Method for making ceramic-metal composites and the resulting composites
    2.
    发明授权
    Method for making ceramic-metal composites and the resulting composites 失效
    制备陶瓷 - 金属复合材料的方法和所得到的复合材料

    公开(公告)号:US6027826A

    公开(公告)日:2000-02-22

    申请号:US538264

    申请日:1995-10-02

    摘要: The invention provides methods to manufacture dense, complex c-axis oriented ceramic oxide layers with thickness greater than 2.5 microns (.mu.m) on a metallic substrate (composites) without the use of an interfacial barrier, buffer, or surface layer using a metalorganic deposition process and thermomechanical reaction treatments is disclosed. A porous amorphous metal oxide ceramic deposit is formed directly on the substrate by spray pyrolyzing a mixed metalorganic precursor solution onto the metallic substrate. The metallic substrate has been previously heated to temperatures greater than the boiling point of the organic solvent and are high enough to initiate in situ decomposition of the metalorganic precursor salts. The process does not apply the precursor solution to the substrate as a liquid coating that is pyrolyzed in subsequent processing steps. The resultant porous amorphous oxide deposit is processed into a dense amorphous ceramic, or a fully crystallized c-axis oriented ceramic through a series of mechanical compression and short reaction treatments that are used to crystallize the amorphous ceramic layer. The inventive method applies to making complex ceramic oxides including superconducting compositions of bismuth cuprate ceramic, piezoelectric or insulating compositions. The composites so produced are useful in devices that include ceramic sputtering targets, heat shields, electrically conducting wires, magnetic solenoids, electromagnetic shielding, and energy storage devices. The invention also provides the ceramic-metal composites so made.

    摘要翻译: 本发明提供了在金属基材(复合材料)上制造厚度大于2.5微米(μm)的致密的,复杂的c轴取向的陶瓷氧化物层的方法,而不使用界面屏障,缓冲层或表面层,使用金属有机沉积 公开了工艺和热机械反应处理。 通过将混合的金属有机前体溶液喷雾热分解到金属基底上,直接在基底上形成多孔无定形金属氧化物陶瓷沉积物。 金属基底已经预先加热到高于有机溶剂的沸点的温度,并且足够高以引发金属有机前体盐的原位分解。 该方法不将前体溶液作为在随后的加工步骤中热解的液体涂层施加于基材。 所得的多孔无定形氧化物沉积物通过用于结晶无定形陶瓷层的一系列机械压缩和短反应处理而被加工成致密无定形陶瓷或完全结晶的c轴取向陶瓷。 本发明的方法适用于制备复合陶瓷氧化物,包括铜酸铋陶瓷,压电或绝缘组合物的超导组合物。 如此生产的复合材料可用于包括陶瓷溅射靶,隔热罩,导电线,磁螺线管,电磁屏蔽和储能装置的器件。 本发明还提供如此制成的陶瓷 - 金属复合材料。