Oxidation of Mo-41 Re at Low Oxygen Pressures: 2000 Status Report

[摘要] Rhenium generally improves the properties of molybdenum, and, therefore, there is interest in use of Mo-Re alloys in space system applications. Both Mo and Re have relatively low solubilities for oxygen but readily form oxide scales when exposed to oxidizing environments above {approx}350 C. Studies are being conducted on Mo-41Re to determine the rate of oxidation, type of scale formation, and effects on mechanical properties as a function of temperature and partial pressure of oxygen. Thus far, weight gains associated with formation of MoO{sub 2} have been found for P{sub o{sub 2}} < 10{sup -3} Pa (torr) in vacuum, and weight losses associated with evaporation of MoO{sub 3} above 10{sup -3} Pa. However, no significant changes in tensile properties were measured.

[发布日期] 2000-12-06 [发布机构] Oak Ridge National Laboratory

[关键词] Tensile Properties;Partial Pressure;Mechanical Properties;Alloys;Oxygen