Abstract No.:
5177

 Title:
Microstructure and properties of Fe-based amorphous coatings by cold spray and HVOF

 Authors:
Hyung-Jun Kim / RIST, Republic of Korea
Sang Hoon Yoon/ RIST, Korea
Jin Hong Kim/ RIST, Korea

 Abstract:
Fe based alloy powders with two Cr compositions were prepared by gas atomization. Powders prepared was characterized and sieved to 25~75 mm for the cold spray and HVOF. It was possible to make thin coatings using Nitrogen gas and thick coatings using Helium gas by cold spray although most of the coatings have shown cracks in the coatings due to high hardness of the feedstock powders. Uniform coatings were prepared by HVOF although the hardness of the coatings was lower than those of the powders and the coatings by cold spray. Results of electrochemical corrosion test in 3% NaCl solution have shown that the coatings by HVOF are comparable to bulk SUS304.

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