New hybrid zirconium/tungsten carbide ceramic for HX

Discussion about gas-turbine and other power conversion systems for halide reactors.
Asteroza
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Joined: Feb 25, 2011 1:55 am

New hybrid zirconium/tungsten carbide ceramic for HX

Post by Asteroza » Oct 21, 2018 8:34 pm

Interesting new material intended for supercritical CO2 heat exchanger use.

Uses a starting porous tungsten carbide shape, immerses it in a copper/zirconium bath, the zirconium invades/displaces the tungsten such that the tungsten seems to fill in the pores, and the copper ends up making some kind of sealing outer coating.

The one drawback with the final result, for supercritical CO2 heat exchanger use, is carbon monoxide formation from the copper coating reacting with supercritical CO2, but it seems adding a small amount of carbon monoxide in the extant CO2 seems to keep that from happening.

https://www.nature.com/articles/s41586-018-0593-1

Looks like 800C+ ops are achievable for a PCHE made with this.