Refractory metal borides and composites containing them
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United States of America Patent
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Jun 17, 1986
Grant Date -
N/A
app pub date -
Dec 30, 1982
filing date -
Dec 30, 1982
priority date (Note) -
Expired
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Abstract
Refractory metal borides, carbides, nitrides and mixtures thereof of the Group IVb, Vb and VIb metals are produced from a glass or microcrystalline gel formed from organo-metallic precursors. Typically TiO.sub.2.B.sub.2 O.sub.3 glass is produced by hydrolysis of titanium butoxide and trimethyl borate, followed by gelling/drying. The glass may have carbon inclusions or may be mixed with carbon or aluminum powder or a mixture thereof, and reacted. In the case of aluminothermic and carboaluminothermic reduction, there is a residual aluminum-containing phase in the product. Composites can also be produced by including inert materials in the reaction mixture.
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