scholarly journals A load frame for in situ tomography at PETRA III

2019 ◽  
Author(s):  
Julian Moosmann ◽  
D. C. Florian Wieland ◽  
Berit Zeller-Plumhoff ◽  
Silvia Galli ◽  
Diana Krüger ◽  
...  
Keyword(s):  
Load Frame

scholarly journals A rotational and axial motion system load frame insert for in situ high energy x-ray studies

2015 ◽  
Vol 86 (9) ◽  
pp. 093902 ◽  
Author(s):  
Paul A. Shade ◽  
Basil Blank ◽  
Jay C. Schuren ◽  
Todd J. Turner ◽  
Peter Kenesei ◽  
...  
Keyword(s):  
High Energy ◽  
Axial Motion ◽  
System Load ◽  
X Ray ◽  
Motion System ◽  
Load Frame

A Method for Extracting Quantitative Data During in-situ TEM Nanoindentation

2001 ◽  
Vol 695 ◽  
Author(s):  
A.M. Minor ◽  
E.T. Lilleodden ◽  
E.A. Stach ◽  
J.W. Morris
Keyword(s):  
Coarse Grain ◽  
In Situ Tem ◽  
Instrumented Indentation ◽  
Transmission Electron ◽  
Diamond Indenter ◽  
Load Frame ◽  
Al Thin Film ◽  
Force Displacement ◽  
Nucleation Of Dislocations

ABSTRACTThe development of a novel transmission electron microscope holder has made real time observations of nanoindentation possible. Using a piezo-ceramic loading mechanism, a diamond indenter is pushed into the surface of a sample, while the electron beam images the deforming sample in cross section. In this paper, we present the method for calibrating the force-displacement-voltage relation and load-frame compliance associated with this instrument. This allows quantitative force-displacement measurements to be obtained, in the manner of traditional indentation experiments. As an example of the utility of this technique, we present observations of the indentation behavior of an Al thin film on silicon, which have been previously shown [1]. Indentation into a coarse grain shows a displacement excursion corresponding to the nucleation of dislocations, and is compared to force-displacement responses measured with instrumented indentation techniques.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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