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Hardness Studies and Fracture Behaviour on Flux‐grown YFeO 3 Single Crystals
Author(s) -
Bamzai Krishen,
Kotru P. N.,
Wanklyn B. M.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310617
Subject(s) - orthoferrite , fracture toughness , materials science , indentation hardness , brittleness , yttrium , composite material , fracture (geology) , brittle fracture , flux (metallurgy) , metallurgy , microstructure , physics , magnetization , quantum mechanics , magnetic field , oxide
Results of Vickers' microhardness ( H v ), fracture toughness ( K c ), brittleness index ( B i ) of (110) and (001) faces of flux‐grown yttrium orthoferrite crystals, in the load range of 10–100 g, are given. The cracks are classified into Palmqvist and median types. The transition from Palmqvist to median type of cracks is shown to take place when the applied load exceeds 50 g. Application of the formula of NIHARA et al. for only median cracks leads to calculation of more precise values for fracture toughness and brittleness index than what was reported earlier (BAMZAI et al.) as an average value.