Ceramic-Metal Interface Stability Conference Paper uri icon

abstract

  • The goals in this investigation were to understand the interfacial chemical reactions between nitride ceramics and reactive liquid metals when exposed to elevated temperatures. Experiments were carried out using small metal samples of Zr were placed on top of selected nitride ceramic substrates (ZrN, and HfN). The sample stage was heated in high-purity argon to about 2000°C, held for 15 minutes at the peak temperature, and then cooled to room temperature. An external video camera was used to monitor the insitu wetting and interface reactions. Post-test characterizations were conducted by scanning electron microscopy and energy dispersive spectroscopy. It was observed that the Zr is very active in the wetting of nitride ceramics at elevated temperatures. This interaction began at high temperatures before Zr melting, and a reactive transition phase formed between the ceramic and the metal. This strongly bonded layer is dense, continuous and appears to be some form of zirconium nitride.

author list (cited authors)

  • McDeavitt, S. M., Billings, G. W., & Indacochea, J. E.

complete list of authors

  • McDeavitt, SM||Billings, GW||Indacochea, JE

publication date

  • December 2001