On the ternary eutectic reaction in the Fe60Cr8Nb8B24 quaternary alloy

Author(s)

Guo, Y. ; Moreira Jorge, Jr., A. ; Kiminami, C. S. ; Bolfarini, C. ; Botta, W. J.

• Document type: Journal article
• Source: Journal of Alloys and Compounds; v. 707, p. 281-286, JUN 15 2017.
• Web of Science Citations: 1

Abstract

Recently a Fe60Cr8Nb8B24 quaternary amorphous/nanocrystalline composite coating has been successfully synthesized by high velocity oxygen fuel in our group. The composite coating shows excellent wear and corrosion resistance. In order to understand the phase evolution of the quaternary alloy during cooling and interpret its good glass forming ability, the stable phases in the as-melted ingot of the same composition were studied by X-Ray diffraction, scanning electron microscopy, transmission electron microscopy and differential scanning calorimetry. Thermodynamic calculation was performed based on a database compiled from literature. The calculated results show good agreement with the microstructural observation. It was found that Fe60Cr8Nb8B24 alloy lies very close to the eutectic point of the system, which is related to its high glass forming ability. The thermodynamic calculation could provide insightful understanding and guidance for the future amorphous composition designing in Fe-Cr-Nb-B quaternary system. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
• Grantee: Claudio Shyinti Kiminami
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/22112-8 - Production and structural, mechanical and electrochemical characterization of metallic coatings obtained by thermal spray using amorphizable alloys of the Fe-Cr-Nb-B system.
• Grantee: Yaofeng Guo
• Support Opportunities: Scholarships in Brazil - Post-Doctorate