**2. Experimental Methods**

### *2.1. Feedstock Powders and Substrate*

In this research, commercially pure (CP) Al, and CP-Ti grade 1 powders (as feedstock powders) were employed for coating production. Commercially available AZ31B Mg alloy plate (381 mm × 455 mm × 9.5 mm) was procured from Magnesium EleKtronNorth America. The substrates were then cut from this plate. Table 1 shows the chemical composition of AZ31B Mg alloy. The substrate surface was grit blasted and then cleaned with alcohol and acetone using a hand spray bottle and N2 blow off right before cold spray process.


### **Table 1.** Chemical composition of AZ31B (wt %).
