Material for high temperatures

Details Material for high temperatures Material for high temperatures

2004-01-27

2008-08-05

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

C501S096100, C501S096500, C501S098400

Reexamination Certificate

active

07407903

ABSTRACT:
The present invention relates to a material for use at temperatures exceeding 1200° C. and in oxidizing atmospheres consisting generally of an alloy between a metal, aluminium (Al) and carbon (C) or nitrogen (N). The invention is characterized in that the alloy has a composition MZAlYXWwhere M essentially consists of titanium (Ti), chromium (Cr) and/or niobium (Nb) and where X is carbon (C) or where X is nitrogen (N) and/or carbon (C) when M is titanium (Ti); and in that z lies in the range of 1.8 to 2.2, y lies in the range of 0.8-1.2 and w lies in the range 0.8-1.2, and wherein a protective oxide layer of Al2O3is formed after heating to the mentioned temperature.

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Salama et al., “Synthesis and Mechanical Properties of Nb2A1C and (Ti,Nb)2A1C”, Journal of Alloys and Compounds, vol. 347, 2002, pp. 271-278.
Khoptiar et al., “Ti2A1C Ternary Carbide Synthesized by Thermal Explosion”, Materials Letters, vol. 57; 2002, pp. 72-76, paragraphs 1 and 4.
Ramaseshan et al., “Microstructure and Some Properties of TiA1-Ti2A1C Composites Produced by Reactive Processing”, Intermetallics, vol. 7, 1999, pp. 571-577.

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