Synthesis of the in-Situ Si₃N₄-SiC Composite Nano Powders by Carbothermal Reduction

• Authors: F. Çalışkan , E. Kocaman , S. Cömert
• Languages of publication: EN

Abstracts

EN

Si₃N₄-SiC micro-nano composite powder has been studied by a group of authors during the last decade. Previous works have shown that SiC-Si₃N₄ ceramics exhibits good mechanical properties and high corrosion resistance at elevated temperatures. In this study, we have tried a new approach to obtaining SiC-Si₃N₄ ceramic composite powder by changing the conditions in the carbothermal reduction process. Starting powders were quartz mineral, received from Ege-Sil Co., as silicon-source and, carbon, as silica-reducing and carburizing agent. These powders were ground in the ring mill, separately and together. Carbothermal reduction-nitridation/carburization reactions were carried out in a tube furnace at >1400°C for 4 hours under N₂ and Ar gas, used as nitriding and shielding atmosphere. The synthesized powders were characterized by X-ray diffraction, SEM, and EDS. Results have shown that production of Si₃N₄-SiC micro-nano composite powder was achieved in the modified nitrogen and argon atmosphere above 1400°C. Determination of the Si₃N₄/SiC ratio was possible with sensitive control of the system conditions.

Keywords

EN

81.05.-t

Discipline

• 81.05.-t: Specific materials: fabrication, treatment, testing, and analysis(for superconducting materials, see 74.70.-b, and 74.72.-h; for magnetic materials, see 75.50.-y; for optical materials, see 42.70.-a; for dielectric materials, see 77.84.-s; for disperse systems and complex fluids, see 82.70.-y; see also 82.75.-z Molecular sieves, zeolites, clathrates, and other complex solids; for materials properties, see sections 60 and 70)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 3
• Pages: 601-604

Dates

published

2017-03

Contributors

author

F. Çalışkan

• Sakarya University, Faculty of Technology, Department of Metallurgical and Materials Engineering

author

E. Kocaman

• Bulent Ecevit University Faculty of Engineering Department of Metallurgical and Materials Engineering

author

S. Cömert

• Sakarya University, Faculty of Technology, Department of Metallurgical and Materials Engineering

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Identifiers

DOI

10.12693/APhysPolA.131.601