what material has greater creep resistance and why? metal plastic or ceramic?

Expert Solution

'Ceramic'.

Generally, materials have better creep resistance if they have higher melting temperatures, lower diffusivity, and higher shear strength. Close-packed structures are usually more creep resistant as they tend to have lower diffusivity than non-close-packed structures.So ceramic have higher melting point than the metals.

Metals will therefore creep at relatively low temperatures - lead begins to creep at room temperature and aluminium alloys will begin to creep from about 250°C.

Ceramics have melting temperatures much higher than metals and will only creep when they are exposed to stresses at much higher temperatures.

Creep:- is the natural tendency of a material to gradually move or permanently deform as a result of mechanical stress.

Creep Resistance :- Materials under service conditions are required to sustain steady loads for prolonged periods of time and often undergo a time-dependent deformation that is referred to as creep resistance.

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samet mamat answered 4 months ago

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