Aging effects of dodecagonal quasicrystal formed in Mn-Cr-Ni-Si alloys
Kotoba Toyonaga, Tsutomu Ishimasa
TL;DR
This study investigates the formation and aging effects of dodecagonal quasicrystals in Mn-Cr-Ni-Si alloys at 600 and 700°C, identifying optimal aging conditions for high-quality quasicrystal synthesis.
Contribution
It provides a detailed analysis of the aging process and structural quality of Mn-Cr-Ni-Si dodecagonal quasicrystals, including growth modeling and diffraction pattern analysis.
Findings
Aging at 600°C for 100 hours yields the best structural quality.
The growth process follows Johnson-Mehl-Avrami kinetics.
Structural distortion analysis guides optimal aging conditions.
Abstract
The formation of Mn-Cr-Ni-Si dodecagonal quasicrystal has been studied at 600 and 700 C. The growth process of the quasicrystal from as-cast beta-Mn phase was explained by Johnson-Mehl-Avrami equation. In order to evaluate structural quality of the quasicrystal, distortion in the diffraction pattern observed along the 12-fold axis was analyzed. This analysis indicated that the aging at 600 C for 100 h is the best condition to synthesize the quasicrystal.
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