XX. Über das Verhalten verschiedener Minerale der Salzlager bei hohen Drucken und wechselnden Temperaturen

Geller, Ana Maria

doi:10.1524/zkri.1924.60.1.414

Cited by 2 publications

(2 citation statements)

References 2 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With these assumptions, a plot of the logarithm of the extrusion pressure versus l/T yields a value for H of 20 k 2 kcal/mol when n = 4.4. In summary, the value of H is around 15 kcal/mol with a rather large scatter (i: 10 kcal/mol) while reinterpretation of data from Geller (1924Geller ( . 1925 gives a similar value but with less scatter.…”

Section: (I)supporting

confidence: 60%

See 1 more Smart Citation

Water assisted dynamic recrystallization and weakening in polycrystalline bischofite

Urai

1983

Tectonophysics

132

View full text Add to dashboard Cite

Urai. J.L.. 1983. Water assisted dynamic recrystallization and weakening in polycrystalline bischofite. Tectonophwcs. 96: 125-157. Artificially prepared specimens of bischofite (MgC1,.6H,O) have been experimentally deformed at temperatures between 20 and 100°C. strain rates between 10m4 and lo-" s-', and confining pressures between 0.1 and 28 MPa. Development of microstructure with strain was studied by in-situ deformation experiments. and results of these were correlated with observations made on thin sections of deformed samples. In a first series of experiments the effect of grain size. impurity content and water content on the flow behaviour was investigated. Addition of about 0.1 wt.% water to dry samples was found to decrease the flow stress by a factor of 5. This effect was found to be associated with the formation of a thin fluid film on grain boundaries. strongly enhancing dynamic recrystallization due to the movement of high-angle gram boundaries. and possibly also to enhanced intracrystalline plasticity due to excess water present in the lattice. In a second series of experiments the strain-rate sensitivity of the flow stress of selected samples was investigated. Two regimes could be distinguished: one with a stress exponent n = 4.5 in the power law creep equation for values of the differential stress above 2.0 MPa. and one with n = 1.5 for stresses below this value. The main deformation mechanisms were intracrystalline slip. twinning, and grain-boundary sliding. Recrystallization occurred by subgrain rotation and high-angle grain-boundary migration. The rates of grain-boundary migration fell into two different regimes, one regime being distinguished by extremely fast migration rates. The applicability of the experimentally found flow law to the behaviour of bischofite rocks in nature is discussed.

show abstract

Section: (I)supporting

confidence: 60%

“…Dewar (1894) reported that it could be extruded to form a wire, and Mtigge (1906) determined its (110) twin glide plane. Geller (1925) studied the temperature dependence of the extrusion pressure of bischofite, and Geller (1924Geller ( . 1930 investigated the pressure dependence of its incongruent melting point.…”

Section: Introductionmentioning

confidence: 99%

Water assisted dynamic recrystallization and weakening in polycrystalline bischofite

Urai

1983

Tectonophysics

132

View full text Add to dashboard Cite

show abstract

Water-enhanced dynamic recrystallization and solution transfer in experimentally deformed carnallite

Urai¹

1985

Tectonophysics

View full text Add to dashboard Cite

XX. Über das Verhalten verschiedener Minerale der Salzlager bei hohen Drucken und wechselnden Temperaturen

Cited by 2 publications

References 2 publications

Water assisted dynamic recrystallization and weakening in polycrystalline bischofite

Water assisted dynamic recrystallization and weakening in polycrystalline bischofite

Water-enhanced dynamic recrystallization and solution transfer in experimentally deformed carnallite

Contact Info

Product

Resources

About