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Full-Text Articles in Engineering Science and Materials
Characterization And Cytotoxic Assessment Of Ballistic Aerosolized Particulates For Tungsten Alloy Penetrators Interacting With Steel Targets, Brenda Ivette Machado
Characterization And Cytotoxic Assessment Of Ballistic Aerosolized Particulates For Tungsten Alloy Penetrators Interacting With Steel Targets, Brenda Ivette Machado
Open Access Theses & Dissertations
The aerosolized particulates produced during an impact of depleted uranium munitions can potentially contaminate extensive areas around the impact sites and cause a wide spectrum of civilian and military damage. Thus materials such as WHA have been prompted for consideration. The present research is concerned with the regular collection of aerosol particulates associated with ballistic WHA rod penetration into rolled homogeneous steel (RHA) or other related steel armor as armor plate sequences. Particulate size characterization via scanning electron microscopy (SEM) and transmission electron microscopy (TEM) along with chemical compositions via energy dispersive spectroscopy (EDS) were the focus of this research. …
Surface Structure Changes In Cement Paste Exposed To 10.6 Um Laser Radiation, Juan José Soto-Bernal, María Del Rosario Moreno-Virgen, Claudio Frausto-Reyes, Adrian Bonilla-Petriciolet, José Vega-Duran, José Pineda-Piñon, José Ortíz-Lozano
Surface Structure Changes In Cement Paste Exposed To 10.6 Um Laser Radiation, Juan José Soto-Bernal, María Del Rosario Moreno-Virgen, Claudio Frausto-Reyes, Adrian Bonilla-Petriciolet, José Vega-Duran, José Pineda-Piñon, José Ortíz-Lozano
Adrian Bonilla-Petriciolet
We report the changes occurring in cement pastes irradiated by 10.6um CO2 laser at different stages of hydration. Raman spectroscopy, X-rays and Scanning Electronic Microscopy (SEM) techniques had been used to observe molecular structural changes. Intensity of cement paste Raman peaks after laser irradiation was monitored in samples irradiated 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 days after their preparation. Applied laser power changed Raman peaks intensity at 187.5cm-1, 563cm-1, 695cm-1, 750cm-1, 897cm-1, 1042cm-1 and 1159cm-1 that corresponds to compounds already presents in cement pastes. X ray diffraction and SEM images confirm the recrystalization of cement …