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Enhancing high-temperature strength of B4C-6061Al neutron absorber material by in-situ Mg(Al)B-2
Zan, Y. N.; Zhang, Q.; Zhou, Y. T.; Wang, Q. Z.; Xiao, B. L.; Ma, Z. Y.
2019-12-01
Source PublicationJOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
Volume526
AbstractThe industrial development of dry storage method of spent nuclear fuels strongly requires the low-cost B4C-Al neutron absorber materials (NAMs) with high strength and high stability at elevated temperatures. In the present work, the B4C-6061Al composites were fabricated by powder metallurgy method with different hot-pressing temperatures. Microscopic analysis showed that as hot-pressing temperatures increased from 560 degrees C to 630 degrees C, the interfacial reactions became severe, resulting in the formation of Al3BC and Mg(Al)B-2 compounds. The mechanical properties of the composites were enhanced by the interfacial reactions, specifically, the tensile strength of the sample hot-pressed at 630 degrees C was 40-59% higher than that at 560 degrees C at testing temperatures from room temperature up to 350 degrees C. Moreover, the high-temperature-pressed sample maintained the invariant strength level after suffering annealing at 400 degrees C for 8000 h. Characterization of the fractured composite indicated that the Mg(Al)B2 nanorods which effectively impeded the dislocation movement and grain boundary sliding provided a significant contribution to the composite strength. (C) 2019 Elsevier B.V. All rights reserved.
KeywordB4C-Al composite In-situ reinforcement High-temperature strength Thermal stability TEM
Indexed BySCI
Language英语
WOS IDWOS:000500777900017
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80577
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zan, Y. N.,Zhang, Q.,Zhou, Y. T.,et al. Enhancing high-temperature strength of B4C-6061Al neutron absorber material by in-situ Mg(Al)B-2[J]. JOURNAL OF NUCLEAR MATERIALS,2019,526.
APA Zan, Y. N.,Zhang, Q.,Zhou, Y. T.,Wang, Q. Z.,Xiao, B. L.,&Ma, Z. Y..(2019).Enhancing high-temperature strength of B4C-6061Al neutron absorber material by in-situ Mg(Al)B-2.JOURNAL OF NUCLEAR MATERIALS,526.
MLA Zan, Y. N.,et al."Enhancing high-temperature strength of B4C-6061Al neutron absorber material by in-situ Mg(Al)B-2".JOURNAL OF NUCLEAR MATERIALS 526(2019).
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