A number of coatings having a variety of melting points which could be located beneath the surface of a fueled graphite sphere were investigated. Of the lower melting point materials, nickel and a special glass compound appeared to form continuous coatings when a hot-pressing technique was employed. Several high-melting materials, such as Ti, Cr, and MoSi2, showed some promise, even though present equipment limitations prevented these specimens from being hot-pressed at the melting point of the coating.
展开▼
