Enhanced mechanical properties and interface structure characterization of W-La2O3 alloy designed by an innovative combustion-based approach

Pengqi Chen; Xian XU; Bangzheng Wei; Jiayu Chen; Yongqiang Qin; Jigui Cheng

doi:https://doi.org/10.1016/j.net.2020.11.002

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자료유형: 학술저널

저자정보: Pengqi Chen (School of Materials Science and Engineering, Hefei University of Technology) Xian XU (School of Materials Science and Engineering, Hefei University of Technology) Bangzheng Wei (School of Materials Science and Engineering, Hefei University of Technology) Jiayu Chen (AECC Commercial Aircraft Engine Co, LTD. Shanghai, 200241, China) Yongqiang Qin (Research Centre for Powder Metallurgy Engineering and Technology of Anhui Province) Jigui Cheng (School of Materials Science and Engineering, Hefei University of Technology)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제53권 제5호

발행연도: 2021.5

수록면: 1,593 - 1,601 (9page)

DOI: https://doi.org/10.1016/j.net.2020.11.002

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Oxide dispersion strengthening (ODS) tungsten alloys are highly desirable in irradiation applications. However, how to improve the properties of ODS-tungsten alloys efficiently has been worth studying for along time. Here we report a nanostructuring approach that achieves WeLa2O3 alloy with a high level offlexural strength and Vickers hardness at room temperature, which have the maximumvalue of 581 MPaand 703 Hv, respectively. This method named solution combustion synthesis (SCS) can generate 30 nmcoating structures WeLa2O3 composite powders by using Keggin-type structural polyoxometalates asraw materials in a fast and low-cost process. The composite powder can be fabricated to WeLa2O3 alloywith an optimal microstructure of submicrometric W grains coexisting with nanometric oxide particlesin the grain interior, and a stability interface structure of grain boundaries (GBs) by forming transitionzones. The method can be used to prepare new ODS alloys with excellent properties in the future.

#Tungsten alloy #ODS #Combustion synthesis #Interface structure #Transition zones #Mechanical properties

참고문헌 (33)

참고문헌 신청

Xiao-Yu Ding / 2020 / Microstructure evolution and effect on deuterium retention in oxide dispersion strengthened tungsten during He+ irradiation / Nuclear Engineering and Technology 52(12):2860~2866

M. Xia / 2013 / Bulk tungsten with uniformly dispersed La2O3 nanoparticles sintered from co-precipitated La2O3/W nanoparticles / J. Nucl. Mater 434:85~89

A. Sestan / 2018 / The role of tungsten phases formation during tungsten metal powder consolidation by FAST : implications for high-temperature applications / Mater. Char 138:308~314

Z. M. Xie / 2015 / Extraordinary high ductility/strength of the interface designed bulk W-ZrC alloy plate at relatively low temperature / Sci. Rep 5:16014

H. Kurishita / 2013 / Development of nanostructured tungsten based materials resistant to recrystallization and/or radiation induced embrittlement / Mater. Trans 54:456~465

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