Rangaraj, L and Divakar, C and Jayaram, V (2004) Reactive hot pressing of titanium nitride-titanium diboride composites at moderate pressures and temperatures. Journal of the American Ceramic Society, 87 (10). pp. 1872-1878. ISSN 0002-7820
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Abstract
Dense composites in the Ti-B-N system have been produced by reactive hot pressing of titanium and BN powders. The effect of the addition of a small amount of nickel (1-3 wt%) on the reaction kinetics and densification of TiN-TiB2 (40 vol %) composite has been studied. Composites of 99% of theoretical density have been produced at 1600DGC under 40 MPa for 30 min with 1% nickel. The hardness and fracture toughness of these composites are 24.5 +/- 0.97 GPa and 6.53 +/- 0.27 MPa (sq rt m), respectively. The microstructural studies on samples produced at lower temperatures indicate the formation of a transient liquid phase, which enhances the kinetics of the reaction and densification of the composite.
| Item Type: | Journal Article |
|---|---|
| Additional Information: | Copyright for this article belongs to American Ceramic Society |
| Uncontrolled Keywords: | Titanium nitride;Titanium diboride;Ceramic matrix composites;Reaction kinetics;Hot pressing;Densification; Hardness;Fracture toughness;Ceramic powders;Liquid phases;Theoretical density;Morphology;Particulate composites |
| Subjects: | CHEMISTRY AND MATERIALS > Inorganic, Organic and Physical Chemistry CHEMISTRY AND MATERIALS > Composite Materials |
| Division/Department: | Materials Science Division, Materials Science Division, Other |
| Depositing User: | Mrs Manoranjitha M D |
| Date Deposited: | 12 Sep 2006 |
| Last Modified: | 24 May 2010 09:50 |
| URI: | http://nal-ir.nal.res.in/id/eprint/2706 |
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