| Abstract Scope |
In this presentation, the authors will discuss the mechanical and microstructural properties of several different materials cold sprayed using different gas compositions. These gases include nitrogen derived from multiple sources, air, helium, and hydrogen. Specifically, this work will explore the variations in microstructure, porosity, particle compaction, hardness, and/or strength, and how these properties can vary by using different gas types. Some of this work explores the difference in deposit quality and properties through the use of nitrogen derived from different sources including nitrogen generation, high purity bottled, as well as gas derived from liquid nitrogen. These nitrogen sprays will also be compared directly with sprays performed using dry air. Other work presented will show the performance achieved using helium and hydrogen spraying including the sensitivity of certain materials to reaction with hydrogen during deposition. Much of this work explores the properties of materials as deposited, while some experiments also explored thermally processing these materials to improve interparticle bonding and overall mechanical performance. |