EPR ( ELECTRON PARAMAGNETIC RESONANCE ) KARAKTERISASI INKLUSI KARBON DALAM KARBIDA BORON*)

Authors

  • H. Purwanto Jurusan Teknik Mesin Fakultas Teknik Universitas Wahid Hasyim Semarang

DOI:

https://doi.org/10.36499/jim.v3i1.674

Abstract

Dalam Karbida Boron,  ketergantungan lebar garis  (delta B)  resonansi paramagnetik elektron
(EPR) dengan g = 2,0028 dalam karbon bebas;  Cc, digunakan untuk menentukan rasio
perbandingan Permukaan dan Volume  (S/V)  dari inklusi karbon bebas. Pengurangan secara
berurutan dari  Cc, dilakukan dengan menggunakan metode oksidasi vakum rendah  (Low-
Vacuum Oxidation) dengan merubah tingkat temperatur. Sejumlah karbon bebas (fase grafit)
dalam sampel, diukur dengan menggunakan sinar-X. Analisa perubahan delta B (Cc) menunjukkan
bahwa inklusi karbon bebas pada lapisan permukaan partikel Polycrystalline Boron Carbide
memiliki rasio  S/V  dua kali lebih kecil dibanding inklusi karbon bebas pada bagian dalam
partikel Polycrystalline Boron Carbide.
Kata Kunci : EPR, Karakterisasi, Boron

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Issue

Vol. 3 No. 1 (2007)

Section

Articles

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