Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Improvement of Microstructure and Microhardness of Cold-Sprayed FeAl Intermetallic Compound Coating by Annealing Treatment

Version 1 : Received: 17 June 2023 / Approved: 20 June 2023 / Online: 20 June 2023 (12:39:13 CEST)

A peer-reviewed article of this Preprint also exists.

Wang, H.; An, F.; Bai, X.; Yao, H.; Zhang, M.; Chen, Q.; Ji, G.; Ramachandran, C.S. Improvement of Microstructure and Sliding Wear Property of Cold-Sprayed FeAl Intermetallic Compound Coating by Annealing Treatment. Coatings 2023, 13, 1260. Wang, H.; An, F.; Bai, X.; Yao, H.; Zhang, M.; Chen, Q.; Ji, G.; Ramachandran, C.S. Improvement of Microstructure and Sliding Wear Property of Cold-Sprayed FeAl Intermetallic Compound Coating by Annealing Treatment. Coatings 2023, 13, 1260.

Abstract

In the present study, a nanostructured FeAl coating was prepared by cold spraying of ball milled powder. Annealing treatment was applied to the coating to investigate its effect on the microstructure, phase structure and microhardness of the cold-sprayed nanostructured FeAl coating. The results showed that the FeAl phase was kept unchangeable when the coating annealed at the temperature above 500oC. Annealing temperature significantly influenced the microstructure and microhardness of cold-sprayed FeAl coating. With raising annealing temperature, the lamellar structure in the as-sprayed coating disappeared and a dense coating microstructure with fully bonding of deposited particles at their interfaces was achieved after annealing at 950oC. Nanograin growth of the FeAl phase occurred at an annealing temperature higher than 800oC. The microhardness of cold-sprayed FeAl coating remained about 400 Hv0.1 at the annealing temperature below 800oC and decreased to 300 Hv0.1 at 1100oC.

Keywords

cold spraying; FeAl; coating; microstructure; microhardness; annealing treatment

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

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