東京大学 · 材料科学
Huilong Yang教授の研究室では、ジルコニウム合金の微細組織制御と界面結合メカニズムの解明を柱として、合金化元素の効果や固体相拡散接合における界面反応・強化機構を詳細に解析しています。特にモリブデンの優れた強化効果や、Cr/Zry4界面におけるインタメタルリック化合物の形成挙動に注目し、原子レベルの微細構造と機械的性質の関係を解明しています。核燃料被覆材や高温構造材料の開発に貢献する高耐久性材料の創出を目指しています。
Figures are computed from collected data and may differ slightly.
The alloying effects of Sn, Nb, Cr, and Mo on zirconium alloys were elucidated and compared. Electron backscatter diffraction, transmission electron microscopy, tensile test, and fractographic observation were jointly utilized to carry out detailed microstructural characterization and mechanical property evaluation. Results show that Mo is the most effective among these elements from the viewpoints of strengthening and reducing grain size. The strengthening mechanism for each element is also dis
Solid-state diffusion bonding between pure Cr and Zircaloy-4 (Zry4) was studied with and without 316 stainless steel (SS) as an interlayer at temperatures ranging from 1203 to 1573 K, followed by the detailed microstructural analysis and mechanical property evaluation at the bonding interfaces. For the samples directly bonded between Cr and Zry4, two regions were confirmed at the diffusion interface. One was a continuous block of Zr2Cr intermetallic compound formed by the inter-diffusion of Cr a
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