Mechanical behaviour and fracture mechanism of flux grown holmium orthoferrite single crystals

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.     

Exafs study of structural phase transitions in RbVF4

Successive structural transitions of RbVF₄ have been studied with extended X-ray absorption fine structure (EXAFS) of Rb ions. It is found that there are some modulations in the pre-edge and post-edge regions of the X-ray absorption spectrum in the vicinity of the structural phase transitions above room temperature. By analyzing the EXAFS, it is also found that local spatial distortions around the Rb ions are induced at the structural transitions.     

Diffusion von D?mpfen, als Mittel zur Unterscheidung zwischen scheinbaren und wirklichen Dampfdichten

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Bestimmung von Dampfdichten bei niedrigen Temperaturen

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Ueber die Analyse von Trinkwassern

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Die fractionirte Destillation in ihrer Anwendung zur Trennung von K?rpern mit naheliegendem Siedepunkte

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