Preparation of Ultrapure Thorium Under Outer Space Conditions

1980 ◽  
Vol 17 (4) ◽  
pp. 383-384 ◽  
Author(s):  
F. A. Schmidt ◽  
B. K. Lunde ◽  
R. A. Outlaw
Keyword(s):  
Outer Space ◽  
Space Conditions

Antistatic Composite Coаtings on the Basis of Powder Paints

2014 ◽  
Vol 1040 ◽  
pp. 3-7
Author(s):  
Sergey Panin ◽  
Sergey Y. Yazykov ◽  
Boris Ovechkin
Keyword(s):  
Magnesium Alloy ◽  
Functional Properties ◽  
Powder Mixture ◽  
Ball Mill ◽  
Outer Space ◽  
Planetary Ball Mill ◽  
Static Electricity ◽  
Protective Function ◽  
Electrostatic Deposition ◽  
Space Conditions

For operating under outer space conditions besides providing originally specified protective function, coating should often ensure accomplishment of functional properties, for instance conductivity of electric current. The solution of this problem can be reached by adding powder fillers with specified functional properties into powder paint. The paper deals with development of technique for formation of protective conducting coatings by filling powder paints and treatment in planetary ball mill. For protection of magnesium alloy shells the technique is offered which combines formation of the oxidized sublayer, introduction of electroconductive filler, treatment of the powder mixture in the planetary ball mill and electrostatic deposition of sifted mixture of definite dispersion. This allows sinking of static electricity from cabinets of the equipment for the space-crafts applications in conditions of the outer space.

Experimental simulator of outer-space conditions for the study of friction and wear

2009 ◽  
Vol 30 (6) ◽  
pp. 381-384 ◽  
Author(s):  
M. A. Bronovets ◽  
V. A. Ogurechnikov ◽  
N. G. Solov’yev ◽  
Yu. L. Chizhov ◽  
M. Yu. Yakimov
Keyword(s):  
Friction And Wear ◽  
Outer Space ◽  
Space Conditions

Void Formation in Radial Solidification of Cylinders

1992 ◽  
Vol 114 (1) ◽  
pp. 32-39 ◽  
Author(s):  
C. D. Sulfredge ◽  
L. C. Chow ◽  
K. A. Tagavi
Keyword(s):  
Outer Space ◽  
Void Formation ◽  
Solidification Process ◽  
Earth’S Gravity Field ◽  
Solidification Sequence ◽  
Solidification Pattern ◽  
Void Shape ◽  
Thermal Energy Storage Systems ◽  
Space Conditions ◽  
Dissolved Air

Experiments were carried out to observe the solidification sequence and void distribution for two different experimental liquids (cyclohexane and butanediol) enclosed in Pyrex tubes. Both liquids exhibited about ten percent volumetric shrinkage during the phase transition from liquid to solid. To evaluate the possibility of regulating void formation by soluble gases, tests were conducted both in the presence and absence of dissolved air. A physical model has been developed which predicts the essential features of the solidification pattern under earth’s gravity field of 1-g for cylindrical geometries and allows extrapolation of the results to outer space conditions of 0-g. Finally, an attempt was made to determine analytically the final void shape which would result from each nucleated bubble in 0-g. Understanding these aspects of the solidification process is vital to development of better thermal energy storage systems for space power applications.

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