Question

Which of the following is not a type of silicon nitride ceramics?

(a) Reaction bonded silicon nitride

(b) Hot pressed silicon nitride

(c) Stiff silicon nitride

(d) Pressure-less sintered silicon nitride

This question was addressed to me by my college director while I was bunking the class.

The doubt is from Ceramics in division Non Metallic Materials of Engineering Material & Metallurgy

Answer 1

Correct answer is (c) Stiff silicon nitride

Easy explanation: Silicon nitride is a fully resistant ceramic when exposed to most acids. They are classified into different types based on the manufacturing method. Their types are Reaction bonded silicon nitride (RBSN), Hot pressed silicon nitride (HPSN), Sintered silicon nitride (SSN), and Pressure-less sintered silicon nitride (PSSN).