Super-High Temperature Alloys and Composites from NbW-Cr Systems

[摘要] Nickel base superalloys must be replaced if the demand for the materials continues to rise for applications beyond 1000{sup o}C which is the upper limit for such alloys at this time. There are non-metallic materials available for such high temperature applications but they all present processing difficulties because of the lack of ductility. Metallic systems can present a chance to find materials with adequate room temperature ductility. Obviously the system must contain elements with high melting points. Nb has been chosen by many investigators which has a potential of being considered as a candidate if alloyed properly. This research is exploring the Nb-W-Cr system for the possible choice of alloys to be used as a high temperature material.

[发布日期] 2008-12-31

[关键词] ALLOYS;CHROMIUM ADDITIONS;DUCTILITY;ELEMENTS;HEAT RESISTING ALLOYS;MATERIALS;MELTING POINTS;NICKEL;NIOBIUM ALLOYS;POTENTIALS;PROCESSING;RISE;TEMPERATURE RANGE 0400-1000 K;TUNGSTEN ADDITIONS;USES