About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
High Strength and Low Coercivity Cobalt with Three-dimensional Planar Defects Introduced by Heterogeneous Coherent Interface |
Author(s) |
Jian Song, Guisen Liu, Y. Liu, J. Wang, X. Zhang |
On-Site Speaker (Planned) |
Jian Song |
Abstract Scope |
High strength and wear resistance are essential for the reliability of cobalt in magnetic data storage and other information media applications. However, increasing the strength of cobalt by numerous methods, such as grain refinement, is typically accompanied by increasing of coercivity and magnetic anisotropy. Here, we demonstrated a new strategy that can accomplish high strength without sacrificing magnetic property of cobalt by introducing heterogeneous copper/cobalt coherent interface. Microstructural analysis revealed that the local strains originated from the heterogeneous interface could introduce high density three-dimensional stacking fault intersecting networks (SFINs) into cobalt. These networks can stabilize the metastable face-centered cubic cobalt at room temperature, and leading to lower coercivity and higher mechanical strength. Moreover, we found that tailoring the density of SFINs is an effective approach to optimize such properties. This work may provide a new strategy for integrated performance optimization by interface design and strain engineering. |
Proceedings Inclusion? |
Planned: |