公开(公告)号：US5132245A

公开(公告)日：1992-07-21

申请号：US691402

申请日：1991-04-25

申请人： Haruo Yoshido ,  Shoichi Kume ,  Kazutaka Suzuki ,  Michihide Machida

发明人： Haruo Yoshido ,  Shoichi Kume ,  Kazutaka Suzuki ,  Michihide Machida

IPC分类号： C04B35/583 ,  C04B35/5831 ,  C04B35/645

CPC分类号： C04B35/645 ,  C04B35/5831

摘要： A cubic boron nitride-containing high-density inorganic composite is prepared by mixing cubic boron nitride with a powdered inorganic compound capable of forming a rigid sintered article having a density of at least 85% and a Vickers hardness of at least 800, which does not promote the conversion of cubic boron nitride into graphite-type phase boron nitride (hBN). The powder mixture is compressed into a mold, and fired at low pressure of between 1,000-2,000 MPa, at a temperature of not more than 1,500.degree. C., under which conditions the cubic boron nitride does not convert to hBN, but is sufficiently metastable to permit the formation of the high-density inorganic composite.

公开(公告)号：US5030596A

公开(公告)日：1991-07-09

申请号：US444718

申请日：1989-12-01

申请人： Shoichi Kume ,  Haruo Yoshida ,  Kazutaka Suzuki ,  Yoshio Tasaki ,  Shiro Ikuta ,  Masamitu Ishikawa ,  Michihide Machida

发明人： Shoichi Kume ,  Haruo Yoshida ,  Kazutaka Suzuki ,  Yoshio Tasaki ,  Shiro Ikuta ,  Masamitu Ishikawa ,  Michihide Machida

IPC分类号： C04B35/52 ,  B01J3/06 ,  C22C1/05 ,  C22C21/10 ,  C22C26/00

CPC分类号： B01J3/062 ,  B01J2203/062 ,  B01J2203/0655 ,  B01J2203/0685

摘要： A sintered article of diamond is obtained by coating the surface of diamond particles with 30 to 0.1% by volume, based on the total volume of the diamond particles and aids, of at least one member selected from the group consisting of the transition metals of Groups 4a, 5a, and 6a in the Periodic Table of Elements and boron and silicon, and sintering the coated diamond particles under conditions of high pressure and high temperature, which sintered article consists of 70 to 99.8% by volume of diamond and 30 to 0.2% by volume of the carbide of the coating substance. A method for the production of the sintered article of diamond is also disclosed.

公开(公告)号：US5043304A

公开(公告)日：1991-08-27

申请号：US436624

申请日：1989-11-15

申请人： Haruo Yoshida ,  Shoichi Kume ,  Kazutaka Suzuki ,  Michihide Machida

发明人： Haruo Yoshida ,  Shoichi Kume ,  Kazutaka Suzuki ,  Michihide Machida

IPC分类号： C04B35/583 ,  C04B35/5831 ,  C04B35/645

CPC分类号： C04B35/645 ,  C04B35/5831

摘要： A cubic boron nitride-containing high-density inorganic composite sintered article is produced by a method which essentially consists of preparing a mixture of a cubic boron nitride powder with an inorganic compound powder capable of forming a high-rigidity sintered article under the conditions permitting the cubic boron nitride to remain in a substantially metastable, though not thermodynamically stable, state, a mixture of an inorganic compound-coated cubic boron nitride powder with an inorganic compound powder, or an inorganic compound-coated cubic boron nitride powder, and sintering the mixture of the cubic boron nitride powder with an inorganic compound powder, the mixture of the inorganic compound-coated cubic boron nitride powder with an inorganic compound powder or an inorganic compound-coated cubic boron nitrides powder, under the conditions of not more than 2,000 MPa of pressure and not more than 1,500.degree. C. of temperature for permitting the cubic boron nitride to remain in a substantially metastable, though not thermodynamically stable, state for a period incapable of causing conversion of the cBN into a graphite-type phase.

摘要翻译： 通过以下方法制造立方氮化硼的高密度无机复合烧结体，其方法主要包括：在允许形成高刚性烧结体的条件下制备立方氮化硼粉末与能够形成高刚性烧结体的无机化合物粉末的混合物 立方氮化硼保持基本上亚稳态，虽然不是热力学稳定的状态，无机化合物涂覆的立方氮化硼粉末与无机化合物粉末或无机化合物涂覆的立方氮化硼粉末的混合物，并烧结混合物 立方氮化硼粉末与无机化合物粉末的混合物，无机化合物涂覆的立方氮化硼粉末与无机化合物粉末或无机化合物涂覆的立方氮化硼粉末的混合物在不大于2000MPa 压力不超过1500℃，允许立方氮化硼保留 在不能使cBN转化成石墨型相的时间段内基本上亚稳态但不是热力学稳定的状态。

公开(公告)号：US4902652A

公开(公告)日：1990-02-20

申请号：US216307

申请日：1988-07-08

申请人： Shoichi Kume ,  Haruo Yoshida ,  Kazutaka Suzuki ,  Yoshio Tasaki ,  Shiro Ikuta ,  Masamitu Ishikawa ,  Michihide Machida

发明人： Shoichi Kume ,  Haruo Yoshida ,  Kazutaka Suzuki ,  Yoshio Tasaki ,  Shiro Ikuta ,  Masamitu Ishikawa ,  Michihide Machida

IPC分类号： C04B35/52 ,  B01J3/06 ,  C22C1/05 ,  C22C21/10 ,  C22C26/00

CPC分类号： B01J3/062 ,  B01J2203/062 ,  B01J2203/0655 ,  B01J2203/0685

摘要： A sintered article of diamond is obtained by coating the surface of diamond particles with 30 to 0.1% by volume, based on the total volume of the diamond particles and aids, of at least one member selected from the group consisting of the transition metals of Groups 4a, 5a, and 6a in the Periodic Table of Elements and boron and silicon, and sintering the coated diamond particles under conditions of high pressure and high temperature, which sintered article consists of 70 to 99.8% by volume of diamond and 30 to 0.2% by volume of the carbide of the coating substance. A method for the production of the sintered article of diamond is also disclosed.

摘要翻译： 通过将金刚石颗粒的表面以基于金刚石颗粒和助剂的总体积的30至0.1体积％的表面的至少一种选自组中的过渡金属的组合来获得， 元素周期表中的4a，5a和6a以及硼和硅，并且在高压和高温条件下烧结涂覆的金刚石颗粒，该烧结制品由70至99.8体积％的金刚石和30至0.2％ 体积的涂层物质的碳化物。 还公开了用于生产金刚石烧结制品的方法。

公开(公告)号：US5177033A

公开(公告)日：1993-01-05

申请号：US703865

申请日：1991-05-21

申请人： Masanobu Awano ,  Michihide Machida ,  Hiroyoshi Takagi ,  Yuzi Hoshi ,  Masamichi Obitsu

发明人： Masanobu Awano ,  Michihide Machida ,  Hiroyoshi Takagi ,  Yuzi Hoshi ,  Masamichi Obitsu

IPC分类号： C01B33/26 ,  C03C10/08 ,  C04B35/195 ,  C04B35/645

CPC分类号： C04B35/6455 ,  C01B33/26 ,  C04B35/195

摘要： A light transmitting sintered body of cordierite has a composition equal or close to the stoichiometric composition of cordierite which is represented as 2MgO.2Al.sub.2 O.sub.3.5SiO.sub.2, consists mainly of a phase of cordierite crystals, and has a total transmittance of at least 20%. A method of preparing it is also disclosed.

公开(公告)号：US4365022A

公开(公告)日：1982-12-21

申请号：US317542

申请日：1981-11-02

申请人： Hideyo Tabata ,  Yoshitaka Kuwahara ,  Michihide Machida ,  Shyoichi Kume ,  Takeo Iga ,  Kazuo Saitoh ,  Shinji Tomura

发明人： Hideyo Tabata ,  Yoshitaka Kuwahara ,  Michihide Machida ,  Shyoichi Kume ,  Takeo Iga ,  Kazuo Saitoh ,  Shinji Tomura

IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/597 ,  C04B35/58

CPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/597

摘要： A high-strength sintered article of chemical substances having the .beta.-silicon nitride type crystal structure is produced by blending 50 to 99.9 weight percent of a .beta.-silicon nitride and/or .beta.'-Sialon and 50 to 0.1 weight percent of a mixture, as a sintering aid, consisting of BeO, Ga.sub.2 O.sub.3, and Al.sub.2 O.sub.3 in respective amounts such as to have a Ga.sub.2 O.sub.3 /BeO ratio in the range of from 2.8 to 9.4, an Al.sub.2 O.sub.3 /BeO ratio in the range of from 0.0 to 2.6, and an Al.sub.2 O.sub.3 /Ga.sub.2 O.sub.3 ratio in the range of from 0.0 to 1.1, all ratios being ratios by weight and sintering the resultant blend.

摘要翻译： 通过混合50-99.9重量％的β-氮化硅和/或β'-Sialon和50至0.1重量％的混合物来生产具有β-氮化硅型晶体结构的化学物质的高强度烧结制品， 作为烧结助剂，由BeO，Ga 2 O 3和Al 2 O 3组成，各自的量可以使得Ga 2 O 3 / BeO比在2.8〜9.4的范围内，Al 2 O 3 / BeO比在0.0〜2.6的范围内， Al 2 O 3 / Ga 2 O 3的比例在0.0至1.1的范围内，所有比例均为重量比，并烧结所得共混物。