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. Sugondo
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Materials Science & Nanotechnology

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ANALISIS ENERGI AKTIVASI PRESIPITAT FASA KEDUA PADA PADUAN Zr1%Nb1%Sn1%Fe DENGAN DIFRAKSI SINARX . Sugondo; Meniek Rachmawati
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 18, No 1 (2012): Februari 2012
Publisher : website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2012.18.1.643

Abstract

ANALISIS ENERGI AKTIVASI PRESIPITAT FASA KEDUA PADA PADUAN Zr-1%Nb-1%Sn-1%Fe DENGAN DIFRAKSI SINAR-X. Penelitian ini bertujuan untuk menganalisis energy aktivasi fasa kedua pada ingot paduan Zr-1%Nb-1%Sn-1%Fe hasil sintesa. Ingot dibuat dengan peleburan busur tunggal. Selanjutnya sampel dianil pada temperatur 400 °C, 500 °C, 600 °C, 700 °C dan 800 °C selama 2 jam. Analisis difokuskan pada presipitat fasa kedua (Secondary Phase Precipitate/SPP). Identifikasi energy aktivasi berdasarkan pola difraksi sinar-X dan dibantu dengan data JCPDF (Joint Committee Powder Diffraction File). Hasil pola difraksi beserta datanya dianalisis secara manual, tidak dapat langsung sesuai dengan data JCPDF sebab adanya distorsi terutama dari SPP. Hasil analisis disimpulkan sebagai berikut: Pada temperatur anil 400 °C, 500 °C, dan 700 °C pengintian partikel fasa kedua SPP terjadi dengan baik. Untuk paduan Zr-1%Nb-1%Sn-1%Fe pada temperatur anil antara 400 °C sampai dengan 800 °C ditemukan SPP Fe2Nb, ZrSn2, FeSn, SnZr, NbSn2, Zr0.68Nb0.25Fe0.08, Fe2Nb0.4Zr0.6, Fe37Nb9Zr54, dan w-Zr. Stabilisasi presipitat terjadi dengan baik pada temperatur anil 800 °C, pertumbuhan presipitat antara 500 °C sampai dengan 600 °C, dan minimisasi ukuran presipitat pada temperatur anil 700 °C. Diperoleh energi aktivasi Fe2Nb sebesar -7,0083 kJ/mol, energi aktivasi FeSn sebesar -2,2858 kJ/mol, energi aktivasi NbSn2 sebesar -3,1498 kJ/mol, dan energi aktivasi nano kristalit α-Zr sebesar 0,0077 kJ/mol .Kata Kunci: paduan Zr-1%Nb-1%Sn-1%Fe, pola difraksi sinar-x, presiptat fasa kedua, energy aktivasi.  ACTIVATION ENERGY ANALYSIS OF SECONDARY PHASE PRECIPITATE IN Zr-1%Nb-1%Sn-1%Fe ALLOY. The obyective of this research is to analyze of activation energies in Zr-1%Nb-1%Sn-1%Fe alloy as the product of the synthesis. The ingot was prepared by single spark melting. The samples then anneal at temperature 400°C, 500°C, 600°C, 700°C dan 800°C for 2 hours. The analyzed was focused on secondary phase precipitate/ SPP. The activation energies was identified based on X-rays diffraction pattern and supported by Joint Committee Powder Diffraction File/ JCPDF. The Result of diffraction pattern with the data were analyzed by manual, it was not done by direct meet with the JCPDF data because of the distortion of the SPP. The analyzed results were concluded as follow: The nucleation of the secondary phase precipitate/ SPP was good at the anneal temperature of 400°C, 500°C, and 700°C. The Zr-1%Nb-1%Sn-1%Fe alloy at temperature in between 400°C to 800°C were found the precipitates Fe2Nb, ZrSn2,FeSn, SnZr, NbSn2, Zr0.68Nb0.25Fe0.08, Fe2Nb0.4Zr0.6, Fe37Nb9Zr54, dan w-Zr. At temperature anneal 800°C was good for the precipitate stabilization, at temperature in between 500°C to 600°C was good for the precipitate growth, at temperature anneal 700°C was good for minimizing the precipitate size. It was found that activation energy of Fe2Nb was -7,0083 kJ/mol, activation energy of FeSn was -2,2858 kJ/mol, activation energy of NbSn2 was -3,1498 kJ/mol and activation energy of α-Zr nano crytallite was 0,0077 kJ/mol . Keywords: alloy Zr-1%Nb-1%Sn-1%Fe, pola difraksi sinar x, secondary phase precipitate, activation energy. 
PENGARUH PEMADU Mo PADA KEKUATAN MEKANIK DAN KETAHANAN KOROSI PADUAN Zr-1% Sn-1% Nb-1% Fe . Sugondo
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 17, No 3 (2011): Oktober 2011
Publisher : website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2011.17.3.678

Abstract

PENGARUH PEMADU Mo PADA KEKUATAN MEKANIK DAN KETAHANAN KOROSI PADUAN Zr-1% Sn-1% Nb-1% Fe. Penelitian paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo telah dilakukan. Ingot disiapkan dengan teknik busur listrik. Analisis kimia dilakukan dengan XRF, metalografi dengan mikroskop optik, uji kekerasan dengan kekerasan mikro vickers, dan uji korosi dengan autoclave.  Tujuan penelitian ini membuat paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo  dengan memvariasikan penambahan Mo dengan berbagai komposisi, membandingkan pengaruh kandungan Mo terhadap karakteristik logam paduan Zr-1%Sn-1%Nb-1%Fe meliputi mikrostuktur, homogenitas komposisi, kekuatan mekanik dan ketahanan korosi uap air, dan menentukan kandungan Mo yang paling optimal pada paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo  untuk pembuatan kelongsong bahan bakar nuklir yang memiliki ketahanan korosi dan kekerasan yang tinggi. Hasil yang diperoleh adalah sebagai berikut: Pemadu Mo dapat memperhalus butir pada konsentrasi 0,1%-0,3% dan lebih besar dari pada konsentrasi itu dapat memperbesar butir. Kekerasan paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo  dikendalikan oleh flaw atau dislokasi, interstisi unsur pemadu yang lebih keras, kelarutan padat unsur pemadu, dan terbentuknya fasa kedua ZrMo2. Laju korosi paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo dikendalikan oleh adanya fasa kedua ZrMo2. Konsentrasi Mo 0,3 % pada paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo ini paling baik untuk pembentukan fasa kedua. Konsentrasi Mo antara 0,3-0,5 % pada paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo baik untuk pembentukan presipitat dan kelarutan padat. Kata Kunci: paduan Zr-1%Sn-1%Nb-1%Fe-(x)%Mo, ketahanan korosi, kekuatan mekanik.   EFFECT OF ALLOYING MO ON MECHANICAL STRENGTH AND CORROSION RESISTANCE OF Zr-1% Sn-1% Nb-1% Fe alloy. It had been done research on Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy. The ingot was prepared by means of electrical electrode technique.  The chemical analysis was identified by XRF, the metallography examination was perform by a optical microscope,  the hardness test was done by Vickers microhardness, and the corrosion test was done in autoclave.  The obyective of this research were  making Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy with Mo concentration; comparing effect of Mo concentration to metal characteristics of Zr-1%Sn-1%Nb-1%Fe which covered microstructure; composition homogeneity, mechanical strength; and corrosion resistance in steam, and determining the optimal Mo concentration in Zr-1%Sn-1%Nb-1%Fe-(x)% Mo alloy for nuclear fuel cladding which had corrosion resistance and high hardness. The results were as follow: The alloying Mo refined grains at concentration in between0,1%-0,3% and the concentration more than that could coarsened grains. The hardness of the Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy was controlled either by the flaw or the dislocation, the interstition of the harder alloying element, the solid solution of the alloying element and the second phase formation of ZrMo2.  The corrosion rate of the Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy was controlled by the second phase of ZrMo2. The 0.3% Mo consentration in Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy was the best for second phase formation. The Mo concentration in between 0,3-0,5 % in Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy was good for the second phase formation and the solid solution. Keywords: Zr-1%Sn-1%Nb-1%Fe-(x)%Mo alloy, mechanical strength, corrosion resistance,
Co-Authors Meniek Rachmawati