会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明公开
    • Core compositions and articles with improved performance for use in castings for gas turbine applications
    • 具有改进性能的芯组合物和制品用于燃气轮机应用的铸件
    • EP1016639A2
    • 2000-07-05
    • EP99309899.5
    • 1999-12-09
    • GENERAL ELECTRIC COMPANY
    • Klug, Frederic JosephGiddings, Robert Arthur
    • C04B35/111C04B35/65B22C9/10
    • C04B38/0058B22C1/22C04B35/111C04B35/634C04B35/63444C04B35/65C04B2111/00939C04B35/10C04B38/062
    • A method for fabricating a fired ceramic article, a green product, and a fired ceramic article, all for use as a core in the investment casting of directionally solidified eutectic and superalloy material. A ceramic slurry is prepared of alumina, aluminum and a solution of a polymerizable binder in a liquid. The slurry is extruded under low pressure into a closed cavity to form a gelled green product which is subsequently heated in an oxygen-containing atmosphere, wherein the oxygen reacts with the aluminum in the green product to form alumina which advantageously causes an increase in volume of the green product which counters the shrinkage effects of heating. The polymerizable binder is of a type which cross-links with the alumina and upon heating the liquid component of such binder vaporizes and the remaining polymer component subsequently gasifies on further heating to leave desired interstitial pores within the green product, which assist in allowing the oxygen to permeate the green product, which assists in oxidation of the aluminum through the green product. The green product is thereafter sintered to form a substantially dimensionally precise ceramic article suitable for precisioncasting of superalloy materials.
    • 一种用于制造焙烧陶瓷制品,绿色产品和烧制陶瓷制品的方法,所有这些都用作定向凝固的共晶和超级合金材料的熔模铸造中的核心。 陶瓷浆料由氧化铝,铝和可聚合粘结剂在液体中的溶液制成。 将浆料在低压下挤出至封闭的空腔中以形成凝胶状绿色产物,随后在含氧气氛中加热,其中氧气与绿色产物中的铝反应形成氧化铝,其有利地导致体积增加 这种绿色产品抵消了加热的收缩效应。 可聚合粘合剂为与氧化铝交联的类型,并且在加热时,此类粘合剂的液体组分蒸发,并且随后进一步加热使剩余的聚合物组分气化,在绿色产品内留下期望的间隙孔隙,这有助于使氧气 渗透绿色产品,这有助于铝通过绿色产品的氧化。 此后将绿色产品烧结以形成适用于高温合金材料的精密铸造的基本上尺寸精确的陶瓷制品。