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首页> 外文会议>2002 World Congress on Powder Metallurgy amp; Particulate Materials Pt.2 Jun 16-21, 2002 Orlando, FI >Novel Techniques for the Fabrication of Titanium Aluminide Thermal Protection Systems (TPS) for Aerospace Applications
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Novel Techniques for the Fabrication of Titanium Aluminide Thermal Protection Systems (TPS) for Aerospace Applications

机译：用于航空航天业的铝化钛热保护系统（TPS）制造的新技术

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摘要

There is significant interest in the use of intermetallic alloys, such as titanium aluminide, in Thermal Protection Systems (TPS) on next-generation low orbit and re-entry space vehicles, based on their good mechanical performance at elevated temperatures, resistance to oxidation and low specific density. However, actual applications of titanium aluminides have been limited due to their low ductility at ambient temperature and difficulty in shaping the alloys using traditional metalworking practices such as machining, cold working, casting, etc. Ultra-lightweight, porous titanium aluminide alloys are being fabricated based on technologies being developed at the Fraunhofer Institute and Fraunhofer USA Centers for Manufacturing and Advanced Materials, located in Dresden, Germany and Newark, DE, USA, respectively. Powder metallurgy processing routes are being utilized to fabricate hollow metal spheres and reaction sintered TiAl and TiAl_3 intermetallics. The processing, microstructures, and selected properties of these controlled-porosity materials are presented, along with a discussion of potential application as thermal protection systems.
机译：基于金属间合金，例如铝化钛，在下一代低轨道和再进入航天器的热保护系统（TPS）中的使用引起了极大的兴趣，这是因为它们在高温下具有良好的机械性能，抗氧化性和抗氧化性。比密度低。但是，由于铝化钛在环境温度下的延展性低以及难以使用传统的金属加工方法（例如机加工，冷加工，铸造等）对合金进行成形，因此其实际应用受到了限制。正在制造超轻质多孔铝化钛合金基于分别位于德国德累斯顿和美国特拉华州纽瓦克的弗劳恩霍夫研究所和弗劳恩霍夫美国制造与先进材料中心开发的技术。粉末冶金工艺路线正在用于制造空心金属球和反应烧结的TiAl和TiAl_3金属间化合物。介绍了这些可控孔隙率材料的加工，微结构和选定的性能，并讨论了作为热保护系统的潜在应用。

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