Processing of Fe-Based Alloys by Detonation Spraying and Spark Plasma Sintering

• Published in: Journal of thermal spray technology Vol. 30; no. 6; pp. 1692 - 1702
• Main Authors: Kuchumova, Ivanna D., Batraev, Igor S., Ukhina, Arina V., Borisenko, Tatiana A., Bulanova, Uliana E., Ulianitsky, Vladimir Yu, Dudina, Dina V., Shikalov, Vladislav S., Kosarev, Vladimir F., Bataev, Ivan A., Koga, Guilherme Yuuki, Moreira Jorge, Alberto
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2021
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Machines; Manufacturing; Materials Science; Peer Reviewed; Processes; Surfaces and Interfaces; Thin Films; Tribology; amorphous alloy; coatings; detonation spraying; microstructure; spark plasma sintering; wear resistance
• DOI: 10.1007/s11666-021-01237-4
• ISSN: 1059-9630

This work deals with iron-based amorphous alloys in the form of coatings and sintered materials. It compares the structure and properties of Fe-Cr-Nb-B alloys (Fe 66 Cr 10 Nb 5 B 19 and Fe 62 Cr 10 Nb 12 B 16 ) produced by detonation spraying and spark plasma sintering. The Fe 66 Cr 10 Nb 5 B 19 alloy has a higher glass-forming ability than Fe 62 Cr 10 Nb 12 B 16 and the gas-atomized Fe 66 Cr 10 Nb 5 B 19 feedstock powder was mainly amorphous, while the Fe 62 Cr 10 Nb 12 B 16 powder with the same particle size range was fully crystalline. Detonation spraying made it possible to produce coatings with an amorphous phase as the main phase with both powders. The microhardness of the Fe 66 Cr 10 Nb 5 B 19 coatings was lower than that of the Fe 66 Cr 10 Nb 5 B 19 sintered alloy, at the same level of porosity (< 1%). The wear resistance of the Fe 66 Cr 10 Nb 5 B 19 coatings was higher than that of the sintered Fe 66 Cr 10 Nb 5 B 19 alloy. Fe 66 Cr 10 Nb 5 B 19 and Fe 62 Cr 10 Nb 12 B 16 coatings showed close values of microhardness and wear resistance under dry linearly reciprocating conditions. Notably, the wear resistance of the coatings was higher than that of stainless steel. This work demonstrated that detonation spraying is suitable for manufacturing amorphous phase-based alloy coatings, even for compositions with moderate glass-forming ability.