Microstructure of Zr Alloy Containing Nb or Cu Element

作者：Li Qiang^*; Xu Long; Yang Yanping; Liang Xue; Peng Jianchao; Yao Meiyi; Zhou Bangxin

来源：Rare Metal Materials and Engineering, 2016, 45(6): 1526-1530.

• zirconium alloys
• Nb
• Cu
• microstructure

The effect of Nb and Cu on the microstructure of Zr alloys was investigated by TEM and SEM. Results show that when a trace amount of Fe element is presented, the precipitation of Nb and Fe, whose amount is below the equilibrium solid solution limitation in alpha-Zr, are promoted by adding the appropriate amount of Cu element, leading to the lower content of Nb in alpha-Zr alloys. However, the precipitation of Nb-enriched phase is inhibited by the further addition of Cu amount since the Fe element is consumed by the enrichment of Zr2Cu phase. Meanwhile, Zr2Cu phase in Zr-1.0Cu alloy is significantly refined and uniformly distributed after the addition of Nb element. In the presence of beta-Zr secondary phase stabilized by a large amount of Nb element, a small amount of Cu element is enriched within the beta-Zr phase rather than being precipitated as Zr2Cu.

• 出版日期2016-6
• 单位上海大学