Preparation and Performance of Mo/Cu/Fe Multi-Layer Composite Coating with Staggered Spatial Structure by...

Area of Science:

• Materials Science
• Surface Engineering
• Tribology

Background:

• Developing advanced coatings is crucial for enhancing substrate performance.
• Traditional coating methods face limitations in achieving complex structures and strong adhesion.
• Investigating novel deposition techniques like electro-explosive spraying is essential for next-generation materials.

Purpose of the Study:

• To prepare a multi-layer composite coating with a staggered spatial structure using electro-explosive spraying.
• To investigate the mechanical properties, bonding characteristics, and wear behavior of the prepared coating.
• To evaluate the feasibility of electro-explosive spraying for creating high-performance composite coatings.

Main Methods:

• Electro-explosive spraying of Molybdenum (Mo) as a bonding layer, followed by alternating layers of high-carbon steel and aluminum bronze.
• Characterization using Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), Electron Backscattered Diffraction (EBSD), and 3D profilometry.
• Evaluation of bonding strength and friction/wear resistance through dedicated experimental testing.

Main Results:

• Successful preparation of a composite coating with a unique sponge-like spatial structure.
• Demonstrated metallurgical and mechanical bonding between adjacent coating layers.
• The coating exhibited uniform thickness, high compactness, superior bonding strength, and good wear resistance.

Conclusions:

• Electro-explosive spraying is a viable technique for fabricating multi-layer composite coatings with complex structures.
• The developed coating offers significant improvements in bonding strength and wear performance compared to conventional methods.
• This technology holds promise for applications requiring robust and durable surface protection.