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Subarmono Subarmono
Fakultas Teknik, Universitas Gadjah Mada, Yogyakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Pemanfaatan Limbah Abu Terbang Sebagai Penguat Aluminium Matrix Composite Subarmono Subarmono; Jamasri Jamasri; M.W. Wildan; Kusnanto Kusnanto
Jurnal Teknik Mesin Vol. 10 No. 2 (2008): OCTOBER 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

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Abstract

This research aims to utilize fly ash which is obtained from waste of combustion of coal in steam power plant as a reinforcement of aluminum matrix composite (AMC). The amounts of fly ash of 2.5%, 5%, 7.5% and 10% wt were added to fine aluminum powder (dimension of particles are smaller than 40 µm). Each composition was mixed using a rotary mixer for 3 hr. The mixture was uniaxially pressed and it was followed by isostatic compaction with a pressure of 100 MPa to produce green bodies. They was pressureless sintered in argon atmosphere at various temperatures of 500°C, 525°C, 550°C, 575°C and 600ºC. Bending strength, Vickers hardness, wear resistance, density of the AMC were tested, and the microstructures were observed using SEM. The results show that the mechanical properties increase with increasing the fly ash content up to 5% wt. The bending strength, hardness, porosity and wear rate are 74 MPa, 66 VHN, 4.5% and 0.04 mg/(MPa.m), respectively. Abstract in Bahasa Indonesia: Penelitian ini bertujuan untuk memanfaatkan abu terbang sebagai penguat komposit bermatrik aluminium (AMC). Abu terbang merupakan limbah pembakaran batu bara pada pembangkit listrik tenaga uap. Abu terbang sejumlah 2,5%; 5%; 7,5% dan 10% berat dicampur dengan serbuk aluminium (ukuran serbuk lebih kesil dari 40 µm). Setiap campuran diaduk menggunakan rotay mixer selama 3 jam. Campuran aluminum dan abu terbang dikompaksi secara uniaksial dilanjutkan kompaksi secara isostatik dengan tekanan 100 MPa dan diikuti sintering tanpa tekanan dengan lingkungan gas argon dan variasi temperatur 500°C, 525°C, 550°C, 575°C dan 600°C. Kekuatan bending, kekerasan Vickers, ketahanan aus dan densitas komposit diuji serta struktur mikro diamati menggunakan SEM. Hasil pengujian menunjukkan bahwa sifat mekanis meningkat seiring dengan peningkatan fraksi berat abu terbang sampai 5% berat, selebihnya terjadi penurunan. Kekuatam bending, kekerasan Vickers, porositas dan laju keausan berturut-turut 74 MPa, 66 VHN, 4,5% dan 0,04 mg/(MPa.m). Kata kunci: Aluminum Matrix Composite, abu terbang, kompaksi, isostatik.
UTILIZATION OF FLY ASH WASTE AS REINFORCEMENT OF ALUMUNIUM MATRIX COMPOSITE PRODUCED USING POWDER MERALLURGY (Pemanfaatan Limbah Abu terbang sebagai Penguat Alumunium Metal Matrix Composite Dibuat dengan Cara Metaalurgi Serbuk) Subarmono Subarmono; Jamasri Jamasri; M.W. Wildan; Kusnanto Kusnanto
Jurnal Manusia dan Lingkungan Vol 18, No 2 (2011): Juli
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jml.18814

Abstract

ABSTRAKPada penelitian ini telah dilakukan pembuatan aluminium matrix composite (AMC) dari serbuk aluminium sebagai matrik dan limbah abu terbang sebagai penguat. Sejumlah abu terbang yaitu 2,5; 5; 7,5 dan 10% berat ditambahkan pada bubuk aluminium. Campuran abu terbang dan serbuk aluminium dikompaksi secara aksial dengan tekanan 100 MPa dan dilanjutkan dengan proses sintering tanpa tekanan dengan lingkungan gas argon pada berbagai temperatur yaitu 500˚, 525˚, 500˚, 575˚ dan 600˚C. Pengujian kekuatan bending menggunakan metode four point bending, kekerasan menggunakan metode Vickers, laju keausan menggunakan metode pin on disk dan porositas menggunakan metode Archimedes serta struktur mikro diamati menggunakan SEM. Hasil penelitian menunjukkan bahwa kekuatan bending dan kekerasan meningkat, laju keausan dan porositas menurun seiring dengan bertambahnya abu terbang pada AMC sampai 7,5% berat, namun bila kandungan abu terbang lebih dari 7,5% berat sifat AMC menunjukkan kebalikannya. Porositas, kekuatan bending, laju keausan dan kekerasan terbaik yaitu pada AMC dengan 7,5% berat abu terbang berturut-turut sebesar 5,4%, 68,5 MPa, 0,0571 mg/(MPa.m) and 62,6 VHN. Hal ini menunjukkan bahwa kekuatan bending, kekerasan dan ketahanan aus AMC lebih baik dibanding aluminium murni.ABSTRACTAluminum matrix composite (AMC) has been prepared from aluminum fine powder as a matrix and fly ash waste as reinforcement. In this research the amount of fly ash as much as 2.5, 5, 7.5 and 10 wt%  was added to the aluminum fine powder. The mixture was compacted using uniaxial with a pressure of 100 MPa and it was pressureless sintered in argon atmosphere at various temperature of 500°, 525°, 550°,575° and 600ºC. Bending strength of AMC was determined using four point bending, hardness was tested using Vickers method, wear rate was tested using pin on disk method, porosity was tested using Archimedes method and the micro structure was observed using SEM. The result shows that fly ash can be used as reinforcement of AMC. The bending strength and Vickers hardness of AMC increase, wear rate and porosity of AMC decrease with increasing the fly ash content up to 7.5 wt%, while fly ash higher than 7.5 wt% causes a decrease. Porosity, bending strength, wear rate and hardness of AMC are 5.4%, 68.5 MPa, 0.0571 mg/(MPa.m) and 62.6 VHN, respectively. It show that bending strength, hardness and wear resistance of AMC are higher than pure aluminum
Co-Authors Jamasri . Kusnanto Kusnanto M.W. Wildan