A new look at the influences of load, grain size, and grain boundaries on the room temperature hardness of ceramics

International Journal of Refractory Metals and Hard Materials

Volumn 16, Issue 4-6, 1998, Pages 331-335

  Krell, A ^a  

^a FRAUNHOFER INSTITUTE FOR CERAMIC TECHNOLOGIES AND SYSTEMS   (Germany)

Author keywords

Indentation size; Theoretical modelling

Indexed keywords

ALUMINA; GRAIN BOUNDARIES; GRAIN SIZE AND SHAPE; HARDNESS; LOADS (FORCES); MICROHARDNESS;

CERAMIC MATERIALS;

EID: 0032309890     PISSN: 02634368     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0263-4368(98)00056-0     Document Type: Article

References (10)

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2. Munson DE, Lawrence RJ. Dynamic deformation of polycrystalline alumina. J Appl Physics 1979;50:223-31.
3. Graham RA, Brooks WP. Shock-wave compression of sapphire from 15 to 420 kbar. J Phys Chem Solids 1971;32:2311-2330.
4. Krell A, Blank P. Inherent reinforcement of ceramic microstructures by grain boundary engineering. J Europ Ceram Soc 1992;9: 309-22.
5. Veprek S. Novel nanocrystalline composites with hardness exceeding 50 GPa. Int J Refr. Metals & Hard Mater. (this volume).
6. Krell A. A new look at grain size and load effects in the hardness of ceramics. Mater Sci Eng A 1998;245:277-84.
7. Krell A. Improved hardness and hierarchic influences of wear in submicron sintered alumina. Mater Sci Eng A 1996;209:156-63.
8. Krell A. Interrelations between the influences of indentation size, surface state, grain size, grain boundary deformation, and temperature on the hardness of ceramics. In: Riedel R, editor. Hard materials. Weinheim: Wiley VCH, 1999 (in press).
9. Oliver WC, Pharr GM. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J Mater Res 1992; 7:1564-83.
10. Richter V. Ruthendorf M, Drobniewski J. Perspektiven feinkörniger Hartmetalle. In: Ruthhardt R, editor. Pulvermetallurgie in Wissenschaft und Praxis, vol. 13, Proc. of the Hagen Symposium Powdermetallurgy, 13-14 November 1997. Frankfurt: Werkstoff-Informationsgesellschaft, 1997:29-45.