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Production and structural, mechanical and electrochemical characterization of metallic coatings obtained by thermal spray using amorphizable alloys of the Fe-Cr-Nb-B system.

Grant number: 14/22112-8
Support Opportunities:Scholarships in Brazil - Post-Doctorate
Effective date (Start): September 01, 2015
Effective date (End): August 31, 2017
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:Walter José Botta Filho
Grantee:Yaofeng Guo
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys, AP.TEM


The failures of engineering materials from corrosion, oxidation, friction, abrasion and fatigue are commonly initiated in the surface, and therefore the composition and microstructure of this region is of relevance in obtaining the final desired properties such as resistance to abrasion, wear and corrosion. Different systems require different types of surface protection and in this project we study Fe-based amorphous coatings to be used on pipes of interest in the chemical industry, where the desirable properties are high resistance to abrasion, to wear and to corrosion. In this context, the objective of the present project is the production of metallic coatings with excellent characteristics of resistance to corrosion and wear, using easy glass former alloys of the Fe-Cr-Nb-B system and the processes of HVOF and cold spray. To achieve this objective, a detailed evaluation of the alloys already studied in our group will be carried out, to optimized the compositions according to the desired properties, and the coatings produced by thermal spray will be characterized in terms of the structure and microstructure, and the mechanical and electrochemical properties.

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GUO, Y.; KOGA, G. Y.; MOREIRA JORGE, JR., A.; SAVOIE, S.; SCHULZ, R.; KIMINAMI, C. S.; BOLFARINI, C.; BOTTA, W. J.. Microstructural investigation of Fe-Cr-Nb-B amorphous/nanocrystalline coating produced by HVOF. MATERIALS & DESIGN, v. 111, p. 608-615, . (14/22112-8)
KOGA, G. Y.; FERREIRA, T.; GUO, Y.; COIMBRAO, D. D.; JORGE JR, A. M.; KIMINAMI, C. S.; BOLFARINI, C.; BOTTA, W. J.. Challenges in optimizing the resistance to corrosion and wear of amorphous Fe-Cr-Nb-B alloy containing crystalline phases. Journal of Non-Crystalline Solids, v. 555, . (17/09237-4, 13/05987-8, 14/22112-8)
GUO, Y.; MOREIRA JORGE, JR., A.; KIMINAMI, C. S.; BOLFARINI, C.; BOTTA, W. J.. On the ternary eutectic reaction in the Fe60Cr8Nb8B24 quaternary alloy. Journal of Alloys and Compounds, v. 707, p. 281-286, . (13/05987-8, 14/22112-8)
GUO, Y.; MOREIRA JORGE, JR., A.; COSTA E SILVA, A.; KIMINAMI, C. S.; BOLFARINI, C.; BOTTA, W. J.. Experimental and thermodynamic investigation of the microstructural evolution of a boron-rich Fe-Cr-Nb-B alloy. Journal of Alloys and Compounds, v. 713, p. 119-124, . (14/22112-8, 13/05987-8)

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