Question

Which of the following is/are the ultra-tough ceramics that could be used in diesel engines?

(a) Silicon carbide and zirconia

(b) Silicon carbide, alumina, and zirconia

(c) Zirconia only

(d) Alumina and silicon carbide

This question was posed to me in an international level competition.

I need to ask this question from Materials topic in chapter Materials of Corrosion Engineering

Answer 1

Right option is (b) Silicon carbide, alumina, and zirconia

For explanation: Much research is ongoing to produce ultra-tough ceramics such as silicon carbide, silicon nitride, alumina, and zirconia. This research aims to reduce the brittleness such that these materials could be used in diesel engines and gas turbines.