Formation mechanism of coronal composite secondary phase in titanium-zirconium-molybdenum alloy

Shi Lei Li, Ping Hu, Tong Liu, Qian Shuang Shi, Xiao Ming Dang, Bo liang Hu, Wen Zhang, Kuai She Wang

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

The coronal composite secondary phase has a high mismatch tolerance with the molybdenum matrix. TiO2 particles located within the coronal structure that provide a semi-coherent interface with a mismatch degree of 8.70%, and ZrO2 particles located outside the coronal structure that provide an incoherent interface with a mismatch degree as high as 41.61%. The ZrO2 particles of the coronal composite secondary phase are partially attached to the TiO2 in a coronal structure, which endows the ZrO2 with the molybdenum matrix's higher interfacial bonding force. Titanium sulfate and zirconium nitrate are realized the mixing of Ti/Zr, TiO2/ZrO2 molecules at atomic levels. Compared with Ti, Zr is more easily combined with oxygen, which leads to Zr in Ti/Zr solid solution being attracted by oxygen at high temperature to form ZrO2. The small addition of zirconium element lacks nucleation particles to form of ZrO2, so ZrO2 can only adhere to more TiO2 particles and nucleate, forming the second phase of the coronal composite structure. This study can guide the design of high-performance secondary phase strengthening alloys.

源语言英语
文章编号112235
期刊Materials Characterization
193
DOI
出版状态已出版 - 11月 2022
已对外发布

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