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Materials 2018, 11(11), 2215; https://doi.org/10.3390/ma11112215

Mechanical Properties of U-Cu Intermetallic Compound Measured by Nanoindentation

Institute of Materials, China Academy of Engineering Physics, P.O. Box 9071-13, Mianyang 621907, Sichuan, China
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Received: 30 August 2018 / Revised: 1 November 2018 / Accepted: 5 November 2018 / Published: 8 November 2018
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

The physico-chemical properties of the Uranium intermetallic compound are of technological importance for improvement of the safety and compatibility of nuclear engineering systems. Diffusion couple samples with U and Cu were assembled and U-Cu intermetallic compounds were fabricated at interface by hot pressure diffusion method at a treatment temperature of 350 °C to 650 °C and at a pressure of 168 MPa in a vacuum furnace. The microstructure and element distribution of the compound phase have been studied by means of SEM, EDS, and XRD. The result showed that a new phase was developed to a thickness of approximately 10 μm with a ration of U:Cu with 1:5. Mechanical properties such as elastic moduli and hardness of the compound have been studied by means of nanoindentation. The nanoindentation testing on sample indicated that hardness of Uranium intermetallic compound are higher than that of metal U and Cu. Uranium intermetallic compound and U have a Young’s moduli with 121 GPa, 160 GPa respectively. The elastic/plastic responses of U-Cu intermetallic compound and U under nanoindentation tests were also discussed in detail. View Full-Text
Keywords: uranium intermetallic compound; nanoindentation; modulus; crystal structure uranium intermetallic compound; nanoindentation; modulus; crystal structure
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Li, R.; Mo, C.; Liao, Y. Mechanical Properties of U-Cu Intermetallic Compound Measured by Nanoindentation. Materials 2018, 11, 2215.

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