High Temperature Oxidation Resistance of the Beryllides

The intermetallic compounds of beryllium with the transition elements were surveyed for potential as high-temperature materials in aerospace applications. Beryllides from fifteen binary and three ternary systems were examined for oxidation resistance. Oxidation data in the temperature range from 2300 to 3000 F (1260 to 1649 C) are given for CrBe₂, CrBe₁₂, (Gd, Zr) Be₁₃, (Hf, Zr)Be₁₃, Hf₂Be₁₇, Hf₂Be₂₁, MoBe₁₂, Nb₂Be₁₇, NbBe₁₂, TaBe₃, Ta₂Be₁₇, TaBe₁₂, TiBe₂, TiBe₁₂, (U, Zr)Be₁₃, WBe₂₂, Zr₂Be₁₇ and ZrBe₁₃, As GdBe₁₃ was not oxidation resistant in this temperature range, oxidation data for this compound are given for 1800 and 2000 F (982 to 1093 C).

Other compounds which were judged not to possess sufficient oxidation resistance at 2300 F to warrant consideration for high-temperature applications in an oxidizing atmosphere include CeBe₁₃, HfBe₁₃, LaBe₁₃, MoBe₂, NbBe₂, NbBe₃, TaBe₂, ThBe₁₃, UBe₁₃, WBe₂, WBe₁₂, ZrBe₅ and the beryllides of Pd, Pt and V.