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    Composite bearing structure
    3.
    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）。

    Slide member and method of manufacturing the same
    4.
    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。

    Silicon nitride sintered body and process for producing the same
    5.
    发明授权
    Silicon nitride sintered body and process for producing the same 失效
    氮化硅烧结体及其制造方法

    公开(公告)号：US5275772A

    公开(公告)日：1994-01-04

    申请号：US957506

    申请日：1992-10-05

    申请人： Takehisa Yamamoto ,  Takao Nishioka ,  Kenji Matsunuma ,  Akira Yamakawa ,  Masaya Miyake

    发明人： Takehisa Yamamoto ,  Takao Nishioka ,  Kenji Matsunuma ,  Akira Yamakawa ,  Masaya Miyake

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

    CPC分类号： C04B35/5935 ,  C04B35/597

    摘要： The present invention relates to a silicon nitride sintered body [wherein the composition of Si.sub.3 N.sub.4 -first aid (Y.sub.2 O.sub.3 +MgO)-second aid (at least one of Al.sub.2 O.sub.3 and AlN)] falls within a range defined by lines joining points A, B, C and D in FIG. 1, the crystal phase of the sintered body contains both .alpha.-Si.sub.3 N.sub.4 and .beta.'-sialon, and the relative density is 98% or more. This sintered body is produced by subjecting a green compact of the above-described source to primary sintering in a nitrogen gas atmosphere at 1300 to 1700.degree. C. so that the relative density reaches 96% or more, and the precipitation ratio of the .alpha.-Si.sub.3 N.sub.4 crystal phases to the .beta.'-sialon crystal phase in the sintered body is in the range of from 40:60 to 80:20; and then subjecting the primary sintered body to secondary sintering in a nitrogen gas atmosphere at 1300 to 1700.degree. C. so that the relative density reaches 98% or more. The sintered body has superior strength properties, especially at ordinary temperatures, and can be produced with a high productivity in a high yield at a low cost.

    摘要翻译： 本发明涉及一种氮化硅烧结体[其中，Si 3 N 4 - 急救（Y 2 O 3 + MgO） - 辅助剂（Al 2 O 3和AlN中的至少一种）的组成]落在由连接点A，B， C和D。 如图1所示，烧结体的结晶相含有α-Si 3 N 4和β'-Sialon，相对密度为98％以上。 该烧结体是通过使上述源的生坯在1300〜1700℃的氮气气氛中进行一次烧结而制成的，使得相对密度达到96％以上， Si3N4晶相与烧结体中的β' - 赛隆结晶相的比例范围为40:60至80:20; 然后在1300〜1700℃的氮气气氛中使一次烧结体进行二次烧结，使得相对密度达到98％以上。 该烧结体具有优异的强度特性，特别是在普通温度下，可以低成本高产率地以高生产率生产。

    Silicon nitride sintered body and process for producing the same
    7.
    发明授权
    Silicon nitride sintered body and process for producing the same 失效
    硅氮化物烧结体及其制造方法

    公开(公告)号：US5204297A

    公开(公告)日：1993-04-20

    申请号：US825989

    申请日：1992-01-27

    申请人： Takehisa Yamamoto ,  Takao Nishioka ,  Kenji Matsunuma ,  Akira Yamakawa ,  Masaya Miyake

    发明人： Takehisa Yamamoto ,  Takao Nishioka ,  Kenji Matsunuma ,  Akira Yamakawa ,  Masaya Miyake

    IPC分类号： C04B35/593 ,  C04B35/597

    CPC分类号： C04B35/5935 ,  C04B35/597

    摘要： The present invention relates to a silicon nitride sintered body [wherein the composition of Si.sub.3 N.sub.4 -first aid (Y.sub.2 O.sub.3 +MgO)-second aid (at least one of Al.sub.2 O.sub.3 and AlN)] falls within a range defined by lines joining points A, B, C and D in FIG. 1, the crystal phase of the sintered body contains both .alpha.-Si.sub.3 N.sub.4 and .beta.'-sialon, and the relative density is 98% or more. This sintered body is produced by subjecting a green compact of the above-described source to primary sintering in a nitrogen gas atmosphere at 1300.degree. to 1700.degree. C. so that the relative density reaches 96% or more, and the precipitation ratio of the .alpha.-Si.sub.3 N.sub.4 crystal phases to the .beta.'-sialon crystal phase in the sintered body is in the range of from 40:60 to 80:20; and then subjecting the primary sintered body to secondary sintering in a nitrogen gas atmosphere at 1300.degree. to 1700.degree. C. so that the relative density reaches 98% or more. The sintered body has superior strength properties, especially at ordinary temperatures, and can be produced with a high productivity in a high yield at a low cost.

    Silicon nitride sintered body and process for producing the same
    8.
    发明授权
    Silicon nitride sintered body and process for producing the same 失效
    硅氮化物烧结体及其制造方法

    公开(公告)号：US5173458A

    公开(公告)日：1992-12-22

    申请号：US810723

    申请日：1991-12-18

    申请人： Takao Nishioka ,  Kenji Matsunuma ,  Koichi Sogabe ,  Tomoyuki Awatsu ,  Masaya Miyake ,  Takehisa Yamamoto ,  Akira Yamakawa

    发明人： Takao Nishioka ,  Kenji Matsunuma ,  Koichi Sogabe ,  Tomoyuki Awatsu ,  Masaya Miyake ,  Takehisa Yamamoto ,  Akira Yamakawa

    IPC分类号： C04B35/593

    CPC分类号： C04B35/5935

    摘要： Disclosed is a silicon nitride sintered body produced by subjecting a green compact of a mixed powder composed of 1) a silicon nitride powder having a percentage .alpha. crystallization of 93% or more and a mean grain diameter of 0.7 .mu.m or less and 2) 5 to 15% by weight in total of a first sintering aid selected from among rare earth element, yttrium oxide and lanthanide oxides and a second sintering aid consisting of aluminum oxide or nitride and at least one selected from among oxides and nitrides of Mg, Ca and Li, to primary sintering in a nitrogen gas atmosphere under a pressure of 1.1 atm or less at 1500.degree. to 1700.degree. C.; and subjecting the sintered body to secondary sintering in a nitrogen gas atmosphere under a pressure of 10 atm or more at the primary sintering temperature or below, thereby giving a sintered body wherein the relative density of the sintered body is 99% or more and the precipitation ratio of an .alpha.-Si.sub.3 N.sub.4 (including .beta.'-sialon) crystal phase ranges from 1:3 to 1:8 in terms of the peak intensity ratio in X-ray diffraction.

    Silicon nitride composite sintered body and process for producing the same
    9.
    发明授权
    Silicon nitride composite sintered body and process for producing the same 失效
    氮化硅复合烧结体及其制造方法

    公开(公告)号：US5384292A

    公开(公告)日：1995-01-24

    申请号：US220457

    申请日：1994-03-31

    申请人： Jin-Joo Matsui ,  Osamu Komura ,  Akira Yamakawa ,  Masaya Miyake

    发明人： Jin-Joo Matsui ,  Osamu Komura ,  Akira Yamakawa ,  Masaya Miyake

    IPC分类号： C04B35/584 ,  C04B35/58

    CPC分类号： C04B35/584

    摘要： A silicon nitride composite sintered which comprises crystal grains of silicon nitride and/or sialon having an average minor axis length of 0.05 to 3 .mu.m and an aspect ratio of 10 or less and foreign particles dispersed in the crystal grains and/or the grain boundary phase, said particles having a thermal expansion coefficient of 5.times.10.sup.-6 /.degree.C. or more and an average particle size of 1 to 500 nm. The sintered body is produced by wet mixing silicon nitride powder, at least two sintering aids selected from among Y.sub.2 O.sub.3, Al.sub.2 O.sub.3, AlN and MgO and at least one compound selected from among the oxides, nitrides, carbides and silicides of the elements, excluding Si and C, of the groups IIa, IIIa, IVa, Va, VIa, IIb, IIIb and IVb of the Periodic Table to form a molding; and heat treating under the specified conditions. The sintered body can also be obtained by coating the surfaces of silicon nitride crystal grains with an organometallic compound convertible to the above foreign particles, heat treating and sintering with the sintering aid.

    摘要翻译： 一种氮化硅复合材料，其包含平均短轴长度为0.05〜3μm，长径比为10以下的氮化硅和/或赛隆的晶粒和分散在晶粒和/或晶界中的异物的氮化硅复合体 所述颗粒的热膨胀系数为5×10 -6 /℃以上，平均粒径为1〜500nm。 烧结体通过湿式混合氮化硅粉末，至少两种选自Y 2 O 3，Al 2 O 3，AlN和MgO的烧结助剂和选自元素的氧化物，氮化物，碳化物和硅化物中的至少一种化合物，除Si和 C，元素周期表IIa，IIIa，IVa，Va，VIa，IIb，IIIb和IVb族中的一种，形成一个成型体; 并在规定条件下进行热处理。 烧结体也可以通过用可转化为上述外来颗粒的有机金属化合物涂覆氮化硅晶粒表面，用烧结助剂进行热处理和烧结来获得。

    Ceramic adjusting shim
    10.
    发明授权
    Ceramic adjusting shim 失效
    陶瓷调节垫片

    公开(公告)号：US5372099A

    公开(公告)日：1994-12-13

    申请号：US174471

    申请日：1993-12-28

    申请人： Kenji Matsunuma ,  Takao Nishioka ,  Akira Yamakawa

    发明人： Kenji Matsunuma ,  Takao Nishioka ,  Akira Yamakawa

    IPC分类号： F01L1/14 ,  F01L1/16 ,  F01L1/20

    CPC分类号： F01L1/143 ,  F01L1/16 ,  F01L1/205 ,  Y10T74/2107

    摘要： The preset invention provides a ceramic adjusting shim capable of minimizing the abrasion of parts contacting the adjusting shim, for example, a cam and a tappet. The ceramic adjusting shim is produced from a ceramic material and has a surface roughness of 0.05 to 0.2 .mu.m in ten-point average roughness Rz.

    摘要翻译： 本发明提供一种陶瓷调节垫片，其能够最小化与调节垫片接触的部件的磨损，例如凸轮和挺杆。 陶瓷调节垫片由陶瓷材料制成，并且在十点平均粗糙度Rz中具有0.05至0.2μm的表面粗糙度。