| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Sub-surface Observations and Analysis of Indented Polycrystalline Hot-pressed Boron Suboxide (B6O) |
| Author(s) |
Kristopher Behler, Jerry C. LaSalvia, C.J. Marvel, S.D. Walck, M.P. Harmer |
| On-Site Speaker (Planned) |
Kristopher Behler |
| Abstract Scope |
Amorhpization, microcracking and macrocracking have previously been shown in commercially hot-pressed polycrystalline boron carbide (B4C) using Raman spectroscopy combined with mechanical polishing of Knoop and Vickers indents as well as subsurface preparation techniques to observe the microstructure within the inelastically deformed regions. In this current study, polished hot-pressed polycrystalline boron suboxide (B6O) with and without sintering aids (rare earth oxide and/or silica) were indented using Knoop indentation with loads of 0.3 kgf to 2 kgf. The surface of the indents are characterized using Raman spectroscopy. A FIB liftout technique was used to prepare cross-sections of the area under the indent for aberration corrected scanning transmission electron microscopy (AC-STEM), AC-STEM/EDS (x-ray energy dispersive spectroscopy) and transmission electron microscopy (TEM) characterization and analysis. Experimental procedures and the effect of silica and rare earth/silica sintering aids on the microstructure and amorphization are reported. |
| Proceedings Inclusion? |
Undecided |