About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Novel Cermet Waste Forms for Nuclear Applications |
Author(s) |
Nathaniel Marrero, Nathan Sponenberg, Alyssa Piechota, Samuel Gross, S.K. Sundaram |
On-Site Speaker (Planned) |
Nathaniel Marrero |
Abstract Scope |
Cermets or ceramic metal matrix composites show promise as versatile waste forms for a wide range of nuclear waste streams. Combination of metals and ceramics in cermets can potentially enhance the ductility, chemical durability, and overall strength of the waste forms. We have produced four series of cermet samples by hot pressing and spark plasma sintering containing zirconia, silicon carbide, and sodalite combined with stainless steel 316 or Hastelloy. We varied the composition of the cermets via ceramic-metal ratio with over 20 – 50 volume% of ceramics. We have characterized the cermet samples using scanning electron microscope and electron dispersive spectroscopy, the immersion method, mercury porosimetry, and x-ray diffraction. We have produced several cermet samples with a wide range of densities (65-99%) and porosity (<1-24%) values. We will present the preliminary microstructure development, density, and porosity of these waste forms demonstrating viability of these novel waste forms for nuclear applications. |