美国的下一个航天计划是建立自由空间站和进行一切可能的未来开发。其中许多先进技术将大部分靠新材料的开发来获得。出于这个原因,先进的航空航天推进器和动力装置的材料研究成了NASA刘易斯研究中心奋斗的重要目标。航天推进器和空间动力系统的材料一般必须质量小、耐高温、强度高、环境承受力强、长期工作性能稳定,并且具有很好的设计性、加工性、维修性,价格适宜。空间推进系统要求零件接触高温气体,工作寿命从几分钟到几小时(重复使用性要求循环接触)。通常要承受点火引起突发的高温。这种循环受热导致热机疲劳,减少系统的使用期。另一方面,空间动 The next space program in the United States is to establish a free space station and carry out all possible future developments. Many of these advanced technologies will be based largely on the development of new materials. For this reason, advanced materials research for aerospace propulsion and power plants has become an important goal for the NASA Lewis Research Center. Space propeller and space power system materials generally have to be small in quality, high temperature, high strength, environmental sustainability, long-term performance and stability, and has good design, processability, maintainability, affordable. Space propulsion systems require that parts come into contact with hot gases, with working lifetimes of minutes to hours (reusability requires cyclic contact). Usually to withstand sudden high temperatures caused by ignition. This cycle of heat leads to thermal fatigue, reducing system life. On the other hand, space moves