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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal JMPM (Jurnal Material dan Proses Manufaktur)
Muhammad Budi Nur Rahman
Mechanical Engineering Department, Universitas Muhammadiyah Yogyakarta
Engineering Mechanical Engineering

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Pengaruh Temperatur dan Waktu Etching Terhadap Karakeristik Fisik dan Mekanik Pelapisan Nikel pada Plastik ABS dengan Metode Elektrolessplating Muhammad Budi Nur Rahman; Sunardi Sunardi; Muh Budhi Erlangga; Muh Finza Pratama
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1790

Abstract

ABS Plastic (Acrylonitrile Butadiene Stiren) is one type of plastic that is often used because of the many properties that are beneficial to humans. ABS plastic is widely used in engineering, for example in the electronics and automotive fields. But there are still disadvantages of ABS plastic, including low hardness, no friction resistance, and no heat resistance, so surface treatment is needed. Electrolessplating is a coating process that does not use electricity in the coating process. This study aims to determine the effect of temperature and time variation of nickel electrolessplating etching on roughness, wear, hardness, and thickness. The variation in etching temperature is 30; 40; 50; 60; and 70oC and the etching time is 15, 20, 25, 30 and 35 minutes followed by electrolesplating using nickel for 10 minutes. The tests carried out were surface roughness test, disk on block method wear test, hardness using Shore Durometer tool, and layer thickness using micro photos and scanning electron microscopy (SEM). The results showed that the etching process from electrolyplating affected the specimen surface to be coated with nickel metal. The longer the etching time causes the surface to become coarser from 0.435 μm at 15 minutes to 0.949 μm in 35 minutes. The temperature addition of the etching process will increase the surface surface to a temperature of 50oC at 0.499 μm and then drop. Increasing etching time from 15 minutes to 35 minutes will reduce specific wear, from 1.268 x 10-4 mm2 / kg to 0.465 x 10-4 mm2 / kg. Likewise, the etching temperature from 30oC to 70oC decreases the specific wear from 2.10 x 10-4 mm2 / kg to 0.255 x 10-4 mm2 / kg. The addition of etching and temperature etching time does not significantly increase the hardness value of electrolessplating results. Hardness of raw material is 83.5 shore D after coating the hardness value to 84.7 shore D. The electrolessplating process for 10 minutes produces a layer thickness of 1 μm to 2 μm.
Sifat Tarik, Bending dan Impak Komposit Serat Sabut Kelapa-Polyester dengan Variasi Fraksi Volume Gugun Gundara; Muhammad Budi Nur Rahman
JMPM (Jurnal Material dan Proses Manufaktur) Vol 3, No 1 (2019): Juni
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.3132

Abstract

AbstrakPotensi serat sabut kelapa perlu diteliti untuk dibuat komposit. Tujuan penelitian ini adalah mengetahui pengaruh fraksi volume serat sabut kelapa terhadap sifat tarik, sifat bending dan ketangguhan impak komposit dengan matrik polyester, katalis MEKPO, dan NaOH. Serat sabut kelapa yang digunakan ber diameter 0.2 mm. Komposit dibuat dengan metode cetak tekan pada fraksi volume 20-35%. Pengujian sesuai standar ASTM D638 (uji tarik), ASTM D790 (uji bending) dan ASTM D5941 (uji impak) dengan metode impak izot. Pengamatan foto makro untuk menganalisis kegagalan. Kekuatan tarik dan regangan tarik semakin meningkat dengan peningkatan fraksi volume. Modulus elastisitas tertinggi pada Vf 31,4% sebesar 0,206 GPa dan menjadi 0,11 GPa pada Vf 34,88% dengan kekuatan tarik 17,48 MPa, regangan 16.64%. Kekuatan bending meningkat dengan penambahan fraksi volume. Peningkatan kekuatan bending tertinggi (tanpa perlakuan alkali) pada fraksi volume 33,7% sebesar 34.17 MPa dan modulus bending sebesar 2.10 GPa. Peningkatan fraksi volume serat sabut kelapa dapat meningkatkan ketangguhan impak, dengan nilai tertinggi sebesar 26,42 kJ/m2 pada fraksi volume 35,84%. Penampang patah pada pengujian tarik didominasi patahan tunggal sedangkan pada pengujian bending dan impak terjadi patahan banyak serta terjadi fiber pull-out. AbstractThe potential of large coir fibers needs to be investigated to make composites. The purpose of this study was to determine the effect of the volume fraction of coconut coir fiber on tensile properties, bending properties and toughness of composite impacts with a polyester matrix, MEKPO catalyst, and NaOH. Coconut coir fiber used has diameter of 0.2 mm. Composites are made by compressive with fiber volume fraction 20-35%. Tests were according to ASTM D638 standard (tensile test), ASTM D790 (bending test) and ASTM D5941 (impact test) with the izot impact method. Observation macro photo is used to analyze failure. Tensile strength and tensile strain increase with increasing volume fraction. The highest modulus of elasticity at Vf 31.4% was 0.206 GPa and it became 0.11 GPa at Vf 34.88% with a tensile strength of 17.48 MPa, strain of 16.64%. Bending strength increases with the addition of a volume fraction. The highest increase in bending strength (without alkali treatment) at 33.7% volume fraction was 34.17 MPa and bending modulus was 2.10 GPa. Increasing the volume fraction of coconut coir fiber can increase impact toughness with the highest was 26.42 kJ / m2 in the volume fraction of 35.84%. The fracture crossing in tensile testing is dominated by a single fracture while in bending and impact testing there is a lot of fracture and fiber pull-out occurs.  
Co-Authors Gugun Gundara Muh Budhi Erlangga Muh Finza Pratama Sunardi Sunardi