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近年来,设计工程师已用镍、铁和钛的铝化物基合金取代宇航工业通常采用的合金、如:316SS不锈钢,Waspalloy、Hastelloy C、INCO718、IN813C等,用于抗高温和抗腐蚀。新的金属间化合物,由于密度较低、强度较高而减轻重量并提高高温抗氧化性能,与先进的陶瓷相比,提高了损伤容限。这些优点,成为高性能飞机结构和燃气涡轮机的候选材料。但是在环境温度内,仍有延展性与韧性低的问题。德国已研究一种新的粉末冶金方法成功地制成TiAl零件,可望商业生产,1990年粉末冶金会议上,W·G Smarsly(MTU)报告指出,新的工艺包括使用廉价的钛和铝粉末,而这些粉末可以任意比率随机混合和用真空热压预压成圆柱形,密度大于95％。该粉末混合物也含有弥散
In recent years, design engineers have replaced alloys commonly used in the aerospace industry with aluminum, aluminum, and titanium based alloys such as 316SS stainless steel, Waspalloy, Hastelloy C, INCO718, IN813C, etc. for high temperature and corrosion resistance. The new intermetallic compounds, due to lower density, higher strength and weight loss and improve high temperature oxidation resistance, compared with advanced ceramics, increased damage tolerance. These advantages make it a candidate material for high-performance aircraft structures and gas turbines. However, in the ambient temperature, there is still a problem of ductility and low toughness. Germany has studied a new powder metallurgy method for the successful production of TiAl parts and is expected to be commercialized. At the Powder Metallurgy Conference 1990, W · G Smarsly (MTU) reported that the new process included the use of inexpensive titanium and aluminum powders , And these powders can be randomly mixed at any ratio and pre-compressed into a cylindrical shape by vacuum hot pressing at a density greater than 95%. The powder mixture also contains dispersions