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MY1353 POWDER METALLURGY
1. CHARACTERISTICS AND TESTING OF METAL POWDERS
Sampling, chemical composition purity, surface contamination etc. Particle size. and its measurement, Principle and procedure of sieve analysis, microscopic analysis: sedimentation, elutriation, permeability. adsorption methods and resistivity methods: particle shape, classifications, microstructure. specific surface area. apparent and tap density. green density. green strength, sintered compact density, porosity, shrinkage.
2. POWDER MANUFACTURE AND CONDITIONING
Mechanical methods Machine milling, ball milling, atomisation. shotting Chemical methods Condensation, thermal decomposition, carbonyl. reduction by gas-hydride, dehydride process, electro deposition, precipitation from aqueous solution and fused salts, hydrometallurgical method. Physical methods: Electrolysis and atomisation processes, types of equipment, factors affecting these processes, examples of powders produced by these methods, applications, Powder Conditioning, Heat treatment, blending and mixing, types of equipment, types of mixing and blending
3. POWDER COMPACTION
Pressureless Compaction: slip casting and slurry casting. Pressure compaction- lubrication, single ended and double ended compaction, Isostatic pressing, powder rolling, forging and extrusion, explosive compaction.
4. SINTERING
Stage of sintering, property changes, mechanisms of sintering, liquid phase sintering and infiltration, activated sintering, Hot pressing and Hot Isostatic Pressing HIP, vacuum sintering, sintering furnaces and sintering atmosphere, finishing operations – sizing, coining, repressing and heat treatment.
5. APPLICATIONS
Major applications in aerospace. nuclear and automobile industries. Bearing Materials-types, self lubrication and other types, methods of production, properties, applications. Sintered Friction Materials-clutches, brake linings, Tool Materials- cemented carbides, oxide ceramics, Cermets- Dispersion strengthened materials.
TEXT BOOKS
1. Sinha..A.K., “Powder Metallurgy”, Dhanpat Rai & Sons. New Delhi, 1982.
2 . Sands. R L. and Shakespeare. C.R. “Powder Metallurgy”, George Newes Ltd. London, 1966.
REFERENCES
1. ASM Handbook. Vol. 7, “Powder Metallurgy”, Metals Park, Ohio, USA, 1990.
1. Animesh Bose., “Advances in Particulate Materials”, Butterworth - Heinemann. New Delhi, 1995.
2. Kempton. H Roll., “Powder Metallurgy”, Metallurgical Society of AMlE, 1988.
4. Ramakrishnan.P., “Powder Metallurgy Opportunities for Engineering Industries”, Oxford and IBH Publishing Co., Pvt. Ltd, New Delhi, 1987.
5. Erhard Klar., “Powder Metallurgy Applications, Advantages and Limitations”, American Society for Metals, Ohio, 1983.
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