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All Journal Majalah Ilmiah MOMENTUM Indonesian Journal of Physics and Nuclear Applications
Alaya Fadllu Hadi Mukhammad
Engineering Faculty Of Diponegoro University, Indonesia
Education Environmental Science Physics

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Manufacture of Nickel Collimator for BNCT: Smelting of Nickel Using Electrical Arc Furnace and Centrifugal Casting Preparation Mujiyono Mujiyono; Suharto Suharto; Alaya Fadllu Hadi Mukhammad; Didik Nurhadiyanto; Arianto Leman Sumowidagdo
Indonesian Journal of Physics and Nuclear Applications Vol 3 No 1 (2018)
Publisher : Fakultas Sains dan Matematika Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (886.681 KB) | DOI: 10.24246/ijpna.v3i1.21-28

Abstract

Collimator is a tube that functions to direct neutrons generated by a nuclear reactor for BNCT (Boron Neutron Capture Therapy Cancer). Appropriate design of the collimator for BNCT application is a tube with an inner diameter of 16 cm, an outer diameter of 19 cm and a length of 13 cm total with 12 pieces with nickel purity above 95%. Manufacturing of the BNCT collimator will be planned using centrifugal casting method and smelting of nickel with electrical arc (EA) furnace. This article reports on the smelting process of nickel, setting the parameters of the electrical arc furnace, and the chemical composition of the nickel. Results of the study show that nickel with purity 98% can be melted perfectly using the EA Furnace with a current of 600-800 A and a pouring temperature of 1600°C. The fluidity of nickel can hold up to 1 minute at a 35°C environment that allows for the centrifugal casting process. The chemical composition of the nickel before being melted is Ni (98.89%), Si (0.79%), S (0.17%), and Fe (0.15%) and after being melted is Ni (97.89%), Si (0.92%), S (0.26%), and Fe (0.90%). The chemical composition of the nickel after smelting in an EA Furnace meets the requirements of BNCT collimator.
KARAKTERISTIK BAHAN DASAR DIESEL CYLINDER LINER (DCL) Alaya FadlluHadi Mukhammad; Ireng Sigit Atmanto; Bambang Setyoko; Nugroho Santoso
JURNAL ILMIAH MOMENTUM Vol 11, No 2 (2015)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v11i2.1389

Abstract

Abstrak Kebutuhan Diesel Cylinder Liner(DCL) di Indonesia 114.512 buah DCL/hari untuk mendukung industry transportasi di Indonesia. Kebutuhan DCL yang tinggi tersebut, saat ini suplainya masih didominasi dari luar negeri. Industry pengecoran besi cor local sudah mencoba produksi DCL, akan tetapi kualitas DCL yang dihasilkan masih jauh dari standar. Penelitian ini bertujuan untuk mengetahui karakteristik komposisi kimia, kekerasan brinell, dan struktur mikro dari 3 jenis DCL yang beredar di industry transpotasi yaitu original merk X, tidak original, dan produk pengecoran local, sehingga dapat diketahui kualitas rendah DCL produksi local dikarenakan kualitas bahan atau factor yang lain. Hasil pengujian menunjukkan bahan dasar yang digunakan DCL produksi local menggunakan jenis besi cor yang sama dengan DCL originalya itu besi cor kelabu. Hasil pengujian kekerasan menunjukkan bahwa DCL produksi local memiliki kekerasan tertinggi yaitu 217,9 HBN, sedangkan DCL original dengan DCL tidak original menunjukkan nilai yang hamper sama yaitu 187,6 HBN dan 185,2 HBN. Hasil pengujian menunjukkan bahwa struktur mikro semua jenis DCL menunjukan struktur pearlite dan grafit (bentuk flake dengan orientasi tak beraturan)  mendominasi seluruh permukaan.   Katakunci: DCL, komposisikia, kekerasan, struktur mikro
Co-Authors Bambang Setyoko Didik Nurhadiyanto Ireng Sigit Atmanto Mujiyono Mujiyono Nugroho Santoso Suharto Suharto