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

DiStefano, JR

Oak Ridge National Laboratory

关键词: Tensile Properties;    Partial Pressure;    Mechanical Properties;    Alloys;    Oxygen;   

DOI  :  10.2172/814084
RP-ID  :  ORNL/TM-2000/291
RP-ID  :  AC05-00OR22725
RP-ID  :  814084

美国|英语

来源: UNT Digital Library

【 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.