Question

The ceramic that can be used as a cutting tool?

• A. Magnesia
• B. Titania
• C. Alumina
• D. Yttria

Hint:

For cutting tools, look for materials that have high hardness, wear resistance, and the ability to withstand high temperatures. Alumina is a popular choice due to these properties.

Answer 1

The Correct Option is C

In the context of cutting tools, Alumina (Al$_2$O$_3$) is a ceramic material that is widely used due to its hardness and high wear resistance. Alumina is commonly employed in cutting tools because it can withstand high temperatures and offers good mechanical properties, which make it suitable for machining hard materials.
- Magnesia (MgO) is another ceramic material, but it is not commonly used for cutting tools because it lacks the necessary hardness and strength for efficient cutting.
- Titania (TiO$_2$) is more commonly used in other applications, such as pigments, but it is not known for being used in cutting tools.
- Yttria (Y$_2$O$_3$) is used in some specialized applications but does not have the mechanical properties required for cutting tools in the same way as Alumina.
Thus, Alumina is the correct material for cutting tools due to its hardness and strength.