Combustion Synthesis for NASA's New Vision for Space Exploration
Combustion synthesis (CS) has been a popular research topic in the
last 3
decades. Motivation was due to attractive properties and
possibilities, compared
to conventional materials processing and synthesis techniques.
Although,
it is a fairly simple process, CS involves quite complex
mechanisms
that occur simultaneously at rapidly changing high temperatures in
the short
duration (few sec.) of the reaction. Gravity plays an important
role in CS;
therefore a deeper comprehension of the effects of gravity on
non-equilibrium
mechanisms is needed. Similarly, electric current activation
presents several
advantages, by overcoming kinetic and thermodynamic limitations as
well
as providing control over the properties of the reaction and final
product.
Present investigation utilized a chemical oven technique, where the
sample is
embedded in a mixture of exothermic powder mixture. It focused on
answering
essential questions by separating different mechanisms and
understanding
fundamental aspects of gravity and electric current in CS.
Phenomena investigated
included reactive settling, dissolution and precipitation, and
reactive
liquid metal flow. CS is considered as a potential technique with
various
advantages and applications in NASA s new vision for space
exploration:
Moon, Mars, and beyond!
Cosan Ünüvar Ph.D. Materials Science & Engineering, University of California, Davis B.S. Metallurgical Engr. & Materials Sci., Middle East Technical University, Turkey Novel Synthesis and Processing of Advanced Materials and Spark Plasma Sintering (SPS) Development of Combustion Synthesis for Contingency Sterilization of a Sample Return (Mars) Mission
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