Ceramics-Silikáty (Mar 2016)

EFFECT OF NdB₆ ADDITION ON DENSIFICATION AND PROPERTIES OF ZrB₂

  • J.K. Sonber,
  • T.S.R.Ch. Murthy,
  • Sairam K.,
  • Chakravartty J.K.

DOI
https://doi.org/10.13168/cs.2016.0006
Journal volume & issue
Vol. 60, no. 1
pp. 41 – 47

Abstract

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This paper reports on the effect of NdB₆ addition on densification and properties of ZrB₂. NdB₆ powder (2.5,5 and 10wt.%) was added to ZrB₂ powder and consolidated by hot pressing. It was found that NdB₆ addition assisted in densification of ZrB₂ at lower hot pressing temperature of 1750°C. Formation of solid solution was observed at the interface of ZrB₂ and NdB₆ phases. Hardness was found to be slightly increased by 2.5wt.% NdB₆ addition but decreased by 5 and 10% NdB₆ addition. Fracture toughness of composite is found to be higher than the monolithic ceramic. It was found that composite samples have excellent oxidation resistance at 900°C in air.

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