#### Crystalmaker

Shortly explain the process called vulcanization with reference to changes in materials properties and molecular structure.(10 Marks)

c) On the provided below drawings build the structure in accordance to the given Miller indices.

A ceramic material with a cubic unit cell structure and formula AX is made from cation element (atomic radius of 2.32 Angstroms) and anion component(atomic radius of 2.66 Angstroms). Cation element standard atomic weight is132.90545 and an anion element standard atomic weight is 35.45.Calculate theoretical density of this ceramic material.(10 Marks)

b) In you own words shortly explain a process of a multigrain crystalline material formation during cooling from a liquid phase(10Marks) and explain why smaller grain size is profitable for improvement of hardness and strength material's properties(5 Marks)

e) Referring to the provided below simplified Iron-carbon phase diagramgraphically work out: I.What phase or phases exist in an alloy of 3 wt% C in Fe at 1200°C. II.Phase compositions in an alloy of 3 wt% C in Fe at 1200°C. III.Phases amount for an alloy of 3 wt% C in Fe at 1200°C.

Referring to the provided below simplified Iron-carbon phase diagram graphically work out: I.What phase or phases exist in an alloy of 3 wt% C in Fe at 1200°C. I.Phase compositions in an alloy of 3 wt% C in Fe at 1200°C. II.Phases amount for an alloy of 3 wt% C in Fe at 1200°C.

a) Show by providing required calculation for a given perfect grystall of a BCC structure and atomic weight 55.86 u. i.which one from the selected set of planes (111), (232), (321), (433) is preferrable for dislocations movement?(10 Marks) ii.for a preffarable slip plane (the answer of the question a(i)) an interpalanar distance is 1.73 Angstroms. Calculate density of the given crystalline material.(10 Marks):=

d) A ceramic material with a cubic unit cell structure and formula AX is made from cation element (atomic radius of 2.32 Angstroms) and anion component(atomic radius of 2.66 Angstroms). Cation element standard atomic weight is132.90545 and an anion element standard atomic weight is 35.45.Calculate theoretical density of this ceramic material.(10 Marks)

c) On the provided below drawings build the structure in accordance to the given Miller indices.

a) Show by providing required calculation for a given perfect grystall of a BCCStructure's and atomic weight 55.86 u. i.which one from the selected set of planes (111), (232), (321), (433) is preferrable for dislocations movement?(10 Marks) ii.for a preffarable slip plane (the answer of the question a(i)) an interpalanar distance is 1.73 Angstroms. Calculate density of the given crystalline material.(10 Marks)