Selected abstracts of thermal spray literature
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Application Automotive Industry The Applications of Wear-Resisting end Hot-Reelstlng Spraying and Hardfacing for Automobiles. The spraying and hardfacing can overcome the limit of traditional materials by different functional designs. Automobile pistons processed with spraying spinel materials by arc and plasma are described. The inside walls of engine block and cylinders are sprayed with inner gun. The thermal barrier coatings on piston head can reduce the emissions from automobiles. The face and top of the exhaust valves are sprayed with stellite by oxyfuel and plasma transfer arc process. Molybdenum and aluminum coatings are also discussed. C.S. Wu. Cited: MeL Ind. (China), Vol 30 (No. 2), March 1996, p 45-47 [in Chinese]. ISSN 0977-0379. PHOTOCOPY ORDER NUMBER: 199702-570282.
Boiling Heat Transfer Boiling Heat Transfer on Thermal Spray Coating Surface in HighTemperature Generator of Absorption Chiller/Heater. Improvement of heat transfer performance on the rear furnace wall of a high-temperature generator of an absorption chiller/heater was investigated. Heat transfer coefficients on a plain surface and a thermal spray coating surface were measured and compared. These two surfaces were located symmetrically with a vertical centerline of the wall. Surface wall temperatures of both the combustion gas and liquid sides were measured at three vertical positions of each heated surface, then the heat flux and the heat transfer coefficient were calculated. Nickel-chromium alloy and alumina were employed as spray coating materials. The experimental results reveal that the Ni-Cr spray coating surface can yield a remarkable improvement in heat transfer performance. Therefore, the thermal spray coating treatment is greatly effective to reduce the heated surface temperature for an anticorrosive countermeasure. M. Kaji, M. Furukawa, K. Sekoguchi, and E. Enomoto. Cited: Technol. Rep. Osaka Univ., Vol 45, (No. 2217-2232), 15 Oct 1995, p 191-200 [in English]. ISSN 0030-6177. PHOTOCOPY ORDER NUMBER: 199701-32-0007.
Corrosion and Erosion High-Velocity Continuous Combustion (HVCC) Spraying System for "On-Site" Spraying of Metals and Carbides, Solving Corrosion or Corrosion/Erosion-Related Failure Mechanisms. The new high-velocity continuous combustion (HVCC) thermal spraying system has been developed to address industries on-site corrosion and corrosion/erosion-related problems. This system is capable of spraying metals and carbides to a density of better than 99%. Being portable, it is suitable for coating large surface areas of nonmovable plant equipment. Furthermore, with a deposition rate of up to 9 kg/h, thick coatings can be sprayed with reasonableease. The HVCC system is unique in that it is capable of spraying wire and powder consumables, through a continuous combusting supersonic flame. The spray gun is air cooled to minimize maintenance and operating difficulties during on-site spraying. The versatility of the equipment design allows simple spray parameter adjustments to be made to vary the coating properties. In this
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