_____ is made of Aluminium, Nickel and Cobalt.

Answer

The answer to the question is "Alnico."

### Step-by-Step Solution:

1. **Identify the Elements**: The question asks for a material made of Aluminium, Nickel, and Cobalt.

2. **Recall the Combination**: When Aluminium (Al), Nickel (Ni), and Cobalt (Co) are combined, they form a specific alloy.

3. **Name the Alloy**: The alloy formed from Aluminium, Nickel, and Cobalt is known as "Alnico."

4. **Understand its Use**: Alnico is a ferromagnetic material, which means it can be magnetized and is used to make permanent magnets.

5. **Final Answer**: Therefore, the blank should be filled with "Alnico."