Synthesis of 312 phases and composites thereof

Details Synthesis of 312 phases and composites thereof Synthesis of 312 phases and composites thereof

1996-03-06

1999-08-24

Lewis, Michael

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 971, 423324, C01B 3300

Patent

active

059424559

ABSTRACT:
Products having single phases or solid solutions of the formula M.sub.3 X.sub.1 Z.sub.2 wherein M is a transition metal, X is Si, Al or Ge and Z is B, C or N can be prepared by taking a powdered mixture containing M, X and Z to a temperature of about 1000.degree. C. to about 1800.degree. C., optionally simultaneously under a pressure of about 5 MPa to about 200 MPa. The products so formed have excellent shock resistance, oxidation resistance and machinability. The products may also be present as composites, preferably composites which are in thermal equilibrium with the single phase or solid solutions of the formula M.sub.3 X.sub.1 Z.sub.2.

REFERENCES:
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patent: 4670458 (1987-06-01), Petzow et al.
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Pampuch et al., "Solid Combustion Synthesis of Ti.sub.3 SiC.sub.2 ", J. European Ceramic Soc. 5:283-287 (1989).
Pampuch et al., "Ti.sub.3 SiC.sub.2 -Based Materials Produced by Self-Propagating high-Temperature Synthesis (SHS) and Ceramic Processing", J. Materials Synthesis and Processing 1(2):93-100 (1993).
Okano et al., "Synthesis and Mechanical Properties of Ti.sub.3 SiC.sub.2 Ceramic" Advanced Materials '93, I/A: Ceramics, Powders, Corrosion and Advanced Processing, edited by N. Mizutani et al., Trans. Mat. Res. Soc. Jpn., vol. 14A (Elsevier 1994).
Racault et al., Solid-State Synthesis and Characterization of the Ternary Phase Ti.sub.3 SiC.sub.2, J. Materials Science 29:3384-3392 (1994).
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