Microstructure and properties of arc sprayed coatings containing Fe-based amorphous phase

作者：Fu Binyou^*; He Dingyong; Zhao Lidong; Li Xiaoyan

来源：Transactions of the China Welding Institution, 2009, 30(4): 53-56.

• Amorphous phase
• Arc spraying
• Laminated microstructure
• Microstructure and properties
• Mild steel substrates
• Nanocrystalline grains
• Scherrer formula
• Volume content

In the present study, a Fe-based cored wire was used to deposit coatings containing Fe-based amorphous phase and fine crystallites on a mild steel substrate by arc spraying. The micro-structure and properties of coatings were investigated by XRD, SEM, TEM and micro-hardness meter;and the grain size of the coatings was determined from the corresponding peak via the Scherrer formula. The experiment results show that the coating has homogenous laminated microstructure and contains only a little micro-pores and oxides, Fe-based amorphous phase and nanocrystalline grains are observed in the coating, and the grain size of the crystalline is between 10-40 nm. The volume content of the amorphous phase in the coating amounts to 55.3% by the X-ray diffraction intensity curve. The coating is hard, with microhardness value about 1260 HV0.1.

• 出版日期2009
• 单位北京大学