Refractory metal borides and composites containing them

Details Refractory metal borides and composites containing them Refractory metal borides and composites containing them

1982-12-30

1986-06-17

Williams, Howard S.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

423297, 423411, 423440, 501 12, 501 87, 501 96, C22C 2914

Patent

active

045955450

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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Gonzalez-Oliver et al., "Glass Ceramic Formation and the Preparation of Glasses by the Sol-Gel Method", Glass, Aug. 1981, pp. 304-307.
"Preparation of Glasses and Ceramics from Metal-Organic Compounds", Yoldas, Journal of Materials Science 12 (1977), pp. 1203-1208.

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