Kinetics of the wurtzite-to-rock-salt transformation in ZnO has been studied in the 5-7 GPa pressure range at temperatures below the activation of diffusion processes. The detailed analysis of non-isothermal experimental data using the general evolution equation describing the kinetics of direct phase transformations in solids allowed us to study the kinetic particularities of both nucleation a...

In this paper, we study the elastic properties (i.e. Bulk modulus B) of a series of early transition metal mono-nitrides and carbides crystallize in the NaCl-type face centered cubic (FCC) structure has been investigated using plasma oscillation theory of solids. The same approach has previously been applied to rock-salt structured rare-earth mono-chalcogenides [J. Alloys and Compd. 537 (2012) ...

Nine rock types including Sandstone, Limestone, Siltstone, Dolomite and Marl collected from six different rock formations of the Salt Range area of Pakistan were tested to evaluate the correlations between the uniaxial compressive strength and the corresponding values of the point load index. Two hundred rock cores were drilled and used for the uniaxial compressive strength and point load index...

In the Present study, attempt will be made to propose a new method for prediction of long-term essential creep of concrete utilizing some short-term creep tests under high temperature. To do so, regarding the similarities between essential creep of concrete and creep in viscoelastic materials, the time–temperature equivalence relation in viscoelastic materials is evaluated for concrete. This re...

The secondary lining failure of deep buried soft rock tunnel often occurs, which is obviously related to the time factor. formation mechanism this phenomenon studied in paper. Therefore, combination situ stress measurement and neural network inversion used analyze distribution characteristics stress. At same time, creep surrounding are tested laboratory, key parameters obtained. Combined with r...

The initiation, expansion, and penetration of microscopic cracks in rock is the macroscopic manifestation creep. This paper investigates mechanical creep characteristics fracture evolution processes masses with different angles, lengths, bridge dip angles. Single fractures, dual parallel groups are considered. approach comprises discrete element simulation based on continuum mechanics, utilizin...

potassium-argon analysis by stqwise dissolution provides a way to measure in detail the distribution of argon isotopes and potassium in rock salt. the method can be used for salt that contains only trace amounts of potassium, because the potassium and argon in detrital silicates within the salt are not released during the dissolution. water may be used as the solvent when relatively large amoun...