Cadmium telluride (CdTe) is a promising material for use as high power laser windows. In the fabrication processes used prior to this work difficulties were experienced in controlling the structural perfection and purity of the material. The chemical vapor deposition process offers the promise of overcoming some of the difficulties experienced to date. The first phase involved the investigation of several processes for the CVD of CdTe. The specific processes ...
A variety of ceramic composite components have been fabricated by a combination of chemical vapor infiltration (CVI) and chemical vapor deposition (CVD) of silicon carbide. Continuous Nextel and Nicalon ceramic fibers, which were woven into cloth, where the substrate. Both flat and corrugated panels as well as baskets and tubes have been made. By varying the weave architecture and regulating the deposition time, the porosity could be changed from open ...
In this work, we explore the use of the chemical vapor composites (CVC) process to increase the rates of silicon carbide (SiC) growth on graphite substrates. Large SiC seed particles are used that are deposited by gravity- driven sedimentation. The results show that addition of large (d(p) = 28 microns) SiC seed particles to a gas phase containing hydrogen and methyltrichlorosilane increases the deposition rate of SiC by amounts substantially ...
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