Cold Compaction behavior of nano and micro aluminum powder under high

김다솜; 박광재; 김경주; 조승찬; Yusuke hirayama; Kenta Takagi; 권한상

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자료유형: 학술저널

저자정보: 김다솜 박광재 김경주 조승찬 Yusuke hirayama Kenta Takagi 권한상

저널정보: 한국복합재료학회 Composites Research Composites Research 제32권 제3호

발행연도: 2019.1

수록면: 141 - 147 (7page)

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연구결과

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In this study, micro-sized and nano-sized pure aluminum (Al) powders were compressed by unidirectional pressure at room temperature. Although neither type of Al bulk was heated, they had a high relative density and improved mechanical properties. The microstructural analysis showed a difference in the process of densification according to particle size, and the mechanical properties were measured by the Vickers hardness test and the nano indentation test. The Vickers hardness of micro Al and nano Al fabricated in this study was five to eight times that of ordinary Al. The grain refinement effect was considered to be one of the strengthening factors, and the Hall–Petch equation was introduced to analyze the improved hardness caused by grain size reduction. In addition, the effect of particle size and dispersion of aluminum oxide in the bulk were additionally considered. Based on these results, the present study facilitates the examination of the effect of particle size on the mechanical properties of compacted bulk fabricated by the powder metallurgy method and suggests the possible way to improve the mechanical properties of nano-crystalline powders.

참고문헌 (20)

참고문헌 신청

Zhao, N. / 2005 / The Effect of Mechanical Alloying on Sic Distribution and the Properties of 6061 Aluminum Composite / Journal of Material Processing and Technology 170:586~592

Kwon, H. / 2010 / Investigation of Carbon Nanotube Reinforced Aluminum Matrix Composite Materials / Composites Science and Technology 70:546~550

Park, K. / 2017 / Fabrication and Characterization of Al-SUS316L Composite Materials Manufactured by the Spark Plasma Sintering Process / Materials Science and Engineering A 691:8~15

Meyers, M. A. / 2006 / Mechanical Properties of Nanocrystalline Materials / Progress in Materials Science 51(4):427~556

Hirayama, Y. / 2018 / Cold Welding Behavior of Fine Bare Aluminum Powders Prepared by New Low Oxygen Induction Thermal Plasma System / Journal of Alloys and Compounds 768:608~612

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