FIRST STEPS TOWARD SPACE - Smithsonian Institution Libraries

112 SMITHSONIAN ANNALS OF FLIGHT
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FIGURE 17.—Development of sweat-cooled materials.
Thus, we switched over to metallic materials. Taking
advantage of the excellent properties of ceramics
we tried to weld metal and ceramics. Zones
of mixtures of ceramic and of increasing amount of
metal were sintered to the ceramic (Figure 18). By
this process advantage could be taken of the different
properties of metal and ceramic. Today the
mixtures of metal and ceramics are known as
"cermets."
NOTES
1. "Some Special Problems of Power Plants," of which this
paper is a revised and expanded version, was presented at the
AGARD First Guided Missiles Seminar, Munich, Germany,
6r\ ^Ceramics
\ \
\ Mixture (cermets)
'Metal
FIGURE 18.—Test rod and nozzle of compound material.
April 1956, and appeared under the author's name in the
History of German Guided Missiles Development (pp. 238-
252), edited by Th. Benecke and A. W. Quick and published
for and on behalf of The Advisory Group for Aeronautical
Research and Development, North Atlantic Treaty Organization
(AGARD) by the Wissenschaftliche Gesellschaft fur
Luftfahrt E. V. (Brunswick, Germany: Verlag E. Appelhans &
Co., 1957). From this source are taken Figures 1-4, 6-11, 15,
and 18 in this paper.—Ed.