Ceramic materials are typically described as which of the following?

Ceramic materials are typically described as which of the following?

• A. Ductile
• B. Brittle
• C. Soft
• D. Elastic

Answer: (B)

Ceramics are typically described as brittle. This comes from how they bond and how their internal structure behaves under stress. The strong ionic or covalent bonds in ceramics make dislocations hard to move, so the material can't deform plastically very much before failing. When stress is applied, flaws or cracks act as stress concentrators and crack quickly propagates through the material, leading to sudden fracture with little or no plastic deformation. That’s why ceramics have high hardness and compressive strength but low tensile strength and low fracture toughness — they resist deformation until a crack starts, and once it starts, it spreads rapidly. While they can be elastic in the small-strain sense, their typical failure mode is brittle rather than ductile, which is why this description fits best.

Ceramics are typically described as brittle. This comes from how they bond and how their internal structure behaves under stress. The strong ionic or covalent bonds in ceramics make dislocations hard to move, so the material can't deform plastically very much before failing. When stress is applied, flaws or cracks act as stress concentrators and crack quickly propagates through the material, leading to sudden fracture with little or no plastic deformation. That’s why ceramics have high hardness and compressive strength but low tensile strength and low fracture toughness — they resist deformation until a crack starts, and once it starts, it spreads rapidly. While they can be elastic in the small-strain sense, their typical failure mode is brittle rather than ductile, which is why this description fits best.