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    • 14. 发明公开
    • Diamond sinter, high-pressure phase boron nitride sinter, and processes for producing those sinters
    • 金刚石烧结体,高压氮化物相硼烧结体及其制造方法,该烧结体
    • EP0712941A1
    • 1996-05-22
    • EP94118222.2
    • 1994-11-18
    • AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGYNISSHIN FLOUR MILLING CO., LTD.READ CO., LTD.
    • Kume, ShoichiYoshida, HaruoYamada, YukiyoshiFuyuki, TadashiAkiyama, SatoshiHamada, YoshiakiKuroda, EisukeNabeya, TadakatsuSumita, YukioKimura, Kenichi
    • C23C14/22
    • C04B35/5831B01J3/062B01J2203/062B01J2203/0645B01J2203/0655B01J2203/066B01J2203/0685C22C26/00C23C16/4417
    • A powder of diamond or high-pressure phase boron nitride core particles is charged into a coating space as it is dispersed to a dispersity that is preset in accordance with the average diameter of those core particles and a precursor of a coat forming substance that is either generated via the vapor phase or in a vapor-phase state is allowed to contact and/or impinge against the particles in said powder of core particles so that their surfaces are covered with the coat forming substance, thereby preparing coated diamond or high-pressure phase boron nitride particles, and these particles or mixtures containing them or mixtures of these particles with bonding materials are sintered under appropriate sintering conditions at a predetermined high temperature and pressure. The thusly produced diamond or high-pressure phase boron nitride sinter is composed of coated core particles of high performance that are superhard, uniform, dense and sintered firmly and which have a controlled microstructure. If sintering is done at pressures less than 2000 MPa, the invention offers the advantage of eliminating the constraint of the need to use equipment capable of creating ultrahigh pressures of at least 2000 MPa. The use of ultrahigh pressure HIP apparatus or other types of HIP apparatus offers the added advantage of enabling the production of shaped sinters, thereby presenting significant benefits to manufacture on an industrial scale.
    • 因为它是分散到分散性并在雅舞蹈预置与芯颗粒的平均直径和外套形成物质的前体所做的是无论是金刚石或高压相氮化硼核粒子的粉末被装入涂层空间 通过汽相或在气相状态下产生被允许接触和/或撞击在这样做了他们的表面覆盖有涂层形成物质,从而制备涂覆的金刚石或高压相芯颗粒的所述粉末的颗粒 氮化硼颗粒,以及颗粒或论文混合物含有它们的混合物或论文颗粒粘结材料以预定的高的温度和压力的适当的烧结条件下烧结。 将这样生产的金刚石或高压相氮化硼烧结由高性能涂覆芯颗粒确实是超硬的,均匀的,致密的和烧结的牢固且具有受控的微结构。 如果烧结在2000兆帕的压力少做,本发明提供消除了需要使用能够产生至少2000兆帕的超高压力的设备约束的优势。 使用超高压HIP装置或其它类型的HIP装置的提供使生产成形烧结体的,从而呈现显著好处制造上在工业规模的附加优点。