A. C. Hall, R. L. Williamson, C. Hall, J. W. Cates, D. A. Urrea, J. F. Mccloskey, Sandia National Laboratories, Albuquerque, NM; C. M. Weyant, Stony Brook University, Stony Book, NY; T. J. Roemer, A. J. Mayer, D. E. Beatty, Ketch Corporation, Albuquerque, NM; D. A. Hirschfeld, New Mexico Institue of Mining and Technology, Socorro, NM
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.
Use of graded coatings is a well-known strategy for creating a material with continuously changing physical properties. This paper describes an effort to create variable stiffness properties in flyer plate for light gas gun applications.
