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INDONESIA
Jurnal Pendidikan Fisika Indonesia
Published by Universitas Negeri Semarang
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education,
Education Physics
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue " Vol 5, No 1 (2009)" : 12 Documents clear
PEMANFAATAN SERBUK TEMPURUNG KELAPA SEBAGAI ALTERNATIF SERAT PENGUAT BAHAN FRIKSI NON-ASBES PADA KAMPAS REM SEPEDA MOTOR Kiswiranti, D.; Sugianto, -; Hindarto, N.; Sutikno, -
Jurnal Pendidikan Fisika Indonesia Vol 5, No 1 (2009)
Publisher : Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Abstract

Serbuk tempurung kelapa dapat dimanfaatkan sebagai serat penguat bahan friksi non-asbes. Dalam penelitian ini, komposisi 20%dan 30% serbuk tempurung kelapa ditemukan yang paling optimum untuk parameter kekerasan dan keausan. Bahan friksi dengankomposisi 20% memiliki kekerasan sebesar 77,5 kgf.mm-2 dan keausan sebesar 28,25 mm2/kg. Bahan friksi dengan komposisi30% serbuk tempurung kelapa mempunyai kekerasan sebesar 58,8 kgf.mm-2 dan keausan sebesar 34 mm2/kg. Untuk dapatdiaplikasikan pada sepeda motor, desain sampel disesuaikan dengan spesifikasi kampas rem sepeda motor. Coconut char powder can be used as reinforcement fibers of non asbestos brake frikcion materials.In this research, the contents ofcoconut char powder of 20 % and 30 % show optimum hardnes and wear resistances. The brake frikcion material with 20 % coconutchar powder is found hardnes as well as 77,5 kgf.mm-2 and the wear resistance is 28,25 kgf.mm-2/kg. The brake frikcion materialwith the coconut char powder 30% volume has hardnes of 58,8 kgf.mm-2/kg and the wear resistance of 34 mm2/kg. To be applied inthe fabrication of motorcycle spare spart, the sample design is necessary adapted with motorcycle brake.Keywords: frictim material; motorcycle brake; fiber material; coconut char powder
OPTIMIZATION AND CHARACTERIZATION OF ELECTRON BEAM RESIST USING ATOMIC FORCE MICROSCOPY Sutikno, -
Jurnal Pendidikan Fisika Indonesia Vol 5, No 1 (2009)
Publisher : Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Abstract

Resis negatif ma-N 2403 dan 495 K PMMA memiliki resolusi yang baik untuk aplikasi litografi berkas elektron (EBL). Ketebalanresist optimal memainkan peran penting dalam paparan berkas elektron. Oleh karena itu, dalam penelitian ini, ketebalan darikedua resist yang dioptimalkan menggunakan spincoater dalam jangkauan laju spin 1000-6000 rpm. Semakin laju spin meningkat,ketebalan resist menurun juga. Morfologi permukaan resist dikarakterisasi dengan mikroskop gaya atom. Butir butir resist nampakpanjang. Dalam analisis AFM, permukaan profil resist negatif ma-N 2403 dan 495 K PMMA nampak seperti kerucut. Negative resist ma-N 2403 and 495 K PMMA have good resolution for electron beam lithography (EBL) application. The optimumresist thickness plays significant role in e-beam exposure. Therefore, in this research, thicknesses of both resists were optimizedusing spincoater within spin speeds of 1000-6000 rpm. As spin speed increased, resist thickness decreased as well. Morphology ofresist surfaces were characterized using atomic force microscopy (AFM). Grains of resist show long grains. In AFM analyses,surface profiles of negative resist ma-N 2403 and 495 K PMMA show cone peaks.Keywords: e-beam resist; spincoater; e-beam lithography

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