SAINS MALAYSIANA

Investigation of Effect of Various Hot Gas Atomisation and Melting Pot Temperatures on Tin Alloy Powder Product

(Kajian Kesan Pelbagai Pengatoman Gas Panas dan Suhu Periuk Lebur pada Produk Serbuk Aloi Timah)

AABDUL BASYIR^1,*, ROBBY KURNIA¹, CHERLY FIRDHARINI^1,2, DIDIK ARYANTO¹, WAHYU BAMBANG WIDAYATNO^1,3 & AGUS SUKARTO WISMOGROHO^1,3

¹Research Center for Physics, National Research and Innovation Agency, Indonesia

²Chemistry Department, Indonesia University, Indonesia
³Pusat Kolaborasi Riset Logam Timah, Indonesia

This research investigates the effect of different types of hot gas atomisation (argon, nitrogen and oxygen) and melting pot temperatures on the particle size distribution, microstructure, density and phase of tin alloy (Sn-Cu-Ni-Ge) powder products. The tin alloy powder produced by hot argon gas atomisation had the greatest density (7.84 g/cm³) and the most spherical shape. While the tin alloy powder generated by hot oxygen gas atomisation had the lowest density (6.83 g/cm³), the highest endothermic area (60.41695 area unit) and the most elongated, irregular shape. Hot argon and nitrogen gas atomisation at a melting pot temperature of 800 °C produced a higher yield of 0-25 µm powder than at 700 °C. By contrast, hot oxygen atomisation produced the opposite result. However, all the powder products prepared at 800 °C had a higher spherical shape ratio in the range of 0-25 µm. Tin alloy powder produced by hot oxygen gas atomisation comprised only the elements of Sn and Cu, while the powder generated by hot argon and nitrogen gas atomisation consisted of elements such as the ingot of this powder.

Keywords: Density; hot gas atomization; microstructure; particle size; tin alloy powder

Penyelidikan ini mengkaji kesan pelbagai jenis pengatoman gas panas (argon, nitrogen dan oksigen) dan suhu periuk lebur pada taburan saiz zarah, struktur mikro, ketumpatan dan fasa produk serbuk aloi timah (Sn-Cu-Ni-Ge). Serbuk aloi timah yang dihasilkan oleh pengabusan gas argon panas mempunyai ketumpatan terbesar (7.84 g/cm³) dan bentuk paling sfera. Manakala serbuk aloi timah yang dijana melalui pengabusan gas oksigen panas mempunyai ketumpatan terendah (6.83 g/cm³), kawasan endoterma tertinggi (60.41695 unit kawasan) dan bentuk paling memanjang dan tidak sekata. Pengatoman argon panas dan gas nitrogen pada suhu periuk lebur 800 °C menghasilkan hasil serbuk 0-25 µm yang lebih tinggi daripada pada 700 °C. Sebaliknya, pengatoman oksigen panas menghasilkan keputusan yang bertentangan. Walau bagaimanapun, semua produk serbuk yang disediakan pada 800 °C mempunyai nisbah bentuk sfera yang lebih tinggi dalam julat 0-25 µm. Serbuk aloi timah yang dihasilkan melalui pengatoman gas oksigen panas hanya terdiri daripada unsur Sn dan Cu, manakala serbuk yang dihasilkan oleh pengatoman argon panas dan gas nitrogen terdiri daripada unsur seperti jongkong serbuk ini.

Kata kunci: Keamatan; mikrostruktur; pengatoman gas panas; serbuk timah paduan; ukuran zarah

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