| Abstract: |
Amorphous alloys (also called as metallic glasses), exhibiting disordering structure and unique properties, have been considered as the one of most significant and advanced engineering materials in the new century. The amorphous coatings based on metallic glassy systems prepared by thermal spray techniques have gained increasing attentions in the last decade due to their excellent mechanical and chemical resistance and extensive potential applications. Despite amorphous coatings own very good corrosion- and wear-resistance, the poor bonding strength and weak damage tolerance upon impact loading of this kind of coatings become the major obstacle for the applications where collisions often happen. In this talk, the recent developments of HVOF-sprayed Fe-based amorphous coatings in authors group are briefly summarized. Special attention will focus on the enhancement of bonding strength and impact resistance of the amorphous coatings via various structure modifications, including the addition of different types of foreign particles (ductile stainless steel particles, oxide particles and polymer particles), amorphous powders surface decorating, and the formation of laminar structures. The microstructures, mechanical behaviors and corrosion properties of the modified amorphous coating are studied in detail from both experimental and theoretical aspects. Finally, we will briefly talk about the potential applications of amorphous and amorphous in different industries.
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