Study on microstructure and mechanical properties of zirconium hydride for improvemnent of cladding assessment

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420871
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Osaka University
• Principal Investigator: MUTA Hiroaki 大阪大学, 工学研究科, 准教授 (60362670)
• Co-Investigator(Renkei-kenkyūsha): YAMANAKA Shinsuke 大阪大学, 大学院工学研究科, 教授 (00166753)
• Research Collaborator: MATSUNAGA Junji 株式会社グローバル, ニュークリア・フュエル
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 水素化物

Outline of Final Research Achievements

Non-cracked zirconium hydride samples were fabricated in Sievert's apparatus. The activation and hydrogenation temperature were carefully controlled with consideration of the volume change in the phase transformation. The crystal structure and microstructure were studied by neutron diffraction pattern analysis and EBSD observation. The Young's modulus and hardness were measured by the indentation test, and crystal orientation on the testing point was observed by EBSD.
The microstructure of hydride sample strongly depends on the fabrication condition. The hydride prepared from a-Zr displays significant stacking faults in the {111} plane and in the pseudo-layered microstructure. Strong crystal orientation dependence of mechanical properties were confirmed by the indentation test and EBSD observation.

Free Research Field

原子力材料・核燃料