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Compatibility between Be-V alloy and F82H steel

Be-V合金とF82H鋼との両立性

土谷 邦彦; 滑川 要二; 石田 卓也

Tsuchiya, Kunihiko; Namekawa, Yoji; Ishida, Takuya

ベリリウム金属間化合物を含んだベリリウム系合金(Be-Ti, Be-Vなど)は、高温で高い化学的安定性を有しており、核融合原型炉の先進中性子増倍材として期待されている。そこで、Be-V合金と構造材料であるF82Hとの両立性試験を行い、その両立性及び反応素過程について調べた。Be-V合金としては、Be$$_{12}$$V相と$$alpha$$Be相が共存するBe-7at%Vを用いた。X線回折の結果、F82Hの反応層の表面には、Be$$_{2}$$Feが観察された。また、800$$^{circ}$$Cで100時間の加熱条件では、F82Hの反応層の厚さは約10$$mu$$mであり、Beの場合と比較して約1/5であった。以上の結果より、Be-V合金がF82Hと良好な両立性を有することを明らかにした。

Beryllium alloys such as Be-Ti and Be-V have been expected as promising candidates for advanced neutron multipliers of DEMO blankets from viewpoints of high melting point, high beryllium content, low radio activation, good chemical stability. In this study, the compatibility between Be-V alloy and F82H was investigated. The Be-7at%V specimens that includes $$alpha$$Be and Be$$_{12}$$V phases were tested. From the XRD analysis of the specimens after annealing of the Be-V alloy in contact with F82H, reaction products such as BeNi and Be$$_{2}$$Fe were observed on the surface of F82H. The thickness of reaction layer between Be-V alloy and F82H was about 10$$mu$$m. Thus, it has been clarified that compatibility between Be-V alloy and F82H is better than that between Be and F82H.

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パーセンタイル:100

分野:Materials Science, Multidisciplinary

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