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Yusuf Nampira
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Education Materials Science & Nanotechnology

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STRUKTUR MIKRO DAN KARAKTERISTIK MEKANIK PEB U3Si2-AI TMU 2,96 g/cm3 DAN PASCA PERLAKUAN PANAS SUHU 500°C Maman Kartaman A.; Yusuf Nampira; Junaedi Junaedi; Sri Ismarwanti
Jurnal Forum Nuklir JFN Vol 7 No 2 November 2013
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2897.903 KB) | DOI: 10.17146/jfn.2013.7.2.3467

Abstract

STRUKTUR MIKRO DAN KARAKTERISTIK MEKANIK PEB U3Si2-AI TMU 2,96 g/cm3 PASCA PERLAKUAN PANAS SUHU 500°C. Telah dilakukan karakterisasi struktur mikro dan kekerasan terhadap PEB U3Si2-Al TMU 2,96 g/cm3 yang dikenakan perlakuan panas pada suhu 500°C selama 1, 3, 5 dan 7 jam. Pengamatan struktur mikro dilakukan menggunakan mikroskop optik dan SEM serta pengujian kekerasan terhadap baban kelongsong PEB U3Si2-Al menggunakan alat kekerasan makro vickers pada beban 2 Kgf. Mikrograf yang dihasilkan memiliki kualitas cukup baik yaitu bersih dari endapan pengotor baik pada kelongsong maupun inti elemen bakar bakar nuklir dan goresan amplas relatif sedikit sehingga interpretasi atau analisis hasil struktur mikro dapat dilakukan secara benar. Struktur mikro PEB U3Si2/Al kondisi as­polished memperlihatkan adanya deformasi plastis pada bagian tepi akibat pemotongan sedangkan pada bagian inti elemen bakar tidak ada perubahan signifikan. Dispersan U3Si2 memiliki bentuk tidak beraturan dengan ukuran bervariasi dari (21,2-115) µm dan tersebar relatif merata pada matrik Al. Pada dispersan teramati retakan mikro dan kenaikan waktu pemanasan tidak menyebabkan pembesaran retakan tersebut. Pengamatan struktur mikro PEB U3Si2-Al pada bagian kelongsong yang telah di etsa menunjukkan adanya perubahan ukuran butir. Semakin lama waktu pemanasan maka ukuran butir relatif semakin membesar dan berdampak pada menurunnya nilai kekerasan kelongsong AlMg2 . Hasil uji  kekerasan  PEB U3Si2-Al  yang telah diberi perlakuan panas pada suhu 500°C selama 0, 1, 3, 5 dan 7 jam berturut-turut 44,62 HV, 34,05 HV, 34,05 HV, 31,47 HV dan 32,07 HV. 
SELECTIVITY OF LAMPUNG ZEOLITE TOWARDS MATRICES CATIONS GENERATED FROM URANIUM FISSION Siti Amini; Dian Anggraini; Yusuf Nampira; Rosika Rosika; Noviarti Noviarti; Arif Nugroho
Jurnal Zeolit Indonesia Vol. 2 No. 1 (2003)
Publisher : Jurnal Zeolit Indonesia

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Selectivity of zeolite-lampung (ZKK) towards some matrices cations generated from uranium fission products has been investigated using some typical fission product-non-radioactive cations by cation exchange batch-system process. The previous investigation showed that zeolite-lampung is effectively able to absorb cesium ion from radioactive waste, consequently the presence of others cations i.e. generated cations from the uranium fission products are assumed as the competitive cations which may affect the zeolite selectivity on to Cs exchanges, on the otherhand the Cs-exchange capacity of zeolite would decrease. The main matrices cations which present in the natural zeolite are K+, Na+ and Ca2+and those are generated from fission products such as Cs+, Ba2+, Sr2+ and Ce4+ exist in the nuclear spent fuel solution. The ion exchanges of counterpart cations in zeolites with that each of Cs+, Ba2+, Sr2+ and Ce4+ ion or/and its mixtures have been examined. The selectivity of zeolite onto mentioned exchanged cations has been shown by the correlation of fraction of the cations concentration in the zeolite (Az) towards that in equilibrated solution (As). The results show that the raw zeolite Lampung selectivity is decrease in order to Cs+> Ba2+= Sr2+ > Ce4+. The exchanged capacity of zeolite into Cs+ ion is decreased by the presence of combining ions of Ba2+, Sr2+ and Ce4+, and so are those competitive cations.
SYNTHESIS AND CHARACTERIZATION OF COMPOSITE ZEOLITE-RESIN POLYMETHACRYLATE Yusuf Nampira
Jurnal Zeolit Indonesia Vol. 7 No. 2 (2008)
Publisher : Jurnal Zeolit Indonesia

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Composite of Zeolite-resin polymethacrylate have been made with various compositions of zeolite on composite. The composite were made by homogenous mixture of zeolite powder with powder of tetrahidro furfuryl methacrylate, methacrylate polymerization which was conducted by pasta phases with mixing 1 ml mixture solution of tetrahidro furfuryl methacrylate and hydroxy propyl methacrylate. A big part of zeolite in product composite was in the polymer solution phase. The balance between supporting material and matrix material around the zeolite on composite of zeolite-resin polymethacrylate obtained on the fraction of zeolite in the composite between the 46.67% of weight up to 70% of weight. Strength and hardness of zeolite-resin polymethacrylate depends on balance between zeolite and resin polymethacrylate. The optimum hardness of this composite reaches value of 29,7 N/ım2, which obtained from composite that have a fraction zeolite 46,67% of weight.
Co-Authors ARIF NUGROHO Dian Anggraini Junaedi Junaedi Maman Kartaman A. Noviarti Noviarti Rosika Rosika Siti Amini Sri Ismarwanti