Defense Systems Digest - 15 January 2019

Source: Photo by Rick Goodfriend.

Notable Technical Inquiry

How is EPDM rocket motor insulation processed and integrated into rocket motors? How are Kevlar reinforcements used in solid rocket motor insulation? What are the key parameters and metrics used to evaluate elastomeric internal insulation materials?

An inquirer wanted to better...

Dr. James Bray, Chief Scientist, General Electric (GE) Global Research

Voice From The Community

Dr. James Bray
Chief Scientist, General Electric (GE) Global Research

For over four decades, I’ve supported GE Global Research in leveraging our multidisciplinary core capabilities and a workforce of over 1,000 subject matter experts to design and develop advanced solutions to complex, challenging problems. I’ve worked for many years with GE Healthcare on magnetic resonance imaging (MRI), which requires significant expertise in superconductivity and cryogenics. I’ve also been involved in the design and development of several prototype superconducting motors and generators, as well as the study and advancement of many types of energy and power sources. For more information about GE Research, visit

Featured News

Source: ARL
Source: ARLt

Join us for a live webinar presentation on “The Cold Spray Revolution!”

Wednesday 30 January 2019 – 12:00 to 12:45 p.m. EST

The deposition of metal powders onto surfaces has been done by thermal spray for over 100 years. In this process, metal particles are melted and blown onto the coated surface. Thermal spray processes thus apply engineered coatings to modify the surface properties of an item. These coatings can provide such properties as enhanced wear resistance, thermal barriers, electrical/thermal conductivity, hard-chrome replacement, and corrosion protection. The coatings can  be applied to turbine blades, shaft seals, medicals implants, etc.

The extreme heat required in thermal spray can compromise the powder and substrate characteristics. Cold spray was introduced 30 years ago in part to prevent this heat damage. Cold spray accelerates powder particles to very high velocity in a supersonic nozzle, and a deposit is formed when the particles impact on the surface. Read More