About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Materials Under Extreme Environment
|
| Presentation Title |
The effects of dynamic shock compression of REE-doped Cryptomelane (K-OMS-2) |
| Author(s) |
Morgan Gillis, Jack Gugino, Mithun Bhowmick, Mark Krekeler |
| On-Site Speaker (Planned) |
Morgan Gillis |
| Abstract Scope |
Cryptomelane (K-OMS-2) (K(Mn4+, Mn2+)8O16) is a common mineral that appears in various geologic environments such as soils and desert rock varnish. K-OMS-2 has historically been studied as a catalyst for environmental remediation, but has recently gained interest in the materials science realm for its interesting properties and structural resistance to dynamic shock compression (DSC). Cryptomelane was modified at varying percentages of Ce+ and Eu+ to determine if increasing density and surface area enhance the resistance to DSC. The materials were characterized extensively before and after DSC using transmission electron microscopy, powder X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. Laser-driven DSC was performed for each experiment using Al flyer plates to shock the minerals with ~36.8 GPa. Preliminary TEM results show increased structural integrity when K-OMS-2 is modified with REEs. |