6. glass making and intro to powder metallurgy

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6. glass making and intro to powder metallurgy

  1. 1. Typical process sequence for glass working Raw material: Principal component: silica (SiO2) Additives: Na2O, CaO, K2O • Discrete process for piece ware like bottle, light bulbs • Continuous process of making flat glass/tube: used for glass window/lab wares, fluorescent light • Fiber making processes: fibers for insulation or fiber glass composite
  2. 2. Shaping of pieceware Processes • Spinning • Pressing • Blowing • Casting Spinning Pressing
  3. 3. s re P an s w lo B an d d w lo b w lo b
  4. 4. Rolling of flat plate Float process
  5. 5. Drawing of the glass tube
  6. 6. Drawing of continuous glass fiber
  7. 7. Powder Metallurgy Process Element or alloy metal powder Additives (lubs or binders) Blending Compaction Sintering Optional secondary Manufac Optional secondary Fininshing Finished P/M Product
  8. 8. Production of Metal particles (a,b): atomization by gas (c): atomisation by water (d): centrifugal atomization
  9. 9. Conventional Powder Metallurgy: Production Sequence
  10. 10. 1. The blending techniques
  11. 11. 2. The compaction techniques 3. The sintering technique
  12. 12. Special Pressing and Sintering Technique Isostatic Pressing Cold Isostatic Pressing Hot Isostatic Pressing
  13. 13. Combined pressing and sintering
  14. 14. Few Powder Metallurgy Products

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