-899X/553/1/012002pmid: N/A
The main aim of this contribution is description of side emitting plastic optical fibres basic properties and their efficient embedding into fibrous structures for creation of textile structures with active visibility in shadows. For preparation of textile structures containing side emitting plastic optical fibres the special weaving technology is used. Illumination system with light emitting diode (LED) is used as light source. Light intensity of textile structures is compared with light intensity of fibres. Incorporation of side emitting plastic optical fibres into fibrous tube provides sufficient side emission especially for plastic optical fibres with larger diameters. The corresponding technology has been developed and the possible applications were proved in real conditions. The use of side emitting POF in textile tube are still in the first stage of industrial realization and it will be necessary to optimize their composition and functionality for various targeted applications including surface effects, doping and use of special dyestuffs.
3D-Modelling and Casting Simulation for The Fabrication of Megaprostheses Implant by Vacuum Centrifugal CastingSuharno, B.; Supriadi, S.; Sutiyoko, ; Setyawan, D.; Rahmatulloh, W. M. F.; Ramahdita, G.
doi: 10.1088/1757-899X/553/1/012003pmid: N/A
Recently, a high number of bone fracture incidents per year urges researchers in developing megaprostheses as artificial body parts. However, the complicated design and requirements for this custom-made prostheses are the key challenge. In accordance, this study focused on the preparation steps of 3D-modelling and casting simulation for the fabrication of megaprostheses implant by vacuum centrifugal casting. The reconstruction steps of 3D-modelling were started by observing the medical image data (i.e. CT-scan images). As the 3D-modelwas ready, the gating system was designed by placing two mandible bone models as the casting part with sprue and ingates where the design was respected to the gating system design for centrifugal casting. Moreover, the variation of casting part position,numbers, shapes and dimensions of the ingate, as well as the total surface area of ingates (Si) was applied while creating the gating system designsfor casting simulation. Chemically Pure Titanium (CP-Ti) with the pouring temperature and time of 1700°C and 4s, respectively, were used as the parameters for casting simulation. The solidification test results showed that the shrinkage cavities tended to decrease in volumetric scale with increasing the total surface area of the ingates, while the casting part position, number, shape, and dimension of ingate showed the difference in effectivity of the solidification of molten metal on the shrinkage cavities formation.
The Study of the Effect of Final Tin Slag as Partial Substitution in Portland based Concrete towards Corrosion Resistance of Reinforcement Steel against Chloride Environment with Linear Polarization MethodAryani, Irma T.; Riastuti, Rini; Ibnu, Muhammad; Shidqi, Afif
doi: 10.1088/1757-899X/553/1/012004pmid: N/A
The final tin slag is the final product of the tin smelting process which contains oxide compounds such as SiO2, CaO, Al2O3, and Fe2O3 which have similarities to the content of the oxide compounds found in Portland cement (OPC). The existence of the final tin slag has not been widely used. For that reason, the final tin slag will be very useful if it is used as a cement substitute as a raw material for making concrete. This study aims to analyze the resistance of cement and steel reinforcement mixtures on concrete to a corrosive environment using linear polarization method. In this study, the composition of the final tin slag used was 10%, 20%, 30%, and 40%. The final tin slag used came from PT. Timah Tbk on Bangka Island Indonesia. Then, the 0.5 w/c ratio concrete will be cured for 28 days and will be immersed with a 3.5% NaCl solution for 6 days. The results presented that the reinforcement steel embedded in concrete OPC60-FTS40 was the sufferest towards corrosion since it had the highest corrosion rate in each immersion day among all the concrete samples and followed by OPC80-FTS20, OPC70-FTS30, OPC100, and OPC90-FTS10 in six days of immersion.
The Effect of Zn in as-Cast Mg-Zn Alloys for Biodegradable MaterialsSetiawan, Asep Ridwan; Putera Satria, Al Azhary; Basuki, Arif; Wibowo, Untung Ari
doi: 10.1088/1757-899X/553/1/012005pmid: N/A
This research presents the analysis of microstructure, mechanical, and corrosion behavior of three Mg-Zn binary alloys, Mg-1Zn, Mg-3Zn, and Mg-5Zn. The result of metallography for as-Cast Mg-Zn alloys with different Zn content shows that the presence of Zn will cause grain refinement effect to the microstructure of Mg-Zn alloys and allows the formation of γ phase of Mg-Zn precipitation along the grain boundaries. The addition of Zn also significantly increases the mechanical properties of magnesium alloys corresponding to fine grain strengthening and second phase strengthening effect. Immersion test in Ringer’s solution show that the addition of Zn in magnesium alloys reduce its corrosion rate by improving magnesium alloys corrosion potential.
The Influence of Yttrium Addition on The Corrosion Resistance and Tensile Strength of as-Cast Mg-Y AlloysSetiawan, Asep Ridwan; Ardiyana, Herdi; Basuki, Arif; Wibowo, Untung Ari
doi: 10.1088/1757-899X/553/1/012006pmid: N/A
This study shows the effect of Yttrium addition (2-6 wt%) on the mechanical properties and the corrosion resistance of Mg-Y binary fabricated from sacrificial magnesium anode. The beneficial of Mg anode source was tremendous for magnesium alloy especially for corrosion resistance. Improvement of mechanical properties due to the addition of Yttrium was caused by grain refinement solid solution strengthening. Tensile strength increased with the addition of Yttrium. Mg-Y binary is immersed in the SBF solution to see the corrosion resistance. The hydrogen evolution was increased from 0,32 mL/cm2 day, 1 mL/cm2 day, and 34,42 mL/cm2 day for Mg-2%wt Y, Mg-4%wt Y, and Mg-6%wt Y respectively.
The Study of the Effect of Slag Ferronickel Substitution (FNS) in Portland Concrete on Corrosion Resistance of Reinforced Steel in Chloride Environment with Cyclic Polarization MethodIbnu, M; Riastuti, Rini; Ashari, A S; Aryani, I T
doi: 10.1088/1757-899X/553/1/012007pmid: N/A
Ferronickel slag is a by-product of the ferronickel extraction process. Smelting process that contain the oxide compounds such as SiO2, CaO, Al2O3, and Fe2O3. The compound content is similar to the content of Portland brand commercial cement (OPC) which is commonly used as raw material for making concrete. Therefore, this research will analyze the effect of using ferronickel slag as a cement mixture on the resistance of reinforced steel in concrete. The author will analyze the corrosion behavior of various mixtures of OPC cement and ferronickel slag with variations in the use of Ferronickel slag as much as 5%, 10%, 15%, 20% with OPC cement in the process of curing concrete for 28 days then it is immersed 3.5% NaCl solution. The concrete wiil uses cyclic polarization method to analyze pitting behaviour and resistance corrosion of reinforced steel in chloride environment. The results show that the steel in the 20% slag concrete mixture added with OPC cement has resistance compared to other mixed variations.
Effects of Poling on Electrical Properties of Flexible Piezoelectric Composites with Natural Rubber MatrixPromsawat, Methee; Boonsri, Kan-ubon; Samadoloh, Sukanya; Promsawat, Napatporn; Kalkornsurapranee, Ekwipoo
doi: 10.1088/1757-899X/553/1/012008pmid: N/A
This work was done to study effects of electrical applied voltage on electrical properties of flexible piezoelectric composites with natural rubber (NR) matrices. Different amounts of lead magnesium niobate titanate (PMNT) as a piezoelectric phase were added into NR matrices. NR/xPMNT (where x = 0, 60, 80, 100, 120 and 150 phr) composites were consequently obtained. The composites were poled under 25 kV/cm electric field for 30 mins. For all the samples, tetragonality is enhanced after poling. Dielectric and ferroelectric properties, and generated electrical voltage of unpoled and poled samples were measured. For the samples with x ≤ 80 phr, the properties are not improved with the poling process. However, for x > 80 phr samples, the properties are significantly enhanced after poling. A percent increase in generated electrical voltage after poling tends to increase with increasing PMNT concentration. The overall result suggests that the NR/100PMNT composite is suitable for applications as high mechanical damage resistance piezoelectric sensors and generators.