Showing papers on "Spray forming published in 1982"
TL;DR: In this article, the use of traditional powder metallurgy and the newer forms of spray deposition over a range of applications is compared. And it is concluded that spray deposition is more suited to the production of some components and established PM methods preferable for others, the technologies are complementary rather than competitive.
Abstract: Comparisons are made between the use of traditional powder metallurgy and the newer forms of spray deposition over a range of applications. Overall, it is concluded that with spray deposition being more suited to the production of some components and established PM methods preferable for others, the technologies are complementary rather than competitive. PM/0265
21 citations
Patent•
24 May 1982
TL;DR: In this article, an improved spray booth is provided for use in forming high quality thin films by controlling the spray parameters related to film formation, and a spray nozzle design is selected which permits control of the spray footprint on a heated substrate.
Abstract: An improved spray booth is provided for use in forming high quality thin films by controlling the spray parameters related to film formation. A spray nozzle design is selected which permits control of the spray footprint on a heated substrate. A projected atomized liquid is formed to the selected spray configuration by directing spray cones of air toward the atomized liquid. Dwell time of the spray material adjacent the hot substrate is then controlled by controlling the velocity of airflow within the spray chamber and adjacent the substrate. To promote a gas phase reaction, a roof section is provided with reduced airflow wherein sufficient dwell time is provided for the vapor reaction to occur. Where a liquid phase reaction is provided, high velocity airflow is maintained to promptly remove reaction products and spray material which has not reached the surface after a selected time period. The spray booth is designed for frequent cleaning by providing separately removable sections where the frequency of cleaning may be varied as a function of the accumulated condensate. Thus, regions of the spray booth in contact with the sprayed solution may be removed without removing the entire spray booth. Particular uses employing the particular design principles include application of a film of SnO x which is highly transparent and electrically conductive and thin films of CdS suitable for use in forming large area photovoltaic panels.
10 citations
Patent•
06 Sep 1982
TL;DR: In this article, a mixture of water and a surface active agent is mixed with inorganic fiber such as rock wool, and a slurry in which minute bubbles are introduced is prepared by adding, if necessary, a thickner.
Abstract: PURPOSE:To obtain a light, coated formed productsuitable for various uses without generating dust by carrying prepared slurry of inorganic fiber and prepared slurry of a hydraulic inorganic binder separately, making them flow together in a nozzle part and spray forming. CONSTITUTION:A proper quantity of water and a surface active agent are mixed with inorganic fiber such as rock wool etc., and slurry in which minute bubbles are introduced is prepared by adding, if necessary, a thickner. On the other hand, slurry is prepared by adding water and, if necessary, a thickner to a hydraulic inorganic binder such as portland cement etc. The two kinds of slurry are carried by pumps through conduits separately, and made to flow together and mixed in the nozzle part for spray and spray forming is made using compressed air. By this method, coated formed products of bulk specific gravity <=0.4 suitable for fireproofing, heat insulation, sound absorption etc. can be obtained freely without generating dust at the time of spraying.
1 citations