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    • 52. 发明公开
    • Cubic boron nitride manufacture
    • 立方氮化硼制造
    • EP0255327A3
    • 1988-08-31
    • EP87306632
    • 1987-07-28
    • DE BEERS INDUSTRIAL DIAMOND DIVISION (PROPRIETARY) LIMITED
    • Hedges, Lesley KayRobertson, Stuart HedleyDavies, Geoffrey John
    • C30B29/38C30B09/00
    • C30B9/00B01J3/062B01J2203/0645B01J2203/066B01J2203/068C30B29/403Y10T117/1096
    • A method is provided for producing large cubic boron nitride crystals having the size of 0,1 carat or larger. The method involves providing a reaction vessel which contains CBN seed material, a CBN source separated from the seed material by a mass of solvent/catalyst for CBN synthesis which is capable of melting under CBN synthesis conditions, the separation of seed material and source material being such that under the operating conditions of CBN synthesis a temperature gadient is created between the seed material and the source material with the seed material being located at a point near the minimum value of temperature of the temperature gradient and the source material being located at a point near the maximum value of temperature of the temperature gradient, placing that reaction vessel in the reaction zone of a high temperature/high pressure apparatus and subjecting the contents of the reaction vessel to conditions of temperature and pressure in the CBN stable region of the boron nitride phase diagram for a period of at least several hours.
    • 提供了一种生产尺寸为0.1克拉或更大的大立方氮化硼晶体的方法。 该方法包括提供包含CBN种子材料的反应容器,通过用于CBN合成的溶剂/催化剂的质量与种子材料分离的CBN源,其能够在CBN合成条件下熔化,种子材料和源材料的分离为 使得在CBN合成的操作条件下,在种子材料和源材料之间产生温度gad子,其中种子材料位于温度梯度的最小温度值附近的点处,并且源材料位于一点 接近温度梯度温度的最大值,将该反应容器置于高温/高压设备的反应区中,并将反应容器的内容物置于氮化硼的CBN稳定区域中的温度和压力条件下 相图至少持续几个小时。
    • 54. 发明公开
    • Cubic boron nitride abrasive bodies
    • 立方氮化硼研磨体
    • EP0220964A3
    • 1987-12-02
    • EP86308445
    • 1986-10-29
    • DE BEERS INDUSTRIAL DIAMOND DIVISION (PROPRIETARY) LIMITED
    • Phaal, CorneliusDodsworth, John
    • B24D03/00
    • B24D3/16B24D3/007
    • A tool insert comprises an abrasive compact comprising a polycrystalline mass of cubic boron nitride particles present in an amount of at least 70 percent by volume and containing substantial direct particle-to-particle bonding and a second phase dispersed through the cubic boron nitride particle mass. The abrasive compact presents major surfaces on each of opposite sides thereof. The one major surface provides a cutting point for the insert and the other major surface has bonded thereto a layer of molybdenum of thickness less than 0,5 mm. The largest linear dimension of the compact is no more than 10 mm. The tool insert is designed for applications where a high removal rate of work piece is desired.
    • 一种工具插入物包括研磨压块,该研磨压块包括以至少70体积%的量存在并包含基本上直接的颗粒间粘结的立方氮化硼颗粒的多晶块和通过立方氮化硼颗粒块分散的第二相。 该磨具在其相对侧的每一侧都具有主表面。 一个主表面为插入物提供切割点,另一个主表面与其结合一层厚度小于0.5mm的钼层。 压缩机的最大线性尺寸不超过10毫米。 该工具刀片专为需要高工件切除率的应用而设计。