The Effect of La2o3 on the Properties of Molybdenum Rhenium Alloy

Abstract

Molybdenum rhenium alloy has excellent room temperature processing performance and high-temperature performance, and is widely used in industries such as aerospace and nuclear industry. In this article, under the solid solution strengthening effect of molybdenum rhenium alloy, the addition of rare earth lanthanum oxide forms a dispersion strengthening effect. The research results show that adding 0.6% or less lanthanum oxide can refine the powder particle size and sintered grain size, improve room temperature tensile strength and elongation; As the content of lanthanum oxide increases, the tensile strength at 900 ℃ and 1100 ℃ also increases. The change in elongation is not significant, while the trend of tensile strength and elongation after fracture at 1300 ℃ is basically consistent. When the content of lanthanum oxide is 0.6%, it has the maximum strength and elongation.

Keywords: Molybdenum Rhenium alloy, Rare earth oxide, Powder preparation, Mechanical properties, Fracture morphology