[2B17-20] 基礎物性

[2B18] Thermal and Mechanical Properties for alpha-MoSi₂

*Afiqa Mohamad¹, Yuji Ohishi¹, Fumihiro Nakamori¹, Hiroaki Muta¹, Ken Kurosaki¹, Shinsuke Yamanaka^1,2 (1.Osaka University, 2.Research Institute Of Nuclear Engineering, University of Fukui)

キーワード：Molybdenum silicide , alpha-MoSi2, Thermal conductivity, Hardness, Fracture toughness

Uranium silicides have higher uranium density compared with UO₂, which makes these materials attractive for accident-tolerant fuels (ATF) for light water reactors. To develop uranium silicide based ATF, it is necessary to understand the basic physical properties of various kinds of silicide , because silicides may be used as coating materials of the claddings and silicide precipitates may be formed in fuels through the reaction between fission products and uranium silicides matrix. In this study, we fabricated dense alpha-MoSi₂ polycrystalline sample and measured thermal and mechanical properties.