[20] 徐海江。碳化硅纤维增强的金属基和陶瓷基复合材料[J]。宇航材料工艺,1994,(6):13-18。
XU H J. Metal matrix composite and ceramic matrix composite reinforced by SiC fiber[J]. Aerospace Materials & Technology, 1994, (6):13-18.
通过对超硬铝合金7175T74的试验研究,给出了7175T74合金的锻造工艺参数。 依此工艺生产的锻件其性能达到美国宇航材料规范AMS4149A规定的技术指标。
By experimental research on the superhard aluminum alloy 7175T74, the parameters of forging process of 7175T74 are given, which achieve the mechanical property of the of U. S. 'AMS4149A.
给宇航局明天的月亮,连同所有将人和材料送上月球所需要的那些新的华而不实的硬件, 以换琅目前的飞船退休计划会是一个很聪明的手段。
Offering the agency the moon tomorrow—complete with all the flashy new hardware required to get people and materials up there—in exchange for a shuttle-retirement plan today would be a clever ploy.
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