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    Electrically-conductive sintered compact of silicon nitride machinable by electrical discharge machining and process of producing the same
    11.
    发明授权
    Electrically-conductive sintered compact of silicon nitride machinable by electrical discharge machining and process of producing the same 失效
    通过放电加工可加工的氮化硅导电性烧结体及其制造方法

    公开(公告)号：US4659508A

    公开(公告)日：1987-04-21

    申请号：US794675

    申请日：1985-11-04

    申请人： Matsuo Higuchi ,  Masaya Miyake ,  Hisao Takeuchi ,  Eiji Kamijo

    发明人： Matsuo Higuchi ,  Masaya Miyake ,  Hisao Takeuchi ,  Eiji Kamijo

    IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/58 ,  C04B35/56

    CPC分类号： C04B35/584 ,  C04B35/593

    摘要： An electrically-conductive sintered compact of silicon nitride which is machinable by electrical discharge machining and a process to produce the same. TiN and/or TiC powder is added to a powder of silicon nitride in an amount 15-40% by volume to act as a conductivity-supplying agent while 0.01-3.0% by volume MgO and/or Al.sub.2 O.sub.3 powder is added as a sintering assistant. The mixed powders are then preformed in a desired shape and sintered in a nonoxidizing environment at 1,600.degree. C.-2,000.degree. C. to obtain a compact of silicon-nitride machinable by electrical discharge machining due to its electrical conductivity being at least 1 S.multidot.cm.sup.-1.

    摘要翻译： 可通过放电加工机加工的氮化硅导电烧结体及其制造方法。 将TiN和/或TiC粉末加入15-40体积％的氮化硅粉末中，作为导电性供给剂，同时添加0.01-3.0体积％的MgO和/或Al 2 O 3粉末作为烧结助剂 。 然后将混合粉末预成形为所需形状，并在1600℃-2000℃的非氧化环境中烧结，得到可通过放电加工机加工的氮化硅致密体，因为其导电率至少为1Sxcm- 1。

    Ceramic insert for use with clamp type cutting tool
    12.
    发明授权
    Ceramic insert for use with clamp type cutting tool 失效
    陶瓷刀片用于夹紧式切割工具

    公开(公告)号：US6017172A

    公开(公告)日：2000-01-25

    申请号：US150037

    申请日：1998-09-09

    申请人： Harutoshi Ukegawa ,  Matsuo Higuchi ,  Shingo Hirota ,  Nobuyuki Kitagawa

    发明人： Harutoshi Ukegawa ,  Matsuo Higuchi ,  Shingo Hirota ,  Nobuyuki Kitagawa

    IPC分类号： B23B27/16 ,  C04B35/593 ,  B23B27/22

    CPC分类号： C04B35/5935 ,  B23B27/1651 ,  B23B2200/088 ,  Y10T407/23 ,  Y10T407/26 ,  Y10T407/27

    摘要： The ceramic insert made from a silicon nitride ceramic material and formed with a recess for fastening in the center of its rake face. The recess has a surface roughness Rmax not exceeding 4 .mu.m. The angle between a side face of the recess and a centerline perpendicular to the rake face of the insert is 50-70 degrees. The ratio of the diameter of the recess to the diameter of a circle inscribing the perimeter of the rake face is 30-85%. The recess has a flat or curved bottom. The connecting portion between the side face and the bottom of the recess forms a smoothly curved surface.

    摘要翻译： 陶瓷插件由氮化硅陶瓷材料制成，并形成有用于紧固在其前刀面中心的凹槽。 凹部的表面粗糙度Rmax不超过4μm。 凹部的侧面与垂直于刀片的前刀面的中心线之间的角度为50-70度。 凹槽的直径与刻边面周长的圆的直径的比例为30-85％。 凹槽具有平坦或弯曲的底部。 凹槽的侧面和底部之间的连接部分形成平滑的曲面。

    Composite bearing structure
    13.
    发明授权
    Composite bearing structure 失效
    复合轴承结构

    公开(公告)号：US5675201A

    公开(公告)日：1997-10-07

    申请号：US295623

    申请日：1994-08-24

    申请人： Osamu Komura ,  Tetsuya Katayama ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    发明人： Osamu Komura ,  Tetsuya Katayama ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    IPC分类号： F16C17/02 ,  F16C32/00 ,  F16C32/04 ,  F16C33/10 ,  F16C33/24 ,  F16C39/06 ,  H02K7/08 ,  H02K7/09

    CPC分类号： F16C32/0427 ,  F16C17/107 ,  F16C32/0431 ,  F16C33/107 ,  F16C39/063

    摘要： A composite bearing structure that has a high rotational accuracy and that can withstand high-speed rotation comprises first bearing means, second bearing means, third bearing means and fourth bearing means. The first bearing means supports a radial impact force which is applied to a rotator during rotation, and is formed by an inner ring (1) and an outer ring (2) consisting of silicon nitride ceramics sintered bodies. The second bearing means supports an axial load which is applied to the rotator while maintaining a prescribed clearance with the rotator, and is formed by a magnetic bearing body of two permanent magnets (12) and (13) which are thrust-directionally opposed to each other. The third bearing means maintains the radial rotational accuracy of the rotator, and is formed by a radial dynamic pressure producing groove (5) which is formed in a cylindrical surface of the inner ring (1). The fourth bearing means maintains the thrust-directional rotational accuracy of the rotator, and is formed by an air dome portion (100) which is confined in a semi-closed state by the inner ring (1), the outer ring (2) and a cover (4).

    摘要翻译： PCT No.PCT / JP94 / 00002 Sec。 371日期：1994年8月24日 102（e）日期1994年8月24日PCT 1994年1月4日PCT PCT。 公开号WO94 / 16233 PCT 日期1994年7月21日具有高旋转精度并能承受高速旋转的复合轴承结构包括第一轴承装置，第二轴承装置，第三轴承装置和第四轴承装置。 第一轴承装置支撑在旋转期间施加到旋转器的径向冲击力，并且由内环（1）和由氮化硅陶瓷烧结体组成的外圈（2）形成。 第二轴承装置支撑轴向载荷，该轴向载荷与旋转体保持规定的间隙，并且由两个永磁体（12）和（13）的磁轴承体形成，该永磁体与每个 其他。 第三轴承装置维持旋转体的径向旋转精度，并且由形成在内圈（1）的圆柱形表面中的径向动压产生槽（5）形成。 第四轴承装置保持旋转体的推力定向旋转精度，并且由内圈（1），外圈（2）和外圈（1）限定在半闭合状态的空气圆顶部（100）形成， 盖（4）。

    Sintered silicon nitride-based body
    14.
    发明授权
    Sintered silicon nitride-based body 失效
    烧结氮化硅基体

    公开(公告)号：US5631200A

    公开(公告)日：1997-05-20

    申请号：US597705

    申请日：1996-02-07

    申请人： Harutoshi Ukegawa ,  Matsuo Higuchi

    发明人： Harutoshi Ukegawa ,  Matsuo Higuchi

    IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/597 ,  C04B35/599 ,  C04B41/00 ,  C04B35/587

    CPC分类号： C04B41/009 ,  C04B35/5935 ,  C04B35/597 ,  C04B41/0072

    摘要： A sintered silicon nitride-based body comprising 20% or less by weight of a grain boundary phase and the balance being a major phase of grains of silicon nitride and/or sialon, wherein the major phase contains a grain phase of a .beta.-Si.sub.3 N.sub.4 phase and/or a .beta.'-sialon phase, and a quantitative ratio of the grain phase of the .beta.-Si.sub.3 N.sub.4 phase and/or the .beta.'-sialon phase is in a range of 0.5 to 1.0 relative to the major phase; the grain boundary phase contains Re.sub.2 Si.sub.2 O.sub.7 (wherein Re represents a rare-earth element other than Er and Yb) as a first crystal component and at least one of ReSiNO.sub.2, Re.sub.3 Al.sub.5 O.sub.12, ReAlO.sub.3, and Si.sub.3 N.sub.4.Y.sub.2 O.sub.3 as a second crystal component; and a quantitative ratio of the first and second crystal components in the grain boundary phase to the grain phase of .beta.-Si.sub.3 N.sub.4 phase and/or the .beta.'-sialon phase ranges from 0.03 to 1.6. The sintered body is produced by mixing a specific sintering aid and silicon nitride-based powder, sintering the mixture and heat treating the sintered body for nucleation and crystal growth within the temperature range of from 1050.degree. to 1550.degree. C.

    摘要翻译： 一种烧结氮化硅基体，其包含20重量％或更少的晶界相，余量为氮化硅和/或赛隆的晶粒的主相，其中主相含有β-Si 3 N 4相的晶相 和/或β' - 赛隆相，β-Si 3 N 4相和/或β' - 赛隆相的晶相的定量比例相对于主相为0.5〜1.0的范围。 晶界相包含作为第一结晶成分的Re 2 Si 2 O 7（其中，Re表示除Er和Yb以外的稀土元素）和作为第二结晶成分的ReSiNO 2，Re 3 Al 5 O 12，ReAlO 3和Si 3 N 4 O 2 y 2中的至少一种; 并且晶界相中的第一和第二晶体组分与β-Si 3 N 4相和/或β' - 赛隆相的晶相的定量比为0.03至1.6。 烧结体通过混合特定的烧结助剂和氮化硅基粉末，烧结混合物并在1050℃至1550℃的温度范围内对烧结体进行成核和晶体生长进行热处理。

    Slide member and method of manufacturing the same
    15.
    发明授权
    Slide member and method of manufacturing the same 失效
    滑动构件及其制造方法

    公开(公告)号：US5543371A

    公开(公告)日：1996-08-06

    申请号：US150189

    申请日：1993-11-30

    申请人： Tetsuya Katayama ,  Kaoru Murabe ,  Osamu Komura ,  Chihiro Kawai ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    发明人： Tetsuya Katayama ,  Kaoru Murabe ,  Osamu Komura ,  Chihiro Kawai ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    IPC分类号： C04B35/01 ,  C04B35/584 ,  C04B35/593 ,  C04B41/00 ,  C04B41/80 ,  F16C33/04 ,  F16C33/16 ,  C04B35/587

    CPC分类号： C04B41/009 ,  C04B35/01 ,  C04B35/584 ,  C04B35/593 ,  C04B35/5935 ,  C04B41/0072 ,  C04B41/80 ,  F16C33/043 ,  F16C33/16 ,  C04B2111/00353 ,  Y10T428/252 ,  Y10T428/2991 ,  Y10T428/30

    摘要： A slide member has a sliding surface made of ceramic and has a surface roughness of not more than 1.0 .mu.m in center line average roughness Ra. ceramic includes a silicon nitride sintered body, which contains crystal grains having a linear density of at least 35 per 30 .mu.m in length with a boundary phase volume ratio of not more than 15 volume %, and which contains pores of not more than 20 .mu.m in maximum diameter in a content of not more than 3%. In a method of manufacturing the slide member, it is possible to ensure smoothness of the sliding surface by grinding the sliding surface and thereafter heating the ceramic in either inert gas or an atmospheric air. A slide member that can be used under severe sliding conditions of high-speed sliding or the like and that has excellent wear resistance is obtained. Even if the slide member is used for a sliding part of a compressor or the like which employs a fluorocarbon containing no chlorine as a cooling medium, it is possible to prevent the occurrence of seizure and abnormal wear on the sliding surface.

    摘要翻译： PCT No.PCT / JP93 / 00385 Sec。 371日期：1993年11月30日 102（e）日期1993年11月30日PCT 1993年3月29日PCT公布。 公开号WO93 / 2002500 日期：1993年10月14日滑动部件具有由陶瓷制成的滑动面，中心线平均粗糙度Ra的表面粗糙度不大于1.0μm。 陶瓷包括氮化硅烧结体，其包含长度为30μm以上的线密度为35以上，边界相体积比为15体积％以下，并且含有不大于20μm的孔的晶粒 m最大直径，含量不超过3％。 在制造滑动构件的方法中，可以通过研磨滑动表面并随后在惰性气体或大气中加热陶瓷来确保滑动表面的平滑度。 可以获得可以在高速滑动等的严酷滑动条件下使用且具有优异的耐磨性的滑动构件。 即使将滑动部件用于使用不含氯的碳氟化合物作为冷却介质的压缩机等的滑动部件，也可以防止滑动面发生卡滞和异常磨损。

    Method of hot rolling copper
    16.
    发明授权
    Method of hot rolling copper 失效
    热轧铜的方法

    公开(公告)号：US4777822A

    公开(公告)日：1988-10-18

    申请号：US127592

    申请日：1987-12-03

    申请人： Ikuji Uemura ,  Fumio Ono ,  Eiji Kamijo ,  Tatsuya Nishimoto ,  Matsuo Higuchi

    发明人： Ikuji Uemura ,  Fumio Ono ,  Eiji Kamijo ,  Tatsuya Nishimoto ,  Matsuo Higuchi

    IPC分类号： C04B35/584 ,  C04B35/597 ,  B21B27/00

    CPC分类号： C04B35/597 ,  C04B35/584

    摘要： The present invention relates to a method of hot rolling copper or copper alloys such as copper wires and coppr plates. The present invention has succeeded in remarkably prolonging useful life of the tools used for hot rolling, and improving the surface quality of the rolled products by replacing the conventional methods of hot rolling copper using tools made of cemented carbide, die steel, high-speed steel, etc. by a method using tolls made essentially of Si.sub.3 N.sub.4. Si.sub.3 N.sub.4 tools used in the present invention contain at least one kind of sintering aid selected from the group consisting of Al.sub.2 O.sub.3, AlN, MgO, Y.sub.2 O.sub.3 and ZrO.sub.2, have a sintering density of 90% or more, Rockwell hardness of 88 or more and an average particle diameter of 2.mu. or less, and contain .beta.-type Si.sub.3 N.sub.4 as a main ingredient.

    摘要翻译： 本发明涉及一种热轧铜或铜合金如铜线和铜板的方法。 本发明成功地延长了用于热轧的工具的使用寿命，并且通过使用由硬质合金，模具钢，高速钢制成的工具代替热轧铜的常规方法来提高轧制品的表面质量 等等，通过使用基本上由Si 3 N 4制成的费用的方法。 本发明中使用的Si 3 N 4工具包含至少一种选自Al 2 O 3，AlN，MgO，Y 2 O 3和ZrO 2的烧结助剂，烧结密度为90％以上，洛氏硬度为88以上，平均粒径为 粒径为2μm以下，含有β型Si 3 N 4为主要成分。

    Process for the production of ceramics
    17.
    发明授权
    Process for the production of ceramics 失效
    陶瓷生产工艺

    公开(公告)号：US4702869A

    公开(公告)日：1987-10-27

    申请号：US920908

    申请日：1986-10-17

    申请人： Matsuo Higuchi ,  Osamu Komura ,  Eiji Kamijo

    发明人： Matsuo Higuchi ,  Osamu Komura ,  Eiji Kamijo

    IPC分类号： C04B35/565 ,  C04B35/584 ,  C04B35/64 ,  C04B33/32

    CPC分类号： C04B35/584 ,  C04B35/565 ,  C04B35/64

    摘要： Less dispersion and more homogenized ceramics are produced by sintering ceramic materials, in particular, containing silicon nitride or silicon carbide as a predominant component with other assistants or additives, machining the surface of the resulting sintered compact and then subjecting the sintered compact to a heat treatment for homogenizing in a non-oxidizing atmosphere such as nitrogen or argon gas at a temperature of from the mass-transfer temperature at which the mass-transfer takes place in the interior of the ceramics to blunt the fine point of a crack to the sintering temperature of the ceramics.

    摘要翻译： 通过烧结陶瓷材料，特别是将氮化硅或碳化硅作为主要成分与其它辅助剂或添加剂进行烧结来制备较少的分散体和更均质化的陶瓷，对所得烧结体的表面进行机械加工，然后对烧结体进行热处理 在非氧化性气氛如氮气或氩气中，在陶瓷内部发生质量传递的质量传递温度，使裂纹的细微点钝化至烧结温度 的陶瓷。