12 results for "WAHYONO SUPRAPTO"
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Journal Article
Pengaruh Fraksi Penguat Fly Ash dan Temperatur Cetakan terhadap Sifat Kekerasan dan Struktur Mikro pada MMC
Metal Matrix Composite is a metal composite that utilizes an aluminum alloy as a matrix in its fabrication and has a wide application in industry. Fly ash is a coal-burning waste at the steam power plant that contains a high enough reinforcement fraction in the form of alumina (Al2O3) and silica…
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Journal Article Full text
THE INHIBITION OF 304SS IN HYDROCHLORIC ACID SOLUTION BY CERA ALBA EXTRACT
Organic inhibitors became popular for protection against corrosion especially in acid solution in acid to prevent metal dissolution. Hydrochloric acid is widely used in the pickling, cleaning, and descaling process of metals. The high performance of corrosion inhibition efficiency of Cera alba(CA)…
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Journal Article
Characterization of aluminium matrix composite of Al-ZnSiFeCuMg alloy reinforced with silica sand tailings particles
Due to the increased demand for aluminium and the prohibitive cost of producing primary aluminium, the process of making AMCs using recycled aluminium alloy as a matrix and silica sand tailing without leaching as a filler is essential to be developed. For more cost-effective, the purpose of this…
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Journal Article
Pengaruh Tekanan Vacuum terhadap Kekuatan Tarik dan Kekuatan Lentur pada Biokomposit Serat Purun Tikus (Eleocharis Dulcis)
In particular composite materials made from polymer biocomposite material which is now becoming an alternative to the metal and is very widely applied in the manufacturing industry because of its corrosion resistance and high strength ratio of specific gravity. Natural fiber began to be used for…
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Journal Article
Pengaruh Waktu dan Tekanan Gesek terhadap Kekuatan Tarik Sambungan Paduan Aluminium dan Baja Karbon pada Pengelasan Gesek Continuous Drive
The objective of this research was to investigate the effect of friction time and friction pressure on the tensile strength of the joining of two dissimilar materials, aluminum alloy AA6061 and carbon steel, with continuous drive friction welding process. Variations of friction times of 5 seconds…
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Journal Article
PERANAN AERASI DAN SILIKA SERTA LAMA PEMERAMAN TERHADAP KANDUNGAN UNSUR HARA PUPUK CAIR LUMPUR ORGANIK UNIT GAS BIO
Organic sludge biogas unit (OSBGU) is an organic product that is generally overlooked by the owner. Giving aeration and silica as treatment with longer curing 1, 2, 3, 4 and 7 days for prospective OSBGU liquid fertilizer is expected to change the percentage of the nutrient content of liquid manure…
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Journal Article
Peranan aerasi dan silika serta lama pemeraman terhadap kandungan pupuk cair lumpur organik unit gas bio
Organic Sludge Biogas Unit (OSBGU) is a product that was generally less noticed by the owner. Filtering solids and liquids of OSBGU would be very helpful for feedstuffs and fertilizer plants. Giving aeration and silica in the fluid of OSBGU as long ripening treatment with 1, 2, 3, 4 and 7 days was…
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Journal Article
PENGARUH TEMPERATUR CETAKAN TERHADAP STRUKTUR MIKRO DAN KEKERASAN PISTON HASIL PENGECORAN MENGGUNAKAN 3D PRINTING
Motorcycle users in 2019 reached 133,617,012 units in Indonesia. The impact of a large number of motorcycle certainly attracts the interest of the industry to produce two-wheeled automotive vehicles. The piston is part of the engine that functions as a compression barrier in the combustion chamber…
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Journal Article
Extraction and characterization of snail shell waste hydroxyapatite
Snail shells contain CaCO3 and can cause environmental problem due to the microbes and bacteria activity in the shells. However, the waste can be mitigated and used to use the high calcium content. It can be converted into hydroxyapatite (HAp). This study discusses the synthesis of hydroxyapatite…
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Journal Article
Pengaruh Kecepatan Pengadukan Proses Rheocasting terhadap Struktur Mikro dan Fluiditas Paduan Al-Cu
Rheocasting with the aim of developing and offering solutions to problems related to the casting process. Rheocasting is a casting process that utilizes solidification agitation to change the dendritic structure to non-dendrite (globular) by giving a variation of the stirring speed. Al-Cu is a…
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Journal Article
Pengaruh Temperatur Karbonisasi terhadap Mikrostruktur dan Pembentukan Kristal pada Biokarbon Eceng Gondok sebagai Bahan Dasar Absorber Gelombang Elektromagnetik Radar
Radar Absorbing Materials (RAM) or radar absorbing materials of radar electromagnetic waves are materials used to reduce or eliminate radiation of radar electromagnetic waves in order to avoid reflection of waves. At this time the development of RAM research leads to materials derived from nature…
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Journal Article
Effect of Sugar Palm Fiber Surface on Interfacial Bonding with Natural Sago Matrix
Palm fibers were immersed in sea water for 1, 2, 3, and 4 weeks prior to application as reinforcement of green biocomposite. Instead of common resin matrix, natural sago starch was applied as the matrix compound. The immersion treatments had significantly affected fibers surface morphology and…