| Graded Coatings for Light Gas Gun Flyer Plate Applications | ||
| Dr. Aaron C. Hall1, Dr. Rodney L. Williamson1, Clint Hall2, Dr. Christopher M. Weyant1, Mr. Timothy J. Roemer3, John W. Cates1, Mr. David A. Urrea1, Andrew J. Mayer3, Dr. Diedre A. Hirschfeld4, David E. Beatty3 and James F. McCloskey1, 1Joining and Coating Department, Sandia National Laboratories, P.O. Box 5800, MS 1130, Albuquerque, NM 87123-1130, 2Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87123, 3Ketch Corporation, 1300 Eubank Blvd. S.E., Albuquerque, NM 87123-3336, 4Materials and Metallurgical Engineering, New Mexico Institue of Mining and Technology, 801 Leroy Place, Socorro, NM 87801
Use of graded coatings is a well-known strategy for creating a material with continuously changing physical properties. The stiffness (modulus of elasticity) of flyer plates used in light gas gun testing directly influences the shape of the shock wave produced by the light gas gun. Many strategies exist for creating flyer plates that produce variable shock profiles, including stacked foils and powder compaction. We have investigated graded thermal spray coatings as an alternative method for creating flyer plates that produce variable shock profiles. An initial proof of concept demonstration has been completed by air plasma spraying a graded coating of Cu & Al onto a copper substrate and using that composite as a flyer plate in a light gas gun test. Details of the plasma spray process used to create the graded coating will be discussed, microstructures will be presented, and light gas gun test data will be reviewed. | ||