Numerical Simulation and Experimental Study of Deposition Behavior for Cold-Sprayed Nano-Structured HA/70wt.%Ti...

Area of Science:

• Materials Science
• Surface Engineering
• Biomaterials

Background:

• Nanostructured composites enhance interfacial adhesion and coating strength.
• Hydroxyapatite (HA)/Titanium (Ti) composites offer potential for improved biomaterial coatings.

Purpose of the Study:

• To investigate the cold spray deposition behavior of HA/Ti composite particles.
• To analyze the influence of processing parameters on coating properties.
• To correlate numerical simulations with experimental results.

Main Methods:

• Numerical simulations using ABAQUS/CAE and LS-PrePost.
• Cold spray experiments with varying particle velocities and gas temperatures.
• Microstructural and phase composition analysis via SEM and XRD.

Main Results:

• Simulations accurately predicted experimental deposition behavior.
• Increased particle velocity and gas temperature led to greater deformation, cracking, and splashing.
• A gas temperature of 500°C resulted in superior particle bonding and coating density compared to 700°C.

Conclusions:

• Cold spray parameters significantly impact HA/Ti composite particle deposition.
• Lower gas temperatures (500°C) are favorable for achieving dense, well-bonded coatings.
• Optimized cold spray processes are key for developing advanced HA/Ti biomaterial coatings.