Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1476376 | Journal of the European Ceramic Society | 2010 | 10 Pages |
Abstract
Dense ZrB2–SiC (25–30 vol%) composites have been produced by reactive hot pressing using stoichiometric Zr, B4C, C and Si powder mixtures with and without Ni addition at 40 MPa, 1600 °C for 60 min. Nickel, a common additive to promote densification, is shown not to be essential; the presence of an ultra-fine microstructure containing a transient plastic ZrC phase is suggested to play a key role at low temperatures, while a transient liquid phase may be responsible at temperatures above 1350 °C. Hot Pressing of non-stoichiometric mixture of Zr, B4C and Si at 40 MPa, 1600 °C for 30 min resulted in ZrB2–ZrCx–SiC (15 vol%) composites of ∼98% RD.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Lingappa Rangaraj, Canchi Divakar, Vikram Jayaram,