球磨时间和退火温度对氧化物弥散强化合金粉末结构的影响

doi:10.11896/cldb.22030177

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Abstract To study the structural evolution of minor oxide in ODS steel, a high Y₂O₃ content powder was prepared by planetary ball milling and annealed at 400—1 200 ℃ for 1 h. The microstructure of the powders was observed with XRD, SEM and TEM. The results show that in the early stage of ball milling, the powder size was larger and the internal defects were more. When ball milling to 48 h, the powder size was less than 5 μm, the Fe grain size was refined to about 20 nm, Y₂O₃ was uniform distribution with the matrix and the Y₂Ti₂O₇ phase appeared during the ball milling process. During annealing, YTiO₃ and Y₂Ti₂O₇ phases precipitated at 600 ℃ and 1 000 ℃, respectively. With the increase of annealing temperature, the oxides gradually diffuse to the surface layer of the powders. When the annealing temperature exceeded 1 000 ℃, the number of Y-Ti-O phases in the powders reduced obviously. The microstructure analysis and conclusions on ODS powders can give some guidance to fabricate high performance structural materials for nuclear reactor.

Key words： oxide dispersion strengthened (ODS) milling time oxide annealing temperature

Published: 10 September 2023 Online: 2023-09-05

CLC number:

TF122

Fund:International Partnership Program of the Bureau of International Cooperation, Chinese Academy of Sciences (116134KYSB20200056).

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	Articles by authors
	ZHU Gaofan
	YANG Xinyi
	CAO Haibo
	HUANG Qunying

Cite this article:

ZHU Gaofan,YANG Xinyi,CAO Haibo, et al. Effect of Ball Milling Time and Annealing Temperature on the Structure of ODS Alloy Powders[J]. Materials Reports, 2023, 37(17): 22030177-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22030177 OR http://www.mater-rep.com/EN/Y2023/V37/I17/22030177

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