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Hard carbon coatings

Magnetic hard discs are used in computers to store information in the form of magnetic bits on a ferromagnetic alloy film. To protect the magnetic medium, a hard carbon coating about... [Pg.265]

Some examples of commercial products are MPG and ICG by Mitsubishi Chemical Co., GDA by Mitsui Mining Co., OMAC by Osaka Gas Chemical Co., 818 by BTR Energy Materials Co., NG-7 by Kansai Thermochemical Co., and DAG by Sodiff.656 Hard carbon coated cokes and soft carbon coated hard carbons are other carbons with core-shell structure reported in the literature.610-657... [Pg.303]

Figure 3.2 SEM images of hard carbon coatings as a function of the composition of the feed gas. Each of the images shows the surface of the coating resulting from a feed gas composition consisting of (a) 0.1 %, (fa) 0.5%, (c) 1.0%, (d) 1.5%, and (e) 2.0% methane by volume in hydrogen. ... Figure 3.2 SEM images of hard carbon coatings as a function of the composition of the feed gas. Each of the images shows the surface of the coating resulting from a feed gas composition consisting of (a) 0.1 %, (fa) 0.5%, (c) 1.0%, (d) 1.5%, and (e) 2.0% methane by volume in hydrogen. ...
Figure 3.3 Hydrogen/carbon atom ratio in hard carbon coatings as a function of depth into the film, as measured by elastic recoil detection. The different curves are for different film samples. ... Figure 3.3 Hydrogen/carbon atom ratio in hard carbon coatings as a function of depth into the film, as measured by elastic recoil detection. The different curves are for different film samples. ...
Sundararajan, S., and Bhushan, B., Micro/Nanotribology of Ultra-thin Hard Amorphous Carbon Coatings Using Atomic Force/Friction Force Microscopy," Wear, Vol. 225-229, 1999, pp. 678-689. [Pg.209]

Bhushan, B., Chemical, Mechanical and Tribological Characterization of Ultra-Thin and Hard Amorphous Carbon Coatings as thin as 3.5 nm Recent Developments," Diamond Relat. Mater., Vol. 8,1999,pp. 1985-2015. [Pg.209]

Yoshio, M., Wang, H., Fukuda, Abe, T., and Ogumi, Z., Soft carbon-coated hard carbon beads as a lithium-ion battery anode material, Chemistry Letters (2003) Vol. 32, No. 12, 1130-1131. [Pg.386]

The hardness deposits coat the inside of the boiler s tubes, interfere with heat transfer, and overheat the tubes. The carbon dioxide, which is also generated from the dissolved solids, creates more serious corrosion problems in downstream heat exchangers. When the steam condenses, the carbon dioxide may remain trapped in the reboiler or preheater as a noncondensable gas. Actually, there is no such thing as a noncondensable gas. Even C02 is somewhat soluble in water. As the C02 dissolves in the condensed steam, it forms carbonic acid, a relatively weak acid (pH typically between 5 and 6). Strong acids will have pH values of 1 to 2. Pure water has a pH of seven. Carbonic acid is particularly corrosive to carbon steel heat-exchanger tubes. [Pg.175]

Hard Carbon Graphitized Mesocarbon Coated Natural Synthetic Graphite... [Pg.300]

FIGURE 7.19 Scanning electron microscope pictures of a pitch-based hard carbon (a), graphitized MCMB 25-28 (courtesy of Osaka Gas Chemical Co.) (b), coated natural graphite (c), and synthetic graphite (d). [Pg.301]


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See also in sourсe #XX -- [ Pg.46 , Pg.47 , Pg.53 ]




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