Mechanical behaviour and fracture mechanism of flux grown holmium orthoferrite single crystals |
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| Authors: | Monita Bhat KK Bamzai BM Wanklyn |
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| Institution: | a Crystal Growth and Materials Research Laboratory, Department of Physics and Electronics, University of Jammu, Baba Saheb Ambedkar Road, Jammu 180006, India
b Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX13PU, UK |
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| Abstract: | Results of indentation induced microhardness and fracture studies on (110) and (001) planes of flux grown HoFeO3 single crystals using a Vicker's hardness tester, in the load range of 10-100 g are presented. The variation of microhardness with load is found to be non-linear and is explained by using Hays and Kendall's law. The hardness results and the indentation-induced cracking yields the values of the yield strength, fracture toughness and brittleness index for (110) and (001) planes of HoFeO3 crystals. Transition from Palmqvist to median crack systems takes place at higher loads for (110) plane of the crystal whereas (001) plane is characterized by Palmqvist cracks only. |
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| Keywords: | D Mechanical properties |
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