Journal of Materials Science

, Volume 5, Issue 4, pp 345–350

Structure and properties of tantalum carbide crystals

  • D. J. Rowcliffe
  • W. J. Warren
Papers

DOI: 10.1007/BF02397788

Cite this article as:
Rowcliffe, D.J. & Warren, W.J. J Mater Sci (1970) 5: 345. doi:10.1007/BF02397788

Abstract

Single crystals of tantalum carbide, up to 2 mm in size have been grown from solution in a bath of molten iron. The slip plane was found to be {111} using a two-surface analysis on etch-pitted crystals deformed by microindentation at room temperature. Observations of etch-pit patterns around inclusions suggest that slip occurs on other planes at elevated temperatures. Maximum microhardness values between 3800 and 5200 Knoop (100 gm load) were found at a composition TaC0.83±0.01. In regions of crystals with a carbon content less than TaC0.83 a phase transformation was seen close to microhardness indentations in samples decarburised below 2200† C. The mechanical behaviour of tantalum carbide is discussed with reference to a general model for the electronic structure of carbides.

Copyright information

© Chapman and Hall Ltd. 1970

Authors and Affiliations

  • D. J. Rowcliffe
    • 1
  • W. J. Warren
    • 1
  1. 1.Lockheed Palo Alto Research LaboratoryPalo AltoUSA
  2. 2.Brown Boveri Research CenterBadenSwitzerland
  3. 3.Needham LaboratoriesBrunswick CorpNeedhamUSA