Effects of sintering temperature on densification, microstructure and micro-hardness of intermetallic Ti-Cu alloy prepared by mechanical alloying and microwave-assisted sintering method

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Akbarpour Mohammad Reza; Torknik Fatemeh Sadat; Ebadzadeh Touraj

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Journal Paper

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Journal: Advanced Ceramics Progress Year:2024 | Volume:10 | Issue:2 Page(s): 17-22

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Title

Effects of sintering temperature on densification, microstructure and micro-hardness of intermetallic Ti-Cu alloy prepared by mechanical alloying and microwave-assisted sintering method

Author(s)

Akbarpour Mohammad Reza | Torknik Fatemeh Sadat | Ebadzadeh Touraj | Issue Writer Certificate

Keywords

mechanical alloying

Sintering

Densification

Ti-Cu alloy

Abstract

Microwave Sintering has emerged as a promising technique for the fabrication of Ti-based alloys, offering unique advantages over conventional Sintering methods. The selective and volumetric heating capabilities of microwaves can result in rapid Densification, microstructural refinement, and enhanced properties in Ti-Cu alloy systems. Therefore, this study aimed to synthesize an intermetallic alloy of Ti-50 at. % Cu through high-energy mechanical milling and a microwave-assisted Sintering method. The objective was to expedite the Sintering process of the Ti-Cu alloy using microwave assistance and analyze how this method influences the phases formed and the properties of the alloy. A Ti-50 at. % Cu powder mixture was milled for 30 hours under an argon atmosphere, then uniaxially compacted to form green samples, which were subsequently sintered by microwave heating. This method allowed for rapid consolidation without significant grain growth within a short Sintering period. The effects of the Sintering method and temperature on microstructure and mechanical properties were studied. The density of the sintered samples increased with rising temperatures, with the highest density of 6.54 g/cm³ obtained at 900°C. Microstructural examination revealed that the Ti3Cu4 and TiCu phases primarily formed, with an average grain size of approximately 28 nm. A high micro-hardness of ~880 HV was achieved for the dense alloy prepared using this method.

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