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首页> 美国政府科技报告 >Directly Susceptible Tribocor 532N Crucibles for Noncarbon Uranium Melting and Casting.
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Directly Susceptible Tribocor 532N Crucibles for Noncarbon Uranium Melting and Casting.

机译：直接敏感的Tribocor 532N坩埚用于非碳铀熔炼和铸造。

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A new material, Tribocor 532N (an alloy of 50 wt % niobium-30 wt % titanium-20 wt % tungsten (50Nb-30Ti-20W) nitrided at >1800/degree/C), has been shown to be an excellent crucible/susceptor for melting and casting uranium and its alloys in a noncarbon environment. Testing has progressed from very small-scale initial tests to intermediate-scale foundry tests with performance better than graphite containment. Lifetime tests of Tribocor 532N indicate an improvement of more than an order of magnitude as compared to graphite. The Tribocor 532N is far superior to oxide-based ceramics and experiences no cracking from thermal cycling, is capable of directly suscepting in an induction field for induction heating, and is stable with graphite---allowing any portion of a graphite stack to be replaced interchangeably with Tribocor 532N. Tribocor 532N can be coated with standard paint, and it performs equally well with the more economical zirconia coating instead of yttria, while also being compatible with erbia coatings that are suitable for enriched uranium. Since Tribocor 532N contains no carbon, a Tribocor crucible should introduce less carbon during melt cycles and enable more recycled metal to be used without increasing carbon levels. The long lifetime projections for Tribocor 532N make the material economical. A large-scale crucible of Tribocor 532N will be tested. 14 refs., 11 figs., 7 tabs. (ERA citation 14:011350)

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