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E.R. Sampson
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Proceedings Papers
ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 717-719, May 8–11, 2000,
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Arc spray systems are increasingly used in the overhaul of aircraft engine components and auxiliary power units. The increasing use of arc spray over plasma for metallic coatings has created a demand for new wire approvals. The chemistry is already established as a powder and it is a matter of conversion to a wire and the arc spray process. The increasing popularity of the arc spray process is due to its superior bond strength and microstructure that exceed those of plasma. In one case, there is a two and one-half percent porosity requirement for the arc spray and up to 15% is allowed for plasma. This density approaches HVOF quality requirements. This paper will discuss some historical background of the process, what is approved and then move on to the new materials that are submitted for approval. Microstructures and bond strengths will be presented and some information about a proprietary method to solve a coating problem in the aircraft overhaul industry of long standing. The paper will also discuss new advances in arc spray systems and materials, which makes these systems amenable to replacing plasma sprayed coatings.
Proceedings Papers
ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1145-1148, May 8–11, 2000,
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Naval ship components are subject to extreme operating conditions while at sea, either during regular sailing periods and/or during training exercises. The Chilean Navy has employed thermal spray technology since the early 1960 decade. By setting up a joint cooperative program between the Chilean Navy industry and suppliers, it has been possible to start regaining confidence in thermal spraying and positioning the same as a "must" technology in regular naval maintenance work. This article presents a description of the Naval Components Reclamation Program and discusses the processes involved in hard chrome plating replacement in naval components. It provides a review of characteristic thermal spray applications developed by the Joint Naval Components Reclamation Program.
Proceedings Papers
ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1309-1312, May 8–11, 2000,
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MIL-STD-1687 (SH) has been in use for many years as one of the specifications that the United States Military performs thermal spray operations at overhaul facilities. The U.S. NAVY has asked AWS (American Welding Society) to develop an ANSI/AWS national standard to replace it and then provide long range maintenance of the new specification when necessary. This paper discusses both the procedure used to develop this standard and the content of the specification. Particular attention will be paid to the quality controls, training of operators and use of other specifications to accomplish compliance with this specification. The approval process for this document will be discussed with a probable time line including a plan to publicize and smoothly replace the MIL-STD-1687 (SH) specification. The further integration and use of it globally will be discussed and recommendations presented. The new standard will be in harmony with the ISO thermal spray standards program.
Proceedings Papers
ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 133-137, May 25–29, 1998,
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The use of cored wires for thermal spraying is a relatively new development that is being rapidly utilized for arc spray in a wide variety of applications. This paper will discuss the existing applications and industries in which cored wire coatings are used. Additionally, this presentation will cover the effect cored wires have had on the use of other types of thermal spray equipment. The paper will close with a trend analysis that discusses the applications of the future.