Boron-carbide-aluminum and boron-carbide-reactive metal cermets
    1.
    发明授权
    Boron-carbide-aluminum and boron-carbide-reactive metal cermets 失效
    硼碳化物 - 铝和碳化硼反应性金属陶瓷

    公开(公告)号:US4605440A

    公开(公告)日:1986-08-12

    申请号:US730528

    申请日:1985-05-06

    摘要: Hard, tough, lightweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidation step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modulus of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi.sqroot.in. These composites and methods can be used to form a variety of structural elements.

    摘要翻译: 硬质,坚韧,轻质的碳化硼反应性金属复合材料,特别是碳化硼 - 铝复合材料。 这些复合材料具有多个阶段的组合物。 提供了一种方法,包括使原料润湿和反应的步骤,由此可以可控地选择所得复合材料中的微结构。 起始组成,反应温度,反应时间和反应气氛是控制工艺和所得组合物的参数。 陶瓷相均匀分布在金属相中,陶瓷 - 金属界面的粘合力最大化。 使用初始固结步骤来实现完全致密的复合材料。 已经生产了碳化硼 - 铝金属陶瓷的微结构,断裂模量超过110ksi,断裂韧性超过12ksi 2ROOT。这些复合材料和方法可用于形成各种结构元素。

    Multipurpose boron carbide-aluminum composite and its manufacture via
the control of the microstructure
    2.
    发明授权
    Multipurpose boron carbide-aluminum composite and its manufacture via the control of the microstructure 失效
    多功能碳化硼 - 铝复合材料及其制造通过控制微观结构

    公开(公告)号:US4702770A

    公开(公告)日:1987-10-27

    申请号:US759411

    申请日:1985-07-26

    摘要: Low-density composites are produced consisting chiefly of boron carbide and aluminum, or aluminum alloy, and minor amounts of ceramic material. The method allows control of the rate of reaction between boron carbide and metal so that the final components of the composite, and hence the mechanical properties, are controlled. The invention includes modification of the carbon content of the boron carbide composition, dispersion of boron carbide and formation of a compact, infiltration of the compact by aluminum or aluminum alloy, and heat treatments. The invention produces low-density boron carbide-aluminum composites with a homogeneous microstructure possessing desired mechanical properties.

    摘要翻译: 生产的低密度复合材料主要由碳化硼和铝或铝合金和少量的陶瓷材料组成。 该方法允许控制碳化硼和金属之间的反应速率,从而控制复合材料的最终组分,并因此控制其机械性能。 本发明包括碳化硼组合物的碳含量的修饰,碳化硼的分散体以及由铝或铝合金形成紧凑的压实体,以及热处理。 本发明生产具有所需机械性能的均匀微结构的低密度碳化硼 - 铝复合材料。

    Ceramic-metal composite and method to form said composite
    10.
    发明授权
    Ceramic-metal composite and method to form said composite 有权
    陶瓷 - 金属复合材料和形成所述复合材料的方法

    公开(公告)号:US06296045B1

    公开(公告)日:2001-10-02

    申请号:US09133109

    申请日:1998-08-12

    IPC分类号: B22D1914

    摘要: A ceramic-metal composite that is tough and stiff has been prepared and is comprised of an inert ceramic (e.g., alumina) embedded and dispersed in a matrix comprised of a metal (e.g., aluminum), a reactive ceramic (e.g., boron carbide) and a reactive ceramic-metal reaction product (e.g., AlB2, Al4BC, Al3B48C2, AlB12, Al4C3, AlB24C4 or mixtures thereof) wherein grains of the inert ceramic have an average grain size greater than or equal to the average grain size of grains of the reactive ceramic. The ceramic-metal composite may be prepared by forming a mixture comprised of an inert ceramic powder (e.g., alumina) and a reactive ceramic powder (e.g., boron carbide), the inert ceramic powder having an average particle size equal to or greater than the average particle size of the reactive ceramic powder, forming the mixture into a porous body and consolidating the porous body in the presence of a metal (e.g., aluminum) to form the ceramic-metal composite.

    摘要翻译: 已经制备了韧性和刚性的陶瓷 - 金属复合材料,其包括嵌入和分散在由金属(例如铝),反应性陶瓷(例如碳化硼)组成的基体中的惰性陶瓷(例如氧化铝) 和反应性陶瓷 - 金属反应产物(例如,AlB2,Al4BC,Al3B48C2,AlB12,Al4C3,AlB24C4或其混合物),其中惰性陶瓷的晶粒的平均晶粒尺寸大于或等于晶粒的平均晶粒尺寸 活性陶瓷。 陶瓷 - 金属复合材料可以通过形成由惰性陶瓷粉末(例如氧化铝)和反应性陶瓷粉末(例如碳化硼)组成的混合物来制备,惰性陶瓷粉末的平均粒度等于或大于 反应性陶瓷粉末的平均粒度,将混合物形成多孔体,并在金属(例如铝)的存在下固化多孔体以形成陶瓷 - 金属复合材料。