Process for preparing an amorphous ultrahard material on the basis of
boron nitride
    1.
    发明授权
    Process for preparing an amorphous ultrahard material on the basis of boron nitride 失效
    基于氮化硼制备非晶超硬材料的方法

    公开(公告)号:US5541144A

    公开(公告)日:1996-07-30

    申请号:US256997

    申请日:1994-07-29

    Inventor: Jorg Wildenburg

    Abstract: A process for preparing amorphous ultrahard material based on boron nitride which has a hardness sufficient to scratch diamond uses hexagonal or turbostratic boron nitride hBN as starting material. The starting material is compressed at pressures of at least 70 Kbar and heated to temperatures of at least of 1650.degree. C. until a boron nitride melt is obtained, the boron nitride melt is quenched by shutting off the heat supply and the quenched boron nitride melt is then relieved of the pressure. In the process, the hexagonal or turbostratic boron nitride employed as a starting material is treated in the presence of crystallisation inhibitors so that the formation of crystals is completely prevented and an amorphous structure is compacted by incorporation of reaction products comprising boron suboxides.

    Abstract translation: PCT No.PCT / EP93 / 00314 Sec。 371日期1994年7月29日第 102(e)日期1994年7月29日PCT提交1993年2月9日PCT公布。 出版物WO93 / 16015 日期1993年8月19日一种制备具有足以划伤金刚石的硬度的基于氮化硼的无定形超硬材料的方法使用六方晶或氮化硼氮化硼hBN作为原料。 起始材料在至少70Kbar的压力下被压缩并加热到至少1650℃的温度,直到获得氮化硼熔体,通过切断供热和淬火的氮化硼熔体来淬火氮化硼熔体 然后缓解压力。 在此过程中,在结晶抑制剂存在下处理用作起始材料的六方晶系或膨胀氮化硼,以便完全防止晶体的形成,并且通过掺入含有低氧化硼的反应产物使无定形结构压实。

    Process for producing amorphous boron nitride of high hardness
    2.
    发明授权
    Process for producing amorphous boron nitride of high hardness 失效
    生产高硬度非晶态硼酸盐的方法

    公开(公告)号:US5230873A

    公开(公告)日:1993-07-27

    申请号:US659339

    申请日:1991-03-11

    CPC classification number: C03C3/328 C04B35/583

    Abstract: A boron nitride, of amorphous structure, which can scratch diamond, is produced from hexagonal or turbostratic boron nitride as starting material. In the process for the production of the amorphous boron nitride, the starting material is subjected to pressures above 70 Kbar and temperatures of at least 1650.degree. C. for a period sufficient for the starting material to be completely melted, followed by quenching the resulting boron nitride melt and thereafter forming grains of amorphous boron nitride. The amorphous structure of the boron nitride is determined by X-ray and electron beam investigation.

    Abstract translation: PCT No.PCT / EP89 / 01049 Sec。 371日期1991年3月11日 102(e)1991年3月11日PCT PCT 1989年9月11日PCT公布。 出版物WO90 / 02704 日期为1990年3月22日。可以从六方晶或氮化硼作为起始材料制造可以划伤金刚石的无定形结构的氮化硼。 在制造无定形氮化硼的过程中,起始材料经受高于70Kbar的压力和至少1650℃的温度足以使原料完全熔化的时间,然后淬灭所得的硼 氮化物熔融,然后形成无定形氮化硼的晶粒。 通过X射线和电子束研究确定氮化硼的非晶结构。

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