Preparation and characterization of beryllium doped organic plasma polymer coatings

Abstract

We report the formation of beryllium doped plasma polymerized coatings derived from a helical resonator deposition apparatus, using diethylberyllium as the organometallic source. These coatings had an appearance not unlike plain plasma polymer and were relatively stable to ambient exposure. The coatings were characterized by inductively coupled plasma mass spectrometry and x-ray photoelectron spectroscopy (XPS). Coating rates approaching 0.7 μm h−1 were obtained with a beryllium-to-carbon ratio of 1:1.3. There is also a significant oxygen presence in the coating as well which is attributed to oxidation upon exposure of the coating to air. The XPS data show only one peak for beryllium with the preponderance of the XPS data suggesting that the beryllium exists as BeO. Diethylberyllium was found to be inadequate as a source for beryllium doped plasma polymer, due to thermal decomposition and low vapor recovery rates.

Influence of CH4–Ar ratios on the composition, microstructure and optical properties of Be2C films synthesized by DC reactive magnetron sputtering

“…Further increasing the CH 4 -Ar ratio resulted in a dramatic decrease of the beryllium content and increase of the carbon content, until pure hydrocarbon lms were formed. The results, however, were not consistent with previous research, 20 where the Be-C ratios reached 3.5 when the CH 4 -Ar ratio was 25% and was maintained at $1 even when the CH 4 -Ar ratio exceeded 50%. However, the variation trend of the beryllium and carbon content with the CH 4 -Ar ratios in our work was the same as in the previous research.…”

“…[6][7][8][9][10][11] Currently, the compound Be 2 C has caught researchers' interest because it combines the advantages of beryllium and hydrocarbons. 12,13 Compared with many hydrocarbons, Be 2 C has a lower atomic number (Z ¼ 4.7), and a higher density (r ¼ 2.4 g cm À3 ) and mechanical strength (bulk modulus B 0 ¼ 217.05 GPa and shear modulus C s ¼ 165.95 GPa). 2,3,14 Compared with beryllium, its antiuorite structure results in a smoother surface and grain renement.…”

An investigation progress toward Be-based ablator materials for the inertial confinement fusion

“…As for another Be-based material, Be 2 C ablator, is considered as an excellent potential target ablator because it combines the advantages of both hydrocarbon and Be, and achieves a more balanced ablation performance [16,17] . It owns the lower atomic number (Z = 4.7), and the higher density (ρ = 2.4 g/cm 3 ) and mechanical strength than many hydrocarbons [18,19] .…”