美国通用电器公司研究了一种独特的陶瓷型芯材料,因此,使该公司的铸造工艺有了新的突破,它将首次允许采用定向共晶高温合金来制造空心的、形状复杂的喷气发动机零件。 定向共晶高温合金,是人们所知的最强、最耐高温的合金之一,现正处在最后的研制阶段,据称,它很可能被用于正在研制的八十年代先进飞机的燃气涡轮叶片和其它零件。由于这种合金的耐高温能力强,故可使发动机的耗油率下降1%,并使推力提高17%。 很早以前,人们就知道氧化铝是一种化学性能符合要求的型芯材料,它是很少几种不与熔融共晶高温合金反应的材料之一。但是,由于化学溶解度和退让性差,取消了它用作型芯的资格。主要的障碍是化学溶解度,通常认为普通 General Electric Company of GE studied a unique ceramic core material, so that the company’s casting process has made a new breakthrough, it will for the first time allow the use of oriented eutectic superalloy to manufacture hollow, complex shape jet engine parts . Directional eutectic superalloys, one of the strongest and hottest alloys known to date, are in the final stages of development and are said to be likely to be used in the gas of the advanced aircraft under development in the 1980s Turbine blades and other parts. Due to the high temperature resistance of this alloy, the fuel consumption of the engine can be reduced by 1% and the thrust by 17%. It has long been known that alumina is a chemically competent core material and is one of the few materials that does not react with molten eutectic superalloys. However, it is disqualified as a core due to poor chemical solubility and concession. The main obstacle is chemical solubility, which is generally considered normal