BE-SI ALLOY FOR STRUCTURAL PARTS

摘要

Parts formed from a beryllium-silicon alloy containing approximately 62 weight percent silicon are readily castable without the formation of large porosities or shrinkage cavities on cooling. They are characterized by a high ratio of elastic modulus to density and a high ratio of thermal conductivity to thermal expansion, are relatively homogeneous and isotropic throughout, and are surprisingly less brittle than either of their component metals. They are especially useful as mirror substrates.