Advanced Engineering Materials Metallic glasses : Preparation, Properties and applications. Shape Memory Alloys (SMA) : Characteristics, Properties of NiTi alloy, Application, Nanomaterials - Preparation - Pulsed laser deposition - Chemical vapour deposition - Applications - NLO materials - Birefringence - Optical Kerr effect - Classification of Biomaterials and its applications.
1st edition, by H.J.Sawant
A detail description on Conducting Materials :Conductors - Classical free electron theory of metals - Electrical and thermal conductivity Wiedemann - Franz law - Lorentz number - Drawbacks of classical theory - Quantum theory - Fermi distribution function - Effect of temperature on Fermi function - Density of energy states - Carrier concentration in metals. Semiconducting Materials: Intrinsic semiconductor - Carrier concentration derivation - Fermi level – Variation of Fermi level with temperature - Electrical conductivity - Band gap determination - Compound semiconductors - Direct and indirect band gap - Derivation of carrier concentration in n-type and p-type semiconductor - Variation of Fermi level with temperature and impurity concentration - Hall effect - Determination of Hall coefficient - Applications. Magnetic and Superconducting Materials Origin of magnetic moment - Bohr magneton - Comparison of Dia, Para and Ferro magnetism - Domain theory - Hysteresis - Soft and hard magnetic materials - Anti-ferromagnetic materials - Ferrites and its applications. Superconductivity : Properties - Type I and Type II super conductors - BCS theory of superconductivity (qualitative) - High Tc superconductors - Applications of superconductors – SQUID, Cryotron, Magnetic levitation. Dielectric Materials Electrical susceptibility - Dielectric constant - Electronic, Ionic, Orientational and space charge polarization - Frequency and temperature dependence of polarisation - Internal field- Claussius - Mosotti relation (derivation) - Dielectric loss - Dielectric breakdown - Uses of dielectric materials (capacitor and transformer) - Ferroelectricity and applications. UNIT V