Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites
Fuel-rich composite powders combining elemental Si with the metal fluoride oxidizers BiF<sub>3</sub> and CoF<sub>2</sub> were prepared by arrested reactive milling. Reactivity of the composite powders was assessed using thermoanalytical measurements in both inert (Ar) and oxi...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/12/2367 |
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| author | Siva Kumar Valluri Mirko Schoenitz Edward Dreizin |
| author_facet | Siva Kumar Valluri Mirko Schoenitz Edward Dreizin |
| author_sort | Siva Kumar Valluri |
| collection | DOAJ |
| description | Fuel-rich composite powders combining elemental Si with the metal fluoride oxidizers BiF<sub>3</sub> and CoF<sub>2</sub> were prepared by arrested reactive milling. Reactivity of the composite powders was assessed using thermoanalytical measurements in both inert (Ar) and oxidizing (Ar/O<sub>2</sub>) environments. Powders were ignited using an electrically heated filament; particle combustion experiments were performed in room air using a CO<sub>2</sub> laser as an ignition source. Both composites showed accelerated oxidation of Si when heated in oxidizing environments and ignited readily using the heated filament. Elemental Si, used as a reference, did not exhibit appreciable oxidation when heated under the same conditions and could not be ignited using either a heated filament or laser. Lower-temperature Si fluoride formation and oxidation were observed for the composites with BiF<sub>3</sub>; respectively, the ignition temperature for these composite powders was also lower. Particle combustion experiments were successful with the Si/BiF<sub>3</sub> composite. The statistical distribution of the measured particle burn times was correlated with the measured particle size distribution to establish the effect of particle sizes on their burn times. The measured burn times were close to those measured for similar composites with Al and B serving as fuels. |
| first_indexed | 2024-03-10T14:29:29Z |
| format | Article |
| id | doaj.art-cb0d37f94d8d4759acd4beeb76a63904 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T14:29:29Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-cb0d37f94d8d4759acd4beeb76a639042023-11-20T22:42:46ZengMDPI AGNanomaterials2079-49912020-11-011012236710.3390/nano10122367Preparation and Characterization of Silicon-Metal Fluoride Reactive CompositesSiva Kumar Valluri0Mirko Schoenitz1Edward Dreizin2O.H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USAO.H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USAO.H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USAFuel-rich composite powders combining elemental Si with the metal fluoride oxidizers BiF<sub>3</sub> and CoF<sub>2</sub> were prepared by arrested reactive milling. Reactivity of the composite powders was assessed using thermoanalytical measurements in both inert (Ar) and oxidizing (Ar/O<sub>2</sub>) environments. Powders were ignited using an electrically heated filament; particle combustion experiments were performed in room air using a CO<sub>2</sub> laser as an ignition source. Both composites showed accelerated oxidation of Si when heated in oxidizing environments and ignited readily using the heated filament. Elemental Si, used as a reference, did not exhibit appreciable oxidation when heated under the same conditions and could not be ignited using either a heated filament or laser. Lower-temperature Si fluoride formation and oxidation were observed for the composites with BiF<sub>3</sub>; respectively, the ignition temperature for these composite powders was also lower. Particle combustion experiments were successful with the Si/BiF<sub>3</sub> composite. The statistical distribution of the measured particle burn times was correlated with the measured particle size distribution to establish the effect of particle sizes on their burn times. The measured burn times were close to those measured for similar composites with Al and B serving as fuels.https://www.mdpi.com/2079-4991/10/12/2367reactive materialsnanocompositemetal combustionignitionthermal analysis |
| spellingShingle | Siva Kumar Valluri Mirko Schoenitz Edward Dreizin Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites Nanomaterials reactive materials nanocomposite metal combustion ignition thermal analysis |
| title | Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites |
| title_full | Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites |
| title_fullStr | Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites |
| title_full_unstemmed | Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites |
| title_short | Preparation and Characterization of Silicon-Metal Fluoride Reactive Composites |
| title_sort | preparation and characterization of silicon metal fluoride reactive composites |
| topic | reactive materials nanocomposite metal combustion ignition thermal analysis |
| url | https://www.mdpi.com/2079-4991/10/12/2367 |
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