Materials science and engineering
4 points * 26 lectures plus tutorials and practical classes * Second semester * Clayton * Prerequisites: MTE1510 * Corequisites: ECS2310
Introduction: ceramics, metals and polymers; bonding and atomic packing; microstructure - property relationships. Electrical conduction: resistivity and its dependence on purity, microstructure and temperature in metallic conductors. Diffusion: as mechanism of conduction in ionic materials.; molecular concept of diffusion; temperature dependence; diffusion coefficient; Fick's laws; doping of materials; purification of materials by zone refining. Semiconductors: band theory and its relationship to atomic bonding model; Fermi level; extrinsic (doped) semiconductors; semiconductor junctions, transistors, integrated circuits (IC's); manufacture of transistors and ICs. Magnetic materials: the origin of magnetic effects in solids; paramagnetism and diamagnetism; spontaneous magnetisation (ferro/anti-ferro, ferri magnetic materials); Curie temperature; domains and domain structure; exchange energy, magnetostatic energy, magnetostrictive energy, magnetocrystalline anistropy, shape anisotropy; domains and magnetisation curves. Soft magnetic materials: hysteresis and eddy current loss; Si-iron and high permeability Ni alloys; soft ferrites; losses in ferrites; applications; amorphous alloys. Hard magnetic materials: demagnetising field and DHmax; single domain particle magnets; metallic magnets (Alnico etc.); hard ferrites; rare earth magnets; design of magnets. Dielectrics: ionic, electronic and orientation polarization; dielectronic constant; temperature and frequency dependence of dielectric constant; power losses in dielectric materials; dielectric breakdown and strength; ferroelectrics; piezoelectricity. Optic fibres: use of optical fibres; power losses; Rayleigh scattering and material absorption; materials for and manufacture of optic fibres and light sources.
Recommended texts
Allison J Electronic engineering materials and devices McGraw-Hill, 1971
Cullity B D Introduction to magnetic materials Addison-Wesley, 1972
Fraser D A The physics of semiconductor devices 3rd edn, Clarendon Press, 1983
Jain G C Properties of electrical engineering materials Harper and Row, 1967
Solymar L and Walsh D Lectures on the electrical properties of materials
Tebble R S and Craik D J Magnetic materials Wiley, 1969
Wert C A and Thomson R M Physics of solids McGraw-Hill, 1964