What Are The Mechanical Properties Of Aluminium Diboride?

Aluminum diboride (AlB2) is a ceramic material with excellent mechanical properties. Some of its key mechanical properties are:

1. Hardness: Aluminum diboride has a high hardness value of approximately 23 GPa, which is comparable to that of tungsten carbide and diamond-like carbon coatings.

2. Strength: The strength of aluminum diboride is quite high, especially at elevated temperatures. Its flexural strength at room temperature is around 400 MPa, and it retains about 70% of that strength at 1000°C.

3. Fracture toughness: Aluminum diboride has relatively low fracture toughness compared to other ceramics, but it still exhibits values in the range of 2-4 MPa·m1/2, which is better than materials like alumina.

4. Wear resistance: Due to its high hardness and strength, aluminum diboride exhibits excellent wear resistance, making it suitable for use in applications where wear resistance is important.

5. Thermal shock resistance: Aluminum diboride has good thermal shock resistance, owing to its low coefficient of thermal expansion and high thermal conductivity. These properties make it resistant to sudden changes in temperature.

Overall, aluminum diboride is a promising material for a range of applications that require high strength, wear resistance, and good thermal stability, such as cutting tools, wear-resistant coatings, and electronic components.