| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Undergraduate Student Poster Contest
|
| Presentation Title |
SPU-11: Chromium as a Catalyst for Large Particle Silicon Nitride |
| Author(s) |
Hannah Scott, Trevor Aguirre |
| On-Site Speaker (Planned) |
Hannah Scott |
| Abstract Scope |
This study investigated chromium as a silicon nitriding catalyst. Taguchi’s Design of Experiments was used to systematically investigate the effects of time, temperature, N2-4%H2 flow rate, and chromium concentration on synthesizing reaction-bonded silicon nitride. The chromium-silicon powder was prepared by dissolving chromium powder into hydrochloric acid and then precipitating hydrated chromium chloride onto the silicon powder. This mixture was dried, crushed, pressed, and nitrided according to the design of experiments. It was determined that the 7.5 and 10 wt.% chromium concentration powders displayed hygroscopic behavior creating inconsistencies in the mass-based Extent of Nitriding (EN). This caused error for two reasons. The initial and theoretical mass does not account for absorbed water thus introducing error into the mass-based EN. Thus, the EN was compared between the mass-based equation and x-ray diffraction to provide insight on the optimization of synthesizing silicon nitride via direct nitriding of large particle silicon. |