About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
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Presentation Title |
In-situ Investigation of Tension-compression Anisotropic Behaviour of Ni-SiOC Nanocomposites |
Author(s) |
Bingqiang Wei, Wenqian Wu, Jian Wang |
On-Site Speaker (Planned) |
Bingqiang Wei |
Abstract Scope |
Through co-sputtering Ni and Si-O-C, we synthesized Ni-SiOC nanocomposites with two characteristic microstructures: core (crystalline Ni)-shell (amorphous SiOC) nanostructures and nanograined Ni containing amorphous ceramic SiOC nanoparticles which developed during annealing the co-sputtered Ni-SiOC nanocomposites up to 800 oC. In-situ SEM compression tests show that both Ni-SiOC nanocomposites exhibit high plastic flow stability, which was attributed to microstructure-promoted plastic co-deformation between amorphous ceramics and Ni grains. However, limited plasticity was observed during their tension test. The core-shell nanostructures present brittle behaviour due to cracking along grain boundaries. The nanograined structure exhibits a limited tension plasticity and interface decohesion due to obvious deformation incompatibility between soft Ni and hard SiOC ceramic. |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Characterization, Mechanical Properties |