Army Research Office Programs in Beam Technology and Surface Engineering

摘要

The objective here is to provide some idea of needs and opportunities for futureresearch with potential for providing new capabilities for Army systems. The technical objectives of the program are (1) to discover the atomic, molecular and macroscopic processes governing deterioration and adhesion of materials, (2) to provide improved materials stability and longer term performance capability for Army systems, and (3) to educate the next generation of skilled scientists in areas of Army research opportunities and needs. Two principal thrust areas,(1) Beam Technology and Surface Modification and (2) Non-Destructive Characterization of Materials and Processes, are the templates for fulfilling the technical objectives of the program. New directions in nondestructive characterization, adhesion, non-equilibrium processing of refractory materials, ultrastrong laminates, green processing of corrosion resistant coatings and superhard coatings will be reviewed. Research at the University of Wisconsin, Milwaukee (Carolyn Aita); has provided a characterization scheme (metastable phase maps) for refractory metal oxide sputter depositions. These results have depended on careful spectroscopic plasma characterization and determination of the crystallinity of films with x-ray, XPS and other methods. The University of Michigan (Bilello, Yalisove and Srolovitz) refractory metals laminates project where synchrotron topography and double crystal diffractometry techniques and theory are being applied to monitor and predict residual stresses and properties of nanolaminate materials. A current program in chemical analysis with low and medium energy ion beams is underway at Vanderbilt University (Robert Weller). A new form of backscattering spectrometry using medium energy ions and time-of-flight detection has been developed that is particularly useful for characturizing surfaces and th.