Grain coat fiber

As the formation of the niobium amido complex was deemed unavoidable at atmospheric pressure, attempts were made to synthesize fine-grained coatings of NbCl3(NH2)2 on carbon fibers in the first step and then to convert the film into the desired NbCi yNy layers by subsequent heat treatment in a methane/ammonia atmosphere, (i.e., approach (ii)) (Eq. 2.6) [69]. Although fine-grained deposits were... 

Hermeticity of composites is an important issue for first wall and blanket structure applications that require a pressure boundary and/or gas or fluid containment. It is widely considered to be a weakness of common SiC composites that they are not fully dense, for the matrix micro-cracks, existing more or less in the as-fabricated CVI, PIP or Ml SiC/SiC. That may easily cause unacceptable He leaks A hermetic seal coating likely will be required for such applications Exactly, it is both for hermeticity considerations and for corrosion protection of the fine-grained SiC fibers and of the fiber/matrix interphase material... 

Coatings and Surface Modifications. Probably the one application of photopolymer chemistry that has the most worldwide commercial value in terms of product sales is the use of photopolymer materials for curable coatings. Most of the wood paneling and less expensive furniture manufactured today utilize UV or electron-beam curable materials for decorative finishes (e.g. simulation of wood grain) and protective coatings. In addition, the surfaces of many commercially important materials (e.g. textile fibers and polyester films) are being modified by photopolymer processes. 

Coated abrasives consist of a flexible backing on which films of adhesive hold a coating of abrasive grains. The backing may be paper, cloth, open-mesh cloth, vulcanized fiber (a specially treated cotton rag base paper), or any combination of these materials. The abrasives most generally used are fused aluminum oxide, sol-gel alumina, alnmina-zirconia. silicon carbide, garnet, emeiy, and flint. 

In a similar way, a well-adhered surface modification of BC fibers can be achieved with Ti(>2 nanoparticles (with a diameter of about 10 nm) by the hydrolysis of titanium tetraisopropanolate adsorbed onto the fibers. It was observed that the titania-coated surface appears to be dense and have low porosity and to consist of near-spherical grains. By washing with sodium carbonate solution, the TiC>2 films were not removed during neutralization. It seems that the particles have formed strong interactions with BC. The coated membranes showed substantial bactericidal properties under UV radiation and white light (containing a small fraction of UV) conditions, too. This effect is caused by the photocatalytic destruction of the bacterial cells. 

Untreated corn fiber is flaky with residual germ, corn grains, and a waxy coating. Native corn fiber is rather resistant to biological degradation. In order to... 

For coating a CFC (carbon fiber reinforced carbon matrix) workpiece via CVD, the monomer TABB has been used as the volatile precursor [105]. The layers one obtains are dense and do not exhibit any grain boundaries. Furthermore, large pores in the substrate surface (>1 pm) are filled. 

The removal of the hull from paddy by dehusking exposes brown rice to the environment. Brown rice comprises four distinct outer layers, that is, nucellus, seed coat, pericarp, and aleurone. These layers are the part of bran of rice grain, along with the germ. The bran portion accounts for 5%-8% by weight of brown rice. The bran is the most nutritious part of the brown rice for it contains protein, fat, carbohydrate, and dietary fiber. In addition, the bran contains vitamins and minerals in quantities beneficial to humans. 

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