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。

    High Toughness Ceramic Composites
    6.
    发明申请
    High Toughness Ceramic Composites 审中-公开
    高韧性陶瓷复合材料

    公开(公告)号:US20110175264A1

    公开(公告)日:2011-07-21

    申请号:US12841432

    申请日:2010-07-22

    摘要: A method of forming a sintered silicon carbide body includes mixing silicon carbide powder having an oxygen content of less than about 3 wt % and having a surface area in a range of between about 8 m2/g and about 15 m2/g, with boron carbide powder and carbon sintering aid to form a green silicon carbide body. Alternatively, a method of producing a sintered silicon carbide body includes mixing the silicon carbide powder with titanium carbide powder having an average particle diameter in a range of between about 5 nm and about 100 nm and with carbon sintering aid to form a green silicon carbide body. In another alternative, a method of forming a sintered silicon carbide body includes mixing silicon carbide powder with boron carbide powder, the titanium carbide powder, and carbon sintering aid to form a green silicon carbide body. After sintering, the silicon carbide bodies have a density at least 98% of the theoretical density of silicon carbide.

    摘要翻译: 形成烧结碳化硅本体的方法包括将具有小于约3重量%的氧含量的碳化硅粉末与表面积在约8m 2 / g至约15m 2 / g范围内的碳化硼混合, 粉末和碳烧结助剂形成绿色碳化硅体。 或者,制造烧结碳化硅体的方法包括将碳化硅粉末与平均粒径在约5nm至约100nm范围内的碳化钛粉末和碳烧结助剂混合以形成绿碳化硅体 。 在另一个替代方案中,形成烧结碳化硅本体的方法包括将碳化硅粉末与碳化硼粉末,碳化钛粉末和碳烧结助剂混合以形成绿碳化硅体。 烧结后,碳化硅体的密度为碳化硅理论密度的至少98%。

    CONSTRUCTION ARTICLES AND METHODS OF FORMING SAME
    7.
    发明申请
    CONSTRUCTION ARTICLES AND METHODS OF FORMING SAME 有权
    建筑文章及其形成方法

    公开(公告)号:US20130168079A1

    公开(公告)日:2013-07-04

    申请号:US13732187

    申请日:2012-12-31

    IPC分类号: E21B43/12

    CPC分类号: E21B43/12 Y10T428/249957

    摘要: A pipe choke for use in drilling and mining operations comprising a body including a first end and a second end configured to couple to a pipe, an opening extending through the body from the first end to the second end, and wherein the body includes a first phase comprising recrystallized silicon carbide and a second phase comprising silicon.

    摘要翻译: 一种用于钻井和采矿操作的管道扼流器,包括主体,其包括构造成联接到管道的第一端和第二端,从所述第一端延伸穿过所述主体到所述第二端的开口,并且其中所述主体包括第一端 包括再结晶的碳化硅和包含硅的第二相。