Materials - Metal-Matrix Composite (MMC)
Rambo Microchip is made of a
material Metal Matrix Composite (MMC) Graphite/Epoxy (Gr/Ep). Epoxy as aluminum
(Al) or Magnesium (Mg). The material (Gr/Ep) lacks diffraction, which means
that it is in principle impossible for the X-ray (light and sound) to reflect
and thus to detect the metal (MMC) pieces on the X-ray images. MMC Material
weight 80% lighter than ordinary material.
“In technology-development programs sponsored by the U.S. Defense Advanced Research Projects
Agency and the U.S. Air Force, graphite/magnesium tubes for truss-structure
applications have been successfully produced (jointly by Lockheed
Martin Space Systems of Colorado and Fiber Materials of Maine) by the filament-winding
vacuum-assisted casting process. Figures 3a and
3b show a few of the cast Gr/Mg tubes (50 mm dia ´ 1.2 m
long) that were produced to demonstrate the reproducibility and reliability of
the fabrication method.” [2]
“When continuous-fiber reinforced MMCs were no longer needed for the
critical strategic defense system/missions, the development of those MMCs for
space applications came to an abrupt halt. Major improvements were still
necessary, and manufacturing and assembly problems remained to be solved. In
essence, continuous-fiber reinforced MMCs were not able to attain their full
potential as an engineered material for spacecraft applications. During the
same period, Gr/Ep, with its superior specific stiffness and strength in the
uniaxially-aligned fiber orientation, became an established choice for tube
structures in spacecraft trusses. Issues of environmental stability in the
space environment have been satisfactorily resolved.” [2]
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