scholarly journals Reorientational Dynamics and Solid-Phase Transformation of Ammonium Dicyanamide into Dicyandiamide:  A2H Solid-State NMR Study

2007 ◽  
Vol 111 (40) ◽  
pp. 11680-11691 ◽  
Author(s):  
Bettina V. Lotsch ◽  
Wolfgang Schnick ◽  
Ernst Naumann ◽  
Jürgen Senker
Keyword(s):  
Phase Transformation ◽  
Solid State ◽  
Solid State Nmr ◽  
Solid Phase ◽  
Nmr Study ◽  
Solid Phase Transformation ◽  
Reorientational Dynamics

Design of a Reconfigurable SMA-Based Solar Array Deployment Mechanism

2015 ◽  
Author(s):  
Robert Wheeler ◽  
Robert Saunders ◽  
Kelli Pickett ◽  
Cullen Eckert ◽  
Hannah Stroud ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Solid State ◽  
Environmental Conditions ◽  
Solid Phase ◽  
Solar Array ◽  
Mechanical Loads ◽  
Solar Arrays ◽  
Actuation System ◽  
Sma Actuator ◽  
Solid Phase Transformation

Shape memory alloys (SMAs), are a class of metals that possess the capability to recover substantial deformations resulting from applied mechanical loads through a solid-solid phase transformation. Typical deployment systems for solar arrays on microsats only allow for one-way deployment. However, by using an SMA actuator in place of a conventional deployment system, repeatable deployment and retraction can be achieved. Relative to conventional actuators, SMA-based solid state actuators offer a reduction in the weight, volume, and overall complexity of the system. In this study, a design of an SMA-based solar panel deployment mechanism for a typical microsat is presented. In this design, a conventional actuation system is replaced with a system of SMA torsional actuators, which allows for a deployed and stowed phase to be reached independent of environmental conditions. This design study illustrates that an SMA-based solar array deployment system can provide a viable replacement for a conventional deployment system while significantly reducing the deployment system weight, volume, and complexity.

The adsorption of chromocene and ferrocene on silica: A solid-state NMR study

2013 ◽  
Vol 744 ◽  
pp. 119-124 ◽  
Author(s):  
Kyle J. Cluff ◽  
Michael Schnellbach ◽  
Casie R. Hilliard ◽  
Janet Blümel
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Study

Investigating Sorption on Iron−Oxyhydroxide Soil Minerals by Solid-State NMR Spectroscopy:  A6Li MAS NMR Study of Adsorption and Absorption on Goethite

2005 ◽  
Vol 109 (39) ◽  
pp. 18310-18315 ◽  
Author(s):  
Ulla Gro Nielsen ◽  
Younkee Paik ◽  
Keinia Julmis ◽  
Martin A. A. Schoonen ◽  
Richard J. Reeder ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Mas Nmr ◽  
Iron Oxyhydroxide ◽  
Soil Minerals ◽  
Solid State Nmr Spectroscopy ◽  
Nmr Study
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