Growth of bulk - crystals by annealing of well-aligned solidification structures

Mishina, A.; Akahori, Tomohiko; Terai, Yoshikazu; Yamauchi, Isamu; Fujiwara, Yoshihiro

doi:10.1016/j.physb.2005.12.199

Cited by 3 publications

(2 citation statements)

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“…Additionally, β-FeSi2 is made from abundant raw materials and has qualities of innoxious and anti-oxidative. Therefore, β-FeSi2 is capable of developing thermoelectric materials which work at atmospheric conditions with low-cost and relatively wide temperature scope from 200℃ to 900℃ [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…At present, preparation methods of bulk β-FeSi2 including epitaxial method [1][2][3] and mechanical alloying method [5] are difficult to prepare bulk β-FeSi2 thermoelectric material with high relative density. Conventional casting method [4] of preparing bulk β-FeSi2 material is characterized by simple process and high density. However, coarse primary-precipitated phase (ε phase) which can block the diffusion of atoms is inevitable during conventional casting process.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Melt Cyclical Superheating Conditions on the Microstructure of FeSi<sub>2</sub> Alloy

Zhang

Jiang

et al. 2014

MSF

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In order to avoid coarse primary-precipitated ε phase which prolong α+ε→β phase transition time in FeSi2 material prepared by conventional casting, a cyclical superheating process of melt for preparing FeSi2 with complete α+ε eutectic structure was proposed. The effects of melt superheating conditions on the microstructure of FeSi2 were investigated. The results showed that, with the increase of the superheating temperature, the superheating time, the recycling times and the cooling velocity, the size and quantity of the ε phase reduced. Meanwhile, the number of the fine eutectic structure increased. FeSi2 sample with uniform and complete α+ε eutectic structure was successfully prepared in the conditions of melt superheating temperature at 1550°C, superheating time for 10mins, recycling 3 times,melt cooling rate of 30°C/s.

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Section: Introductionmentioning

confidence: 99%