Tungsten substrate

Fig. 5.2y, Surface of boron fiber on tungsten substrate showing a corn-cob" structure with noilulcs.

Nanoporous T102 and WO3 films by anodization of titanium and tungsten substrates Influence of process variables on morphology and photoelectrochemical response. J Phys Chem B 110 25347-25355... 

Factor analysis applied to the spectra in the integrated mode shows three tungsten and carbon components one at the surface, one in the film and one in the substrate (Figure 26.4(b,c)). The third component found for carbon is ascribed to a spurious background signal since no carbon is detected in the tungsten substrate by AES. 

The reactor assembly is slightly different from that used to produce boron on a tungsten substrate, as pyrolytic carbon is applied online. 

The object of this study was the deposition of a coating of boron on a tungsten substrate in a corona discharge, determination of certain critical parameters, and determination of the mechanism and characteristics of this technique for coating the substrate material. 

Effect of Morphology of the Substrate. The 0.5-mil tungsten substrate wire has been examined after various stages in the process. 

Deposition on 0.15-mil Tungsten Wire. The 0.15-mil tungsten substrate wire was cleaned by the hot-wire technique at hydrogen flow rate of 140 cc./min. and at a d.c. power input of 208 volts and 90 milliamperes. While the input vapors were split between the three plating cells, only one cell was utilized for plating studies. 

Fig. 27.14 Schematic representation of the assembly used for the manufacture of boron fibres by CVD using a tungsten substrate.

For the spin resolving photoemission and spin polarized metastable de-excitation spectroscopy measurements the films were magnetized by a current pulse through a coil close to the sample along the [110] direction of the tungsten substrate. 

Fig. 4.11 Constant-current topograph (t/ = —0.3 V, / = 0.03 nA) of Gd islands on W(llO). Between high Gd islands with a (0001) surface, a Gd monolayer covers the tungsten substrate. Additionally, two and three monolayer high islands are visible, a To this system, 0.2 L hydrogen was dosed, b The same area as in (a) but with an additional dosage of 0.8 L resulting in a total amount of 1.0 L hydrogen. Reprinted with permission liom [3]. Copyright (1999) by the American Physical Society...

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