[AIP SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM-STAIF 2007: 11th Conf Thermophys.Applic.in Micrograv.; 24th Symp Space Nucl.Pwr.Propulsion; 5th Conf Hum/Robotic Techn & Vision Space Explor.; 5th Symp Space Coloniz.; 4th Symp New Frontrs & Future Con - Albuquerque, New Mexico (USA) (11-15 February 2007)] AIP Conference Proceedings - Creep Property Characterization of Potential Brayton Cycle Impeller and Duct Materials