Scratch Testing of Hard Ceramics: Manifestation of Viscoelasticity


  •  Witold Brostow    
  •  Nathalie Hnatchuk    
  •  Janusz Prazuch    

Abstract

Viscoelasticity is studied extensively in polymers and polymer-based composites-but hardly in ceramics. We have studied viscoelastic behavior of three ceramics as manifested in scratching tests: 98 weight % B4C + 2% hexagonal boron nitride (h-BN), 92% B4C and 8% h-BN, 91% B4C + 5% CrSi2 + 2% h-BN. Clear viscoelastic recovery (the groove depth becoming shallower within 2 minutes) is seen in all three materials, the recovery in each case of at least 90%. Taking into account viscoelasticity and introducing appropriate additives, one could significantly improve the scratch resistance of the boron carbides, and possibly of other hard ceramics as well.



This work is licensed under a Creative Commons Attribution 4.0 License.
  • Issn(Print): 1927-0585
  • Issn(Onlne): 1927-0593
  • Started: 2012
  • Frequency: quarterly

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