Controlling Thermophoresis in the Exothermic Nitridation of an Aluminum Aerosol |
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| Authors: | Alan W. Weimer Gene A. Cochran Glenn A. Eisman John P. Henley Theresa A. Guiton Arne K. Knudsen |
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| Affiliation: | 1. Ceramics and Advanced Materials Research , 52 Building, Dow Chemical U.S.A., Midland, MI, 48667;2. Advanced Ceramics Laboratory , The Dow Chemical Company , 1776 Building, Midland, MI, 48674 |
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| Abstract: | Thermophoretic deposition in an exothermic aluminum (AI) nitridation aerosol process was redirected from the reactor wall to a flowing inert powder when the inert powder was admixed with the feed atomized AI. The inert powder can be a compatible (aluminum nitride) or removable (carbon) powder, which provides for a lower-temperature surface to be in close proximity to the exothermic reaction sites. Aluminum nitride manufactured by this process was pressurelessly sintered with 3 wt% Y2O3 to fabricate dense AIN parts exhibiting high thermal conductivity (141 W/m – K). |
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