Composite Materials MCQ with answer and solution

Concept

Mechanical properties of ceramic materials

Formula

NONE

Step-by-step solution

1. Ceramics are inorganic, non-metallic solid materials characterized by ionic or covalent bonding. 2. They generally possess high hardness, high brittleness, and linear elastic behavior at low to moderate temperatures. 3. Malleability is a property of metals that allows deformation under compressive stress; ceramics cannot undergo significant plastic deformation without fracturing. Answer: D

Explanation

Ceramics are inorganic, non-metallic materials characterized by strong ionic or covalent bonds, which make them very hard and brittle. Malleability is the ability of a material to be hammered or pressed into thin sheets without breaking, which is a characteristic feature of metals rather than ceramics. Because ceramics fracture easily under tensile or compressive impact, they lack malleability.

Why the other options are wrong

A) Ceramics possess high hardness due to strong ionic and covalent bonding. B) Ceramics are inherently brittle materials that fracture without significant plastic deformation. C) Ceramics exhibit elastic behavior with virtually no yield ductility at low temperatures.

Shortcut

Ceramics are brittle and break, so they lack Malleability.

Common mistake

Assuming ceramics possess metal-like plastic deformation capabilities, overlooking their total lack of malleability.