17CH44 Material Science [D.C] syllabus for CH

INTRODUCTION:

Introduction to material science, Classification of engineering materials, Level of structure, Structure property relationships in materials.

CRYSTAL GEOMETRY AND STRUCTURE DETERMINATION:

Geometry of crystals – the Bravais lattices, Crystal directions and planes – the miller indices, Structure determination – X –Ray diffraction – Bragg law, The powder method.

ATOMIC STRUCTURE, CHEMICAL BONDING AND STRUCTURE OF SOLIDS:

Structure of atom, Periodic table, Ionization potential, Electron affinity and Electro-negativity, Primary and secondary bonds, variation of bonding character and properties, Covalent solids, Metals and alloys, Ionic solids, structure of silica and silicates, Polymers

CRYSTAL IMPERFECTIONS:

Point Imperfections, Line imperfections – edge and screw dislocations, the Burgers vector, line energy of dislocations, Surface imperfections.

PHASE DIAGRAM AND PHASE TRANSFORMATIONS:

Phase rule, Single component systems, Binary phase diagrams, Lever rule, Typical phase diagrams for Magnesia-Alumina, Copper – Zinc, iron – carbon systems, Nucleation and growth, Solidification, Allotropic transformation, Cooling curve for pure iron, Iron – Carbon equilibrium diagram, Isothermal transformations (TTT curves).

DEFORMATION OF MATERIALS AND FRACTURE:

Elastic deformation, Plastic deformation, Creep, Visco-elastic deformation, Different types of fracture.

HEAT TREATMENT:

Annealing, normalizing, Hardening, Martempering, Austempering, Hardenability, Quenching, Tempering, Carburising, Cyaniding, Nitriding, Flame hardening.

CORROSION AND ITS PREVENTION:

Direct corrosion, Electrochemical corrosion, Galvanic cells, High temperature corrosion, Passivity, factors influencing corrosion rate, Control and prevention of corrosion-modification of corrosive environment, Inhibitors, Cathodic protection, Protective coatings.

TYPICAL ENGINEERING MATERIALS:

Ferrous metals, Non ferrous metals and alloys – Aluminum and its alloys, Copper and its alloys, Lead and its alloys, Tin, Zinc and its alloys, Alloys for high temperature service, Ceramic materials – Structure of ceramics, Polymorphism, Mechanical, electrical and thermal properties of ceramic phases, Refractories, Glasses, abrasives, Organic materials – Mechanism of polymerization, Additives to polymers, Plastics, fibres and elastomers, Organic protective coatings.

COURSE OUTCOMES: The students are expected to do the following

1. Classify different types of engineering materials depending on structure property, crystal geometry and X-Ray diffraction.

2. Explain atomic structures, types of bonding and crystal imperfections.

3. Draw phase diagrams of different metals, TTT curves and explain deformation of materials.

4. Suggest different type of heat treatment techniques depending on the type of the material and they can analyze different types of corrosions and suggest preventive methods.

5. Select materials depending on type of application.

GRADUATE ATTRIBUTES:

1. Problem analysis.

2. Design/development of solutions.

QUESTION PAPER PATTERN:

• The question paper will have ten questions.
• Each full question is for 16 marks.
• There will be two full questions (with a maximum of four sub questions) from each module.
• Each full question will have sub questions covering all the topics under a module.
• The students will have to answer five full questions, selecting one full question from each module.

TEXT BOOKS:

1. Raghavan V., “Materials Science and Engineering – A First Course”, 3rdedn., Prentice Hall of India Pvt. Ltd., New Delhi, 1996

2. Hajra Choudhury S.K., “Materials Science and Processes”, Indian book distributing Co., 1982

REFERENCES:

1. Van Vlack H.L., “Elements of Material Science”, 2ndedn., Addison – Wesly Publishing Company, New York, 1964