1. Development of advanced ternary beryllium intermetallic compounds.
- Author
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Hwang, Taehyun, Kim, Jae-Hwan, Sugimoto, Yutaka, Akatsu, Yoshiaki, Nakano, Suguru, and Nakamichi, Masaru
- Subjects
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INTERMETALLIC compounds , *BERYLLIUM compounds , *THERMAL properties , *THERMAL conductivity , *SPECIFIC heat , *THERMAL diffusivity - Abstract
A ternary beryllide was prepared by mixing Be 12 V with Be 12 Ti and using plasma sintering. After preparation at a pressure of 54 MPa for 20 min at 1200 °C, the changes in mechanical and thermal properties due to the addition of 1 wt.% Be 12 V and 10 wt.% Be 12 V were investigated. The Vickers hardness of both Be 12 Ti+1 wt.%Be 12 V and Be 12 Ti+10 wt.%Be 12 V were lower than Be 12 Ti. In addition, the fracture toughness was calculated using the IF method, and the calculation formula was calculated using various equations. According to the Anstis equation, it was 3.23 ± 0.13 MPa·m0.5 for Be 12 Ti, and it increased to 4.47 ± 0.13 MPa·m0.5 for Be 12 Ti+1 wt.%Be 12 V. As Be 12 V was added, it increased compared to Be 12 Ti. In the case of thermal properties, the thermal diffusivity of Be 12 Ti and Be 12 Ti+1 wt.%Be 12 V showed almost the same value, while that of Be 12 Ti+10 wt.%Be 12 V was lower than others. In the case of specific heat, moreover, it tended to decrease as the temperature increased in comparison to Be 12 Ti. This trend was particularly evident when 10 wt.% Be 12 V was added. Thus, the results of the thermal conductivity calculation indicated a decrease in tendency as the amount of addition increased in comparison to Be 12 Ti. Therefore, the addition of 1 wt.% Be 12 V seems to be more effective than the addition of 10 wt.% Be 12 V. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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