The mean free path of mobile dislocations in doped NaCl single crystals measured by N.M.R. between room temperature and 300°C

Alsem, W. H. M.; Hosson, de Jeff; Muenter, R; Tamler, H.; Kanert, O.

doi:10.1080/01418618208239572

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…Finally, we would like to remark that the present results summarized in Fig. 5 differ somewhat from those observed in earlier Ca þ þ doped NaCl [12]. However, in the first study both the Ca þ þ content and the applied temperature were considerably larger (7 -690 ppm, and 150-300 8C, respect-ively) than those in the present study.…”

Section: Evaluation and Discussioncontrasting

confidence: 89%

In-situ NMR study of dislocation motion in Ca++-doped NaCl crystals

Michael

Kanert

Küchler

et al. 2004

Solid State Communications

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Using a fast multi-window NMR technique, we have measured in-situ the mean jump width x of mobile dislocations during plastic deformation in a series of NaCl single crystals with varying Ca þ þ content. Aside from immobile forest dislocations, the Ca þ þ impurities form additional obstacles for the moving dislocations thus lowering x: We found that the Ca þ þ-related obstacles exhibit a pronounced non-random distribution which results in a corresponding broad distribution of x: We show that the data can be evaluated by means of an appropriate distribution function gð1=xÞ with an uncommon dependence of the observed fitting parameters on the Ca þ þ content. As expected, quenching of a sample leads to a more uniform distribution of the Ca þ þ-related obstacles resulting in a corresponding narrowing of gð1=xÞ:

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Section: Evaluation and Discussioncontrasting

confidence: 89%

In-situ NMR study of dislocation motion in Ca++-doped NaCl crystals

Michael

Kanert

Küchler

et al. 2004

Solid State Communications

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High-temperature anomaly in the yield stress of doped NaCl crystals

Jitaru

Rakhvalov

2000

Inorg Mater

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Dynamical in situ nuclear-magnetic-resonance tensile apparatus

Hackelöer

Kanert

Tamler

et al. 1983

Review of Scientific Instruments

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A combination of a servohydraulic tensile machine and NMR pulse spectrometer is described enabling nuclear-spin relaxation rates to be recorded simultaneously with stress-strain data incorporating tension as well as compression of nonmetallic as well as of metallic samples. The data of the mechanical system are as follows: Maximum load: 5000 N; minimum deformation speed: 10 μm s−1, maximum deformation speed: 3×105 μm s−1; deformation stroke: digitally controlled between 1 and 8×103 μm; bandwidth: dc to 1 kHz; resolution: 2–4 μm; temperature conditions of the sample: from 80 to 570 K. The operation and performance of the system is described by means of experiments observing nuclear-spin relaxation rates which are induced by the movement of dislocations due to the finite deformation rate of the sample.

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The mean free path of mobile dislocations in doped NaCl single crystals measured by N.M.R. between room temperature and 300°C

Cited by 6 publications

References 26 publications

In-situ NMR study of dislocation motion in Ca++-doped NaCl crystals

In-situ NMR study of dislocation motion in Ca++-doped NaCl crystals

High-temperature anomaly in the yield stress of doped NaCl crystals

Dynamical in situ nuclear-magnetic-resonance tensile apparatus

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