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

Nuclear Engineering and Technology (May 2021)

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

Affiliations

Pengqi Chen: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; National–Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei, 230009, China; Corresponding author. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China.
Xian Xu: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China
Bangzheng Wei: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China
Jiayu Chen: AECC Commercial Aircraft Engine Co, LTD. Shanghai, 200241, China
Yongqiang Qin: Research Centre for Powder Metallurgy Engineering and Technology of Anhui Province, Hefei, 230009, China
Jigui Cheng: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Research Centre for Powder Metallurgy Engineering and Technology of Anhui Province, Hefei, 230009, China; Corresponding author. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China.

Journal volume & issue: Vol. 53, no. 5
pp. 1593 – 1601

Abstract

Read online

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 a long time. Here we report a nanostructuring approach that achieves W–La2O3 alloy with a high level of flexural strength and Vickers hardness at room temperature, which have the maximum value of 581 MPa and 703 Hv, respectively. This method named solution combustion synthesis (SCS) can generate 30 nm coating structures W–La2O3 composite powders by using Keggin-type structural polyoxometalates as raw materials in a fast and low-cost process. The composite powder can be fabricated to W–La2O3 alloy with an optimal microstructure of submicrometric W grains coexisting with nanometric oxide particles in the grain interior, and a stability interface structure of grain boundaries (GBs) by forming transition zones. The method can be used to prepare new ODS alloys with excellent properties in the future.

Published in Nuclear Engineering and Technology

ISSN: 1738-5733 (Print)
Publisher: Elsevier
Country of publisher: Korea, Republic of
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-engineering-and-technology

About the journal

Abstract

Keywords