[Moller] new collimator material?

[Jay Benesch]

90W10Cu might still be preferred, but someone competent might glance at 
these articles in Nature


https://www.nature.com/articles/d41586-018-07005-9

The final object is formed of approximately 58% ZrC ceramic and 36% 
tungsten metal, with small amounts of residual tungsten carbide and 
copper. The beauty of the method is that the porous preform is converted 
into a non-porous ZrC/tungsten composite of the same dimensions (the 
overall volume change is approximately 1–2%).


https://www.nature.com/articles/s41586-018-0593-1
Ceramic–metal composites for heat exchangers

Here we present a robust composite of ceramic (zirconium carbide, ZrC) 
and the refractory metal tungsten (W) for use in printed-circuit-type 
heat exchangers at temperatures above 1,023 kelvin9. This composite has 
attractive high-temperature thermal, mechanical and chemical properties 
and can be processed in a cost-effective manner.