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All Journal Natural B Specta Journal of Technology
Istiroyah Istiroyah
Fakultas MIPA Universitas Brawijaya Jalan Veteran Malang 65145
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science

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Filler Composition Effects on Tensile Strength And Composite Material Toughness of Rice-Resin Husk Powder Istiroyah Istiroyah; L. Nuriyah; Retnowati Retnowati
Natural B, Journal of Health and Environmental Sciences Vol 1, No 4 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10.193 KB) | DOI: 10.21776/ub.natural-b.2012.001.04.8

Abstract

The rice husk flour- resincomposite has been made. This research aims to make the rice husk flour - resin composite and analyze the effect of filler composition to their tensile strength and toughness. The filler composition used is 0%, 10%, 20%, 30, 40%, 50% dan 60%. The Results of tensile test show that the best tensile strength is 113.02 ±11.60 MPa for polystiren sample. The best toughness with impact test is 47.92±0,36 KJ/m2 for 30% filler with polyester resin.
Effects of Adhesives on Quality Biomass Briquette Abdurrouf Abdurrouf; Istiroyah Istiroyah; Gancang Saroja
Natural B, Journal of Health and Environmental Sciences Vol 1, No 1 (2011)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (559.209 KB) | DOI: 10.21776/ub.natural-b.2011.001.01.1

Abstract

Production of briquettes from organic waste with starch as an adhesive, has been done. The briquette's quality is improved by (i)  the milling of organic waste is conducted in dry phase, and (ii) the mixing between organic waste and starch as an adhesive is carried out on raw phase. This study shows that the best briquette was obtained when the ratio of organic wastes - starch was 10:3. In such composition, mass of the produced briquette was more than 50% of the mass of organic waste. For more improvement, it is necessary to find a better pressing and drying technique. It is also need to make briquette in large numbers to improve its characterization.
Pengerasan Baja AISI 316L Menggunakan Metode Pack Carburizing Bersumber Karbon Kayu Mahoni muhammad ghufron; Istiroyah Istiroyah; Rena Wahju Dhiaul In’am
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (600.809 KB) | DOI: 10.35718/specta.v5i2.361

Abstract

Peningkatan kekerasan paduan baja dapat dilakukan dengan meningkatkan kandungan karbon dipermukaanya. Baja AISI 316 L yang memiliki kekerasan awal 189 HV300 dapat ditingkatkan kekerasannya melalui peningkatan jumlah karbon dipermukaan dengan metode pack carburizing. Pada penelitian ini kayu mahoni digunakan sebagai sumber karbon aktif yang diperoleh dengan pemanasan dan pengayakan 150 mesh. Pack carburizing dilakukan pada suhu tinggi yakni 700oC, 750oC, 800oC dan 850oC selama 8 dan 16 jam yang kemudian dilakukan uji kekerasan menggunakan micro vickers hardness tester. Semua spesimen hasil pack carburizing mengalami kenaikan kekerasan dibandingkan dengan spesimen tanpa perlakuan dengan range kenaikan sebesar 24-367 HV3. Kekerasan tertinggi diperoleh pada pemanasan selama 16 jam pada suhu 700oC. Hasil pengujian sudut kontak menunjukkan adanya perubahan sifat pada permukaan dari hidrofilik ke hidrofobik untuk semua sampel sementara dari hasil mikroskop optik diperoleh distribusi ukuran butir kurang dari 60 µm dengan dominan range 15-25 µm.
Co-Authors abdurrouf Abdurrouf Cholisina A. Perwita Fakhrusy Rizki Ramadhan Gancang Saroja Kurriawan Budi Pranata L. Nuriyah Levinus Gobay Muhammad Ghufron Rena Wahju Dhiaul In’am Retnowati Retnowati