Earth-boring tools comprising silicon carbide composite materials, and methods of forming same

A method of forming an earth-boring tool, the method comprising:

• providing a plurality of silicon carbide particles within a cavity of a mold, the cavity having a shape corresponding to at least a portion of a bit body of an earth-boring tool for drilling subterranean formations, providing the plurality of silicon carbide particles comprising:
• selecting the silicon carbide material to comprise between about one percent by weight (1 wt %) and about five percent by weight (5 wt %) aluminum, between zero percent by weight (0 wt %) and about one percent by weight (1 wt %) boron, and between about one percent by weight (1 wt %) and about four percent by weight (4 wt %) carbon;
• infiltrating the plurality of silicon carbide particles with a molten aluminum or aluminum-based material;
• and
• cooling the molten aluminum or aluminum-based material to form a solid matrix material surrounding the plurality of silicon carbide particles.