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Key factors in the performace of diamond tools

Key factors in the performace of diamond tools

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    Diabond Diabond Presentation Transcript

    • 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
    •  
    • Toughness index It is conventionally assumed that N is the number of cycles such that P NF = 0.5P T
    • Measure of TI and TTI for different materials
    • Crushed grain distribution (mesh)
    •  
    • Geometrical parameters of the model rr 33 
    •  
    • Weibull statistics Where Nc is the mean number of defects responsible for fracture at a stresses  
    • Weibull statistics
    • Weibull statistics With the hypothesis of uniform defects distribution (  (V) ) we obtain: and therefore
    • Weibull statistics n is the number of tests and m 1 m 2 m 3 m 1 =m 2 >m 3
    • Weibull statistics
    • Compression Data
    • Weibull Mudulus Distribution
    • Effect of Anvil Material
    • P  Geometrical Parameters A
    • Different inclusion morphology in SDA (B) and SDB (A) diamonds
    • <100> direction <111> direction (100) planes Typical inclusion distribution in a SDA family diamond
    • Thermal Stability: Combustion Temperature
    • Hardness of Different Stones With Similar Composition Quartz dimension: 0.1-0.2 mm Quartz dimension: 0.2-1.5 mm
    • White Finale White Marble (Carrara) 2.5 mm
    • Cobalt Properties Effect of ageing (2 h) on hardness Effect of alloying (1 at.%) on  transition
    • Mixture Properties
    • Mixture Properties
    • Cu/Sn Phase diagram
    • Abrasivity Measurement
    • Abrasivity Measurement
    • Sawability Measurement
    • Sawability Measurement
      • We want to acknowledge
      • De Beers Industrial Diamond Division for providing the samples
      • Italian Ministry for University and Research for partial funding
      Acknowledgements