Nanoindentation study of bulk zirconium hydrides at elevated temperatures

JOURNAL OF ALLOYS AND COMPOUNDS

卷:726

Article

Cinbiz, M. Nedim¹  Balooch, Mehdi²  Hu, Xunxiang¹  Amroussia, Aida^1,3  Terrani, Kurt¹ 

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Univ Calif Berkeley, Berkeley, CA 94720 USA

[3] Michigan State Univ, E Lansing, MI 48824 USA

关键词: Zirconium hydrides;    Bulk hydride;    Nanoindentation;    Temperature dependent elastic modulus;    delta hydrides;    Reduced elastic modulus;   

DOI  :  10.1016/j.jallcom.2017.07.319

来源: Elsevier

【 摘 要 】

The mechanical properties of zirconium hydrides were studied using nano-indentation technique between 25 and 400 degrees C. Temperature dependency of reduced elastic modulus and hardness of delta- and epsilon-zirconium hydrides were obtained by conducting nanoindentation experiments on bulk hydridesamples with independently heating capability of indenter and heating stage. The reduced elasticmodulus of delta-zirconium hydride (H/Zr ratio = 1.61) decreased from similar to 113 GPa at room temperature to similar to 109 GPa at 400 degrees C, while its hardness decreased significantly from 4.1 GPa to 2.41 GPa in the same temperature range. For epsilon-zirconium hydrides (H/Zr ratio = 1.79), the reduced elastic modulus decreased from 61 GPa at room temperature to 54 GPa at 300 degrees C, while its hardness from 3.06 GPa to 2.19 GPa. Published by Elsevier B.V.

【 授权许可】

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