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    Lightweight boron carbide materials with improved mechanical properties and process for their manufacture
    3.
    发明申请
    Lightweight boron carbide materials with improved mechanical properties and process for their manufacture 有权
    轻质碳化硼材料具有改进的机械性能及其制造工艺

    公开(公告)号：US20070010391A1

    公开(公告)日：2007-01-11

    申请号：US11174689

    申请日：2005-07-05

    申请人： Biljana Mikijelj ,  Georg Victor ,  Karl Schwetz

    发明人： Biljana Mikijelj ,  Georg Victor ,  Karl Schwetz

    IPC分类号： C04B35/563

    CPC分类号： C04B35/563 ,  C04B35/62695 ,  C04B35/645 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3225 ,  C04B2235/3409 ,  C04B2235/3865 ,  C04B2235/5409 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/656 ,  C04B2235/72 ,  C04B2235/721 ,  C04B2235/722 ,  C04B2235/77 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/79 ,  C04B2235/85

    摘要： This disclosure describes sintered bodies comprising about 90 wt % to about 99 wt % of boron carbide, wherein the B:C atomic ratio ranges from 3.8 to 4.5:1; 0 to 1 wt % free carbon; 0 to 1 wt % BN or AlN, remainder an oxide binder phase; said sintered body having a uniform microstructure composed of substantially equiaxed grains of said boron carbide; the oxide binder phase comprising a least a rare earth aluminate and optionally other ternary or binary phases of rare earth oxide—alumina systems; the binder phase being present in form of pockets at the multiple grain junctions and the density of no more than 2.6 g/cm3. Also described is a manufacturing process for the above described substantially pore-free, sintered boron carbide materials with high strength and fracture toughness, which can be used for production of large-area parts. It is achieved by liquid phase low temperature—low pressure hot pressing of boron carbide in an argon atmosphere.

    摘要翻译： 本公开内容描述了包含约90重量％至约99重量％的碳化硼的烧结体，其中B：C原子比范围为3.8至4.5:1; 0至1重量％游离碳; 0至1wt％的BN或AlN，余下为氧化物粘结相; 所述烧结体具有由所述碳化硼的基本上等轴晶粒组成的均匀微观结构; 氧化物粘结相包含至少一种稀土铝酸盐和任选的其它稀土氧化物 - 氧化铝体系的三元或二元相; 粘结相以多个晶界处的凹穴形式存在，密度不超过2.6g / cm 3。 还描述了上述基本上无孔的烧结碳化硼材料的制造方法，其具有高强度和断裂韧性，可用于生产大面积部件。 在氩气氛中通过液相低温低压热压碳化硼来实现。

    Process for the production of oxygen-free copper casting and moldings
    4.
    发明授权
    Process for the production of oxygen-free copper casting and moldings 失效
    生产无氧铜铸件和模具的工艺

    公开(公告)号：US4118256A

    公开(公告)日：1978-10-03

    申请号：US738819

    申请日：1976-11-04

    申请人： Karlheinz G. Schmitt-Thomas ,  Alfred Lipp ,  Karl Schwetz

    发明人： Karlheinz G. Schmitt-Thomas ,  Alfred Lipp ,  Karl Schwetz

    IPC分类号： C22F1/08

    CPC分类号： C22F1/08

    摘要： A process for the production of oxygen free copper castings and moldings, which contain 0.05 to 0.2% by weight of boron as micro-alloy element, by deoxidation of oxygen containing copper melts by means of calcium hexaboride, comprising introducing 0.3-1% by weight of a CaB.sub.6 into the copper melt, the CaB.sub.6 containing at least 3% C calculated on the weight of the CaB.sub.6, subsequently subjecting the cooled melt, if desired while molding the same, to a solution annealing operation and following up with a storage for an extended time.

    摘要翻译： 一种生产无氧铜铸件和模制品的方法，其中含有0.05至0.2重量％的硼作为微合金元素，通过六硼化钙对含氧铜熔体进行脱氧，包括引入0.3-1重量％ 的CaB 6加入到铜熔体中，CaB 6含有至少3％C，根据CaB 6的重量计算，随后如果需要，将冷却的熔体在其模塑的同时进行固溶退火操作，随后用 延长时间