Oxide dependent textured crystallization on amorphous alloy surface

Abstract

Amorphous alloys produced through rapid solidification offer a host of exceptional properties, with the caveat that achieving a fully amorphous structure. In our laboratory, the FeSiBPC alloy has demonstrated substantial industrial potential, but it contends with a persistent challenge in the form of surface crystallization during large-scale manufacturing. This study delves into the phenomenon of surface crystallization, variables influencing surface crystallization and elucidate its distinctive characteristics were studied. A noteworthy breakthrough emerges with the inaugural characterization of a high-quality fiber texture within an Fe-based amorphous alloy, achieved through Electron Backscattered Diffraction. Our findings underscore the remarkable sensitivity of air pressure within the chamber, revealing its significant impact on the intensity of Bragg peaks related to surface crystals. Moreover, the crucial role of an oxide atmosphere in effectively mitigating surface crystallization and offer insights into the mechanisms governing this preventive action. This study provides valuable insights into the intricate interplay of factors governing surface crystallization in amorphous alloys, offering promising avenues for enhanced industrial applications.

Keywords

• Fe-based amorphous alloy
• Surface crystallization
• Fiber texture
• Oxygen atmosphere
• Selective oxidation