MEB$2033/$MFB$2033$

$4.$ Metals, polymers, and ceramics constitute the fundamental classifications within the realm of engineering materials. $($justify and arrange the alignment$).$

a$.$ Discuss and compare metals, polymers, and ceramics in terms of tensile strength, hardness, wear resistance and modulus of elasticity. Justify your answer with sketches and examples.

$[10$ marks$]$

b$.$ Explain what factor$($s$)$ affect the melting temperature $(T_m)$ and glass transition temperature $(T_g)$ of a polymer. Schematically sketch the relationship between specific volume and temperature for glassy semicrystalline and crystalline solids.

$[9$ marks$]$

c$.$ Select a suitable polymer material for biomedical application. Justify your answer with example.

$[6$ marks$]$