Composite structure with aluminum-based alloy layer containing boron carbide and manufacturing method thereof

A manufacturing method of a composite structure with an aluminum-based alloy layer containing boron carbide, comprising:

• providing a substrate with a hole in the surface;
• providing an aluminum-based alloy powder containing boron carbide, wherein the aluminum-based alloy powder containing boron carbide contains aluminum, boron, carbon, and oxygen;
• and
• performing a spray coating process to melt and spray the aluminum-based alloy powder containing boron carbide into the hole of the substrate surface to form the aluminum-based alloy layer containing boron carbide, wherein
• in a region containing boron carbide of the aluminum-based alloy layer, a content of aluminum is between 4 at. % and 55 at. %, a content of boron is between 9 at. % and 32 at. %, a content of carbon is between 13 at. % to 32 at. %, a content of oxygen is between 2 at. % and 38 at. %, and an atomic ratio of the content of boron to carbon is between 0.3 and 2.7.