Diabond

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Key factors in the performace of diamond tools

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Diabond

  1. 1. Key Factors in the Performance of Sintered Diamond Tools for Stone Sawing L. Risso, M. Pareto, M. Capurro*, L. Gaggero § Centro Sviluppo Materiali Corso Perrone 24/a I-16152 Genova Italy *DEUIM, University of Genoa P.zale Kennedy, Fiera del Mare, Pad. D I-16127 Genova Italy § DIPTERIS, University of Genoa Corso Europa 26 I-16132 Genova
  2. 3. Toughness index It is conventionally assumed that N is the number of cycles such that P NF = 0.5P T
  3. 4. Measure of TI and TTI for different materials
  4. 5. Crushed grain distribution (mesh)
  5. 7. Geometrical parameters of the model rr 33 
  6. 9. Weibull statistics Where Nc is the mean number of defects responsible for fracture at a stresses  
  7. 10. Weibull statistics
  8. 11. Weibull statistics With the hypothesis of uniform defects distribution (  (V) ) we obtain: and therefore
  9. 12. Weibull statistics n is the number of tests and m 1 m 2 m 3 m 1 =m 2 >m 3
  10. 13. Weibull statistics
  11. 14. Compression Data
  12. 15. Weibull Mudulus Distribution
  13. 16. Effect of Anvil Material
  14. 17. P  Geometrical Parameters A
  15. 18. Different inclusion morphology in SDA (B) and SDB (A) diamonds
  16. 19. <100> direction <111> direction (100) planes Typical inclusion distribution in a SDA family diamond
  17. 20. Thermal Stability: Combustion Temperature
  18. 21. Hardness of Different Stones With Similar Composition Quartz dimension: 0.1-0.2 mm Quartz dimension: 0.2-1.5 mm
  19. 22. White Finale White Marble (Carrara) 2.5 mm
  20. 23. Cobalt Properties Effect of ageing (2 h) on hardness Effect of alloying (1 at.%) on  transition
  21. 24. Mixture Properties
  22. 25. Mixture Properties
  23. 26. Cu/Sn Phase diagram
  24. 27. Abrasivity Measurement
  25. 28. Abrasivity Measurement
  26. 29. Sawability Measurement
  27. 30. Sawability Measurement
  28. 31. <ul><li>We want to acknowledge </li></ul><ul><li>De Beers Industrial Diamond Division for providing the samples </li></ul><ul><li>Italian Ministry for University and Research for partial funding </li></ul>Acknowledgements

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