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Indonesian Applied Physics Letters
Published by Universitas Airlangga
ISSN : -     EISSN : 27453502     DOI : http://dx.doi.org/10.20473/iapl.v1i2.23444
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
Indonesian Applied Physics Letter is an multi-disciplinary international journal which publishes high quality scientific and engineering papers on all aspects of research in the area of applied physics and wide practical application of achieved results. The field of IAPL, which can be described as encounter of material science, theoretical science, computational, instrumentation, biomedical, geophysics and applied physics, has become distinguishable integrated discipline of research-based endeavor.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 1 No. 2 (2020): Desember" : 5 Documents clear
The Effect of Various Milling Time Duration On The Characteristic of Glass Ionomer Cement (GIC) with The Addition of Liquid Pmve-Ma Djony Izak Rudyardjo; Jan Ady; Aditya Budi Fauzi
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23445

Abstract

A study entitled The Effect of Milling Time Duration on the Characteristics of Glass Ionomer Cement (GIC) Dental Cement with the Addition of Liquid PMVE-MA aims to determine the effect of milling time duration on the physical and mechanical properties of Glass Ionomer Cement, and to determine the optimum milling time duration in order to obtain GIC dental cement with the best characteristic to be applied as a dental restoration material. The duration of the milling time was 80 minutes, 90 minutes, 100 minutes, and 110 minutes. After the milling process, the next process was sintered at a temperature of 1200 for 1 hour to form Powder Glass Ionomer. Then Powder Glass Ionomer was added with Poly Methyl Vinyl Ether-Maleic Acid (PMVE-MA) to form a paste. The mixed paste was then formed. Sample characterization was the density test, the compressive strength test, and the vickers hardness test. The results of the density test obtained the highest value of 1.683 gram / cm3, the compressive strength test of 71.841 MPa, and the highest value of the hardness test of 92.3 Kg / mm2. These results increased as the increasing milling time duration up to 110 minutes.
DIAMOND LIKE CARBON (DLC) COATING ON CARBON STEEL WITH PLASMA TECHNIQUES FOR GAS PIPES Ilham Nur Dimas Yahya; Djony Izak Rudyardj; Jan Ady
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23446

Abstract

A study about coating on carbon steel by plasma technique aims to determine the variation of time and pressure on the hardness and corrosion strength of a material. The material used in this research was carbon steel with carbon chest of 0.245%. This carbon steel was a plasma technique process with a temperature of 300oC and various pressure variations, such as 1.2 mbar; 1.4 mbar; 1.6 mbar; 1.8 mbar; And 2.0 mbar. The highest hardness was found at 1.8 mbar pressure, which was 161.7 VHN. Then set with a temperature of 300oC and a pressure of 1.8 mbar and a time variation, which were 1 hour; 1.5 hours; 2 hours; 2.5 hours; 3 hours. The largest hardness value was obtained at 3 hours with a hardness value of 161.7 VHN. Then the corrosion test obtained the optimum value at 2 hours with a corrosion value of 0.69 mpy. This was because on the surface of carbon steel there was a layer of Diamond Like Carbon (DLC).
3D Printing Geometric Scaffold Design Variation of Injectable Bone Substitutes (IBS) Pa Dyah Hikmawati; Sarda Nugraheni; Aminatun Aminatun
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23447

Abstract

3D printing technology application in tissue engineering could be provided by designing geometrical scaffold architecture which also functionates as drug delivery. For drug delivery scaffold on bone tuberculosis, the cell pore of the geometric design was filled with Injectable Bone Substitutes (IBS) which had streptomycin as anti-tuberculosis. In this study, scaffolds were synthesized in three cells geometric filled by Injectable Bone Substitutes (IBS), Hexahedron, Truccated Hexahedron, and Rhombicuboctahedron, which had 2.5 mm x 2.5 mm x 2.5 mm size dimension and 0.8 mm strut. The final design was printed in 3D with polylactic acid (PLA) filament using the FDM process (Fused Deposition Modelling). The composition of IBS paste was a mixture of hydroxyapatite (HA) and gelatine (GEL) 20% w/v with a ratio of 60:40, streptomycin 10 wt% and hydroxypropyl methylcellulose (HPMC) 4% w/v. It was then characterized using Fourier-transform infrared spectroscopy (FTIR). Scaffold–paste characterization was included pore size test of 3D printing result before and after injected using Scanning Electron Microscope SEM, porosity test, and compressive strength test. The result showed that the pore of scaffold design was 1379 µm and after injected with IBS paste, the pore leaving 231.04 µm of size. The scaffold with IBS paste porosity test showed ranges between 40,78-70,04% while the compressive strength of before and after injected ranges between 1,110-634 MPa and 2,217-6,971 MPa respectively. From the test results, the scaffold 3D printing with IBS paste in this study had suitable physical characteristics to be applicated on cancellous bones which were infected by tuberculosis.
MECHANICAL CHARACTERISTIC STUDY OF COBALT ALLOY PREPARED BY POWDER METALLURGY METHOD Aminatun Aminatun; Jan Ady; Mega Farynda KD
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23448

Abstract

This study was conducted to determine the effect of compaction pressure and sintering temperature variations on the properties of physical, mechanical, and micro cobalt alloy. Manufacture of the cobalt alloy with compositions 63,75%, chromium 30%, molybdenum 5%, manganese 0,5%, silicon 0,5%, and 0,25% nitrogen using powder metallurgy method. Variations of compaction pressure were 339,70 MPa, 396,31 MPa, dan 452,93 MPa, and sintered at temperature 12000C and 130 0C for 2 hours of holding time. Density was increased along with the increasing compaction pressure and sintering temperature (3,9-6,6 g/cm). The hardness was also increased along with the increasing compaction pressure and sintering temperature  205,1-316,2 VHN. XRD results showed that γ phase with fcc structure was formed at the temperature of 12000C and 13000C for all variations of pressure. SEM-EDX results showed that the oxygen content decreased along with increasing compaction pressure and sintering temperature. Based on ASTM F75 hardness standard, the sample with compaction pressure 452,93 MPa and sintered at 13000C was the best cobalt alloy with a hardness value of 316.2 VHN.
Degradation and Corrosion of Biodegradable Metal Zn-xCa Adri Supardi; Miftachul Nur Afifah; Djony Izak Rudyardjo
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23444

Abstract

Zn-based biodegradable metals (BMs) are considered as new potential in osteosynthetic implant devices. In this study Ca, which acts as an essential element in the human body, is used to improve the rate of Zn degradation and corrosion. The alloy was synthesized using the powder metallurgy method with two different processes: cold pressing followed by sintering (CP-S) and hot isostatic pressing (HIP). Microstructure properties, as well as in vitro degradation and corrosion were studied to determine the effect of adding Ca. Variations in the sample consist of Zn-0.5Ca, Zn-1Ca, Zn-1.5Ca and Zn-2Ca. The results and analysis of test data show that the addition of Ca increases the rate of corrosion and degradation of the materials. Better bonding and microstructure properties are obtained in Zn-2Ca samples which form CaZn13 phases and small porosity. As for the HIP process, a better microstructure is obtained compared to CP-S.

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