Abrasive articles including abrasive particles of silicon nitride
    1.
    发明授权
    Abrasive articles including abrasive particles of silicon nitride 有权
    研磨制品包括氮化硅的磨料颗粒

    公开(公告)号:US08986409B2

    公开(公告)日:2015-03-24

    申请号:US13539369

    申请日:2012-06-30

    摘要: An abrasive article includes a body having abrasive particles contained within a bond material. The abrasive particles can include a majority content of silicon nitride and a minority content of sintering material including at least two rare-earth oxide materials. In an embodiment, the rare-earth oxide materials can include Nd2O3 and Y2O3. In a particular embodiment, the abrasive particles comprise a content (wt %) of Nd2O3 that is greater than a content of Y2O3 (wt %).

    摘要翻译: 磨料制品包括具有包含在粘合材料内的磨料颗粒的主体。 研磨颗粒可以包括大部分氮化硅含量和少量含有至少两种稀土氧化物材料的烧结材料。 在一个实施方案中,稀土氧化物材料可以包括Nd 2 O 3和Y 2 O 3。 在一个具体实施方案中,磨料颗粒包含大于Y 2 O 3含量(重量%)的Nd 2 O 3的含量(重量%)。

    METHODS OF FORMING SINTERED BORON CARBIDE
    5.
    发明申请
    METHODS OF FORMING SINTERED BORON CARBIDE 审中-公开
    烧结碳硼化物的方法

    公开(公告)号:US20110227259A1

    公开(公告)日:2011-09-22

    申请号:US12841474

    申请日:2010-07-22

    IPC分类号: C04B35/645 C04B35/64

    摘要: A method of forming a sintered boron carbide body includes washing boron carbide powder with essentially pure water at an elevated temperature to generate low oxygen boron carbide powder, mixing a sintering aid and a pressing aid with the low oxygen boron carbide powder to form a green mixture, and shaping the green mixture into a green boron carbide body. The method can include mixing titanium carbide powder having an average particle diameter in a range of between about 5 nm and about 100 nm with the low oxygen boron carbide powder. The method can further include sintering the green boron carbide body, and hot isostatic pressing the sintered body, to a density greater than about 98.5% of the theoretical density (TD) of boron carbide. Alternatively, the method can include sintering the shaped boron carbide green body at a temperature greater than about 2,200° C., to thereby form a eutectic liquid solid solution of B4C/SiC, forming a sintered boron carbide body with a density greater than about 98% TD.

    摘要翻译: 形成烧结碳化硼体的方法包括在升高的温度下用基本纯净的水洗涤碳化硼粉末以产生低氧碳化硼粉末,将烧结助剂和压制助剂与低氧碳化硼粉末混合以形成绿色混合物 ,并将绿色混合物成形为绿色碳化硼体。 该方法可以包括将平均粒径在约5nm至约100nm范围内的碳化钛粉末与低氧碳化硼粉末混合。 该方法可以进一步包括将生坯碳化硼体烧结,以及将等温压制烧结体的密度大于碳化硼理论密度(TD)的约98.5%的密度。 或者,该方法可以包括在大于约2200℃的温度下烧结成形碳化硼生坯,从而形成B4C / SiC的共晶液体固溶体,形成密度大于约98的烧结碳化硼体 %TD。

    METHOD OF PREPARING PRESSURELESS SINTERED, HIGHLY DENSE BORON CARBIDE MATERIALS
    7.
    发明申请
    METHOD OF PREPARING PRESSURELESS SINTERED, HIGHLY DENSE BORON CARBIDE MATERIALS 审中-公开
    制备无压烧结的方法,高密度硼硼碳材料

    公开(公告)号:US20110160035A1

    公开(公告)日:2011-06-30

    申请号:US13045356

    申请日:2011-03-10

    IPC分类号: C04B35/563 C04B35/565

    摘要: In a method of preparing a boron carbide material, boron carbide powder is washed with essentially pure water at an elevated temperature to generate washed boron carbide powder. The washed boron carbide powder is combined with a sintering aid. The mixture of the boron carbide powder and the sintering aid is pressed to form a shaped material, and the shaped material is sintered. A sintered boron carbide material comprises a boron carbide component that includes boron carbide, elemental carbon, and not more than about 0.6 wt % of oxygen on the basis of the total weight of the boron carbide component. The sintered boron carbide material has a density of at least about 99% of the theoretical density. Another sintered boron carbide material comprises a boron carbide component that includes boron carbide, silicon carbide, elemental carbon, and not more than about 0.3 wt % oxygen on the basis of the total weight of the boron carbide component, and has a density of at least about 97% of the theoretical density.

    摘要翻译: 在制备碳化硼材料的方法中,碳化硼粉末在高温下用基本上纯的水洗涤以产生洗涤的碳化硼粉末。 将洗涤的碳化硼粉末与烧结助剂组合。 将碳化硼粉末和烧结助剂的混合物压制以形成成形材料,并将成形材料烧结。 烧结碳化硼材料包括碳化硼组分,其包含碳化硼,元素碳,基于碳化硼组分的总重量不超过约0.6重量%的氧。 烧结碳化硼材料的密度至少为理论密度的约99%。 另一种烧结碳化硼材料包括碳化硼组分,其包含碳化硼,碳化硅,元素碳和基于碳化硼组分的总重量不大于约0.3重量%的氧,并且至少具有至少 约97%的理论密度。

    Dilatant mold and dilatant molding apparatus
    9.
    发明授权
    Dilatant mold and dilatant molding apparatus 失效
    膨胀模和膨胀成型装置

    公开(公告)号:US4518335A

    公开(公告)日:1985-05-21

    申请号:US589906

    申请日:1984-03-14

    申请人: Vimal K. Pujari

    发明人: Vimal K. Pujari

    摘要: An apparatus for molding complex powder articles having a two part dilatant mold resiliently coupled. The two halves of the mold are resiliently pressed into physical contact with each other by external means. A vacuum pump connected to the mold produces a fluidized powder material flow from a powder feed mechanism into the mold cavity. A vibrator vibrates the mold during the filling of the mold cavity with powdered material with a force sufficient to slightly separate the two halves of the mold cyclically dilating the volume of the mold cavity. The dilation of the mold cavity in combination with the fluidized powder feed permits the mold cavity to be uniformly filled with powder material. Dilation of the mold cavity also compacts the powder material received in the mold.

    摘要翻译: 用于模制具有弹性耦合的两部分膨胀模的复杂粉末制品的装置。 模具的两半通过外部手段弹性压制成彼此物理接触。 连接到模具的真空泵产生从粉末进料机构流入模腔的流化粉末材料流。 振动器在用粉末材料填充模腔期间振动模具,其力具有足以稍微分离模具的两个半部循环地扩大模具腔的体积。 与流化粉末进料结合使模腔膨胀允许模腔均匀地填充粉末材料。 模具腔的扩张也压实了在模具中接收的粉末材料。