4. Conclusions. Tantalum nitride films were deposited on ceramic substrates (pre-sputtered with underlayer and 100-nm-thick aluminum oxide) by DC reactive magnetron sputtering using a Ta target under a typical base pressure of 10 â7 Torr.
Earth's atmosphere is a thin blanket of gases and tiny particlesâtogether called air. Without air, the Earth would just be another lifeless rock orbiting the Sun. Although we are rarely aware of it, air surrounds us. We are most aware of air when it moves, creating wind.
The Atmosphere. The atmosphere, as we know it, is a protective layer of gases that envelop the Earth. It consists of a number of gases, including nitrogen (78%), oxygen (21%), argon (0.93%) and traces of carbon dioxide, hydrogen, helium and other noble gases.