Method for reactive preparation of a shaped body of inorganic compound of metal
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United States of America Patent
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Dec 26, 1989
Grant Date -
N/A
app pub date -
Nov 23, 1987
filing date -
Nov 28, 1986
priority date (Note) -
Expired
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Abstract
A shaped body of a refractory or other functional inorganic compound of a metal, e.g., borides, carbides, silicides, etc. of titanium, zirconium, niobium and the like in a plate-like form can be prepared by an in situ reactive sintering method in which a metal-made flat reaction capsule is filled with a mixture of the reactant powders to form a powder compact which is ignited at a periphery while the capsule is under hydraulic compression so that the exothermic reaction is efficiently and almost instantaneously propagated within the plane of the plate-like powder compact. The liquid compression medium communicates to an accumulator filled with a compressed gas so that the otherwise unavoidable sudden pressure decrease due to the shrinkage of the powder compact can be compensated by the expansion of the compressed gas to keep constancy of the pressure. When a subsstrate plate is embedded in the powder compact and the exothermic reaction is performed similarly, the powder compact is converted into a coating layer of the resultant compound which is firmly bonded to the substrate surface.
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