This paper describes recent aerospace applications where Be-38Al (AlBeMet) has been successfully applied to produce optics and stable support structures. The information presented touches on historical uses of beryllium and beryllium-aluminum in satellite optical systems, and then presents recent uses and developments of Be-38Al and its application to optical substrates and stable support structures.
In optical systems just like any other space borne system, thermal control plays an important role. In fact, most advanced designs are plagued with volume constraints that further complicate the thermal control challenges for even the most experienced systems engineers. Peregrine will present advances in satellite thermal control based upon passive heat transfer technologies to dissipate large thermal loads. This will address the use of 700 W/m K and higher conducting products that are five times better than aluminum on a specific basis providing enabling thermal control while maintaining structural support.
Basic design guidelines for beryllium precision structures are discussed and a thorough presentation is given on the design evolution of the RGA integrating structure for ESA's XMM Mission. Beryllium producibility issues, manufacturing flowcharts and flight heritage data is reviewed.
This paper will describe many recent aerospace applications where beryllium was successfully used in different types of optical support structures. It discusses how several manufacturing methods including machining metallurgical brazing epoxy bonding and near-net-shape processing were used to produce the desired overall configurations. The installation of non-beryllium inserts is also discussed in detail. Typically made of titanium these inserts allow the end user to final finish mechanical attach points and optical lapping points thus circumventing potential toxicity hazards associated with airborne beryllium particles. Data is also presented about the stress and stability characteristics in some of the more specialized applications as well as weight and stiffness.