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Rapid Consolidation of TiB2 via Plasma Pressure Compaction

[+] Author Affiliations
Kunal B. Kothari, Norman M. Wereley

University of Maryland

Ramachandran Radhakrishnan

Materials Modification, Inc.

Paper No. IMECE2004-62355, pp. 463-467; 5 pages
doi:10.1115/IMECE2004-62355
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Aerospace
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Aerospace Division
  • ISBN: 0-7918-4700-4 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

This paper reports on the microstructure and mechanical properties of titanium diboride (TiB2 ) consolidated by plasma pressure compaction (P2 C)* . Titanium diboride powder with 2.5 wt% of silicon nitride (Si3 N4 ) used as a sintering aid was rapidly consolidated via P2 C at 1500°C. This rapid consolidation process inhibits grain growth and ensures high strength and ductility of the consolidated material. Microstructure of the consolidated material was characterized via optical microscopy, scanning electron microscopy and wavelength dispersive spectroscopy. The consolidated specimens showed 93.5% densification with no apparent porosity. The morphology of the consolidated sample as studied by chemical composition analysis was found to be similar to that of the powder. The flexure strength, fracture toughness, Young’s modulus and Vicker hardness of the consolidated specimens were measured at room temperature. The mechanical properties were found to be equivalent if not superior to the typical mechanical properties reported in the literature.

Copyright © 2004 by ASME

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