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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Challenges in optimizing the resistance to corrosion and wear of amorphous Fe-Cr-Nb-B alloy containing crystalline phases

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Koga, G. Y. [1] ; Ferreira, T. [2] ; Guo, Y. [1] ; Coimbrao, D. D. [1] ; Jorge Jr, A. M. ; Kiminami, C. S. [3] ; Bolfarini, C. [3] ; Botta, W. J. [3]
Total Authors: 8
[1] Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil
[3] Jorge Jr, Jr., A. M., Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 555, MAR 1 2021.
Web of Science Citations: 12

The conflicting role of crystalline phase on the corrosion and wear resistance of the glass former Fe66Cr10Nb5B19 alloy was investigated. Amorphous to crystalline structures were produced by amorphous ribbons annealing and solidification of the liquid into a wedge-shaped copper mold. Amorphous and amorphous/nanocrystalline microstructures displayed good balance of properties. Their corrosion resistance remained elevated since alpha-(Fe,Cr) and (Fe,Cr)(2)B crystals were non-percolated within the corrosion-resistant amorphous matrix. Wear resistance was still high because (Fe,Cr)(2)B is even harder than the amorphous matrix. Crystalline microstructures were resistant against wear thanks to the large fraction of (Fe,Cr)(2)B and (Fe,Cr)NbB, both effective to protect the softer alpha-(Fe,Cr) matrix. Their corrosion resistance, however, was severely compromised, given the elemental partitioning to form crystals, with the interfaces more prone to corrode. While amorphous and amorphous/nanocrystalline microstructures presented the best-combined resistance to corrosion and wear, the crystalline microstructures are interesting for load-bearing applications where high corrosion resistance is not required. (AU)

FAPESP's process: 17/09237-4 - Design and production of spray-formed boron-modified stainless steels with high corrosion and wear resistance
Grantee:Guilherme Yuuki Koga
Support Opportunities: Scholarships in Brazil - Post-Doctoral
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-Doctoral