Ultra high-temperature microwave processing, utilizing temperatures over 1900 deg C, is addressed. Primary areas of concentration involve titanium diboride TiB2 - 3 wt CrB2 and boron carbide B4C -2.5 wt C. Using 2.45 GHz radiation, high-density, crack-free specimens can be produced. The importance of casketing and coverings along with material interactions is discussed. Comparison of microwaving with conventional sintering or hot-pressing indicates that microwaving may be advantageous.
This article is from 'Ceramic Transactions. Volume 21. Proceedings of the Symposium on Microwave Theory and Application in Materials Processing Annual Meeting of the American Ceramic Society (23rd) Held in Cincinnati, Ohio on April 29 - May 3, 1991,' AD-A253 631, p375-386.