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Originally Posted by Swift
Maybe not. Yttrium oxide and zirconium oxide both form very stable ceramics (yttrium stablized zirconia is very tough stuff and very corrosion resistant). But I'm not sure how they will behave as minor components in some system and the radiochemistry changes this (radiation damage to solids, particularly alpha particle and neutron damage)
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Well there's no alpha emission and certainly no neutron emission. Strontium-90 is a pure beta emitter. Yttrium-90 is a beta and a gamma emitter.
It's the gamma part that worries me. The gamma ray is strong too. Over 2 MeV.