JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Overview

Course objectives: This course introduces the particulate technology to create components from powder route.

Course outcomes: At the end of this course, the student will be able to

• 1. List different stages of manufacturing using the powder metallurgy route
• 2. Describe characteristics of a P/M component
• 3. Describe the consolidation process during P/M route and identify the defects that arise
• 4. Analyse the material and design needs of a P/M component

UNIT - I

Introduction. Importance of powder metallurgy. Comparison of powder metallurgy with other manufacturing techniques. Its scope and limitations. Methods of Powder Production: chemical reduction (tungsten, iron), carbonyl decomposition (iron, nickel), atomization (pure metal and multi component alloy powders), milling (oxides), electrolysis (elemental powders).

UNIT - II

Characterization of Powders: Importance. Determining powder characteristics: particle shape, size and size distribution, specific surface area, apparent and tap density, angle of repose, green strength. compressibility / compactability, powder conditioning.

UNIT - III

Consolidation of Metal Powders I - Compaction: Theory of consolidation; Pressureless powder shaping, pressure transmission in powders. Pressure dependence of densification. Die compaction and Isostatic pressing.

UNIT - IV

Consolidation of Metal Powders II- Sintering. Mechanisms of solid state and liquid phase sintering. Factors affecting sintering. Properties of sintered parts. Hot isostatic pressing. Sinter forging. Defects in P/M route and their control, Treatment of powder metallurgy components.

UNIT - V

Testing and quality control, metallic and ceramic P/M components; Applications of P/M products: Porous parts, self-lubricating bearings, dispersion strengthened materials, cermets, electrical materials, magnetic materials.

TEXT BOOKS:

• 1. Powder Metallurgy: science, technology and materials – Anish Upadhyaya, G.S. Upadhyaya, Universities Press (2011)
• 2. Power Metallurgy: science, technology and materials – P.C. Angelo, R. Subramanian, Prentice Hall India Learning Pvt. Ltd., (2008)

REFERENCE BOOKS:

• 1. Volume 7: Powder Metallurgy, ASM Handbook – P.K. Samal and J. W. Newkird, ASM (2015)
• 2. Powder Metallurgy Science – R.M. German, Metal Powder Industry (1994) R18 B.TECH MME III YEAR