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.

公开(公告)号：US4764490A

公开(公告)日：1988-08-16

申请号：US849330

申请日：1986-04-08

申请人： Akira Yamakawa ,  Masaya Miyake ,  Takao Nishioka

发明人： Akira Yamakawa ,  Masaya Miyake ,  Takao Nishioka

IPC分类号： C04B35/626 ,  C04B35/584 ,  C04B35/593 ,  C04B35/58

CPC分类号： C04B35/584 ,  C04B35/5935

摘要： Disclosed is a process for preparation of a sintered silicon nitride. The process comprises the steps of:mixing a powder of silicon nitride with a powder of a sintering agent;compacting the obtained mixture; andsintering the compacted mixture in a non-oxidizing atmosphere.The feature of the process is that the powder of the sintering agent includes a powder mixture of oxide and/or hydroxide of at least two kinds of metals which has been prepared by co-precipitation.Due to the use of the co-precipitated powder as the sintering agent, it is possible to obtain a sintered silicon nitride having an excellent strength and uniformity in quality. The obtained sintered silicon nitride is preferably used as an engineering ceramic.

摘要翻译： 公开了一种制备氮化硅烧结体的方法。 该方法包括以下步骤：将氮化硅粉末与烧结剂粉末混合; 压实得到的混合物; 并在非氧化气氛中烧结压实的混合物。 该方法的特征在于，烧结剂的粉末包含通过共沉淀制备的至少两种金属的氧化物和/或氢氧化物的粉末混合物。 由于使用共沉淀粉末作为烧结剂，可以获得质量优异的强度和均匀性的烧结氮化硅。 得到的烧结氮化硅优选用作工程陶瓷。

公开(公告)号：US5961907A

公开(公告)日：1999-10-05

申请号：US920452

申请日：1997-08-29

申请人： Masamichi Yamagiwa ,  Akira Yamakawa ,  Takao Nishioka ,  Takashi Matsuura

发明人： Masamichi Yamagiwa ,  Akira Yamakawa ,  Takao Nishioka ,  Takashi Matsuura

IPC分类号： F16C33/24 ,  C04B35/584 ,  C04B35/593 ,  C04B41/80 ,  F01L1/14 ,  F01L3/02 ,  F16C33/04 ,  B29C49/00

CPC分类号： C04B35/593 ,  F01L1/14 ,  F01L3/02 ,  F16C33/043 ,  F01L2105/02

摘要： A silicon nitride ceramic sliding member which includes Si.sub.3 N.sub.4 grains as a main component and is shaped or controlled in dimensions through hot plastic working wherein the Si.sub.3 N.sub.4 particles mainly includes .beta.-type columnar crystal grains. The ceramic sliding member is produced by the step (I) of preparing a preform made of silicon nitride ceramic sintered body including Si.sub.3 N.sub.4 grains as a main component wherein the average grain size (average grain size in minor axis in the case of .beta.-type columnar crystal grains) of the Si.sub.3 N.sub.4 grains is at most 0.5 .mu.m, and the hot plastic working step (II) of placing the preform in a mold and effecting hot plastic deformation of the preform for shaping or dimensional control thereof while simultaneously increasing the average aspect ratio of the .beta.-type columnar crystal grains. The resultant sliding member has excellent sliding properties, a high mechanical strength and a high reliability at a low cost without resort to grinding or the like for shaping thereof.

摘要翻译： 一种氮化硅陶瓷滑动构件，其包括Si 3 N 4晶粒作为主要成分，并通过热塑性加工成型或尺寸控制，其中Si 3 N 4颗粒主要包括β型柱状晶粒。 陶瓷滑动构件是通过制备由包含Si 3 N 4晶粒作为主要成分的氮化硅陶瓷烧结体制成的预制件的步骤（I）制备的，其中平均晶粒度（在β型柱状的情况下为短轴的平均晶粒尺寸 Si3N4晶粒的晶粒度为0.5μm以下，热塑性加工工序（II）将预成型体放置在模具中，并对预制件进行热塑性变形以进行成形或尺寸控制，同时增加平均面积 β型柱状晶粒的比例。 所得的滑动构件具有优异的滑动性能，高机械强度和高可靠性，而不需要用于成型的研磨等。

公开(公告)号：US5783314A

公开(公告)日：1998-07-21

申请号：US716446

申请日：1996-09-19

申请人： Masamichi Yamagiwa ,  Takao Nishioka ,  Hisao Takeuchi ,  Akira Yamakawa

发明人： Masamichi Yamagiwa ,  Takao Nishioka ,  Hisao Takeuchi ,  Akira Yamakawa

IPC分类号： F01L1/14 ,  B32B18/00 ,  B32B15/00 ,  C21D1/00

CPC分类号： F01L1/143 ,  Y10T428/12576

摘要： This invention aims at providing a sliding component having a crowning shape formed by applying surface quenching treatment to a portion made of a steel, and a production method thereof. The shape and the quantity of crowning can be controlled by heat-treatment or machining after the surface quenching. The sliding component may be made of a steel alone, or may be formed in such a manner that at least one portion of members forming the crowning-shaped sliding face by the surface quenching is joined or fitted to a sliding component main body made of the steel, and its material is a ceramic.

摘要翻译： PCT No.PCT / JP96 / 01660 Sec。 371日期1996年9月19日 102（e）1996年9月19日PCT PCT 1996年6月17日PCT公布。 出版物WO97 / 00374 日本1997年1月3日本发明旨在提供一种具有通过对钢制成的部分进行表面淬火处理形成的隆起形状的滑动部件及其制造方法。 凸面的形状和数量可以通过表面淬火后的热处理或机械加工来控制。 滑动部件可以由单独的钢制成，或者可以这样形成：通过表面淬火形成凸面状滑动面的部件的至少一部分接合或嵌合到由 钢，其材料是陶瓷。

公开(公告)号：US5720917A

公开(公告)日：1998-02-24

申请号：US638587

申请日：1996-04-29

申请人： Takashi Matsuura ,  Takao Nishioka ,  Akira Yamakawa

发明人： Takashi Matsuura ,  Takao Nishioka ,  Akira Yamakawa

IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/64

CPC分类号： C04B35/584 ,  C04B35/593

摘要： The invention aims to offer a method to manufacture a high-strength, high-reliability and low cost silicon nitride based sintered body which is not affected by the amount of metal impurities contained in the silicon nitride powder, without using high-purity silicon nitride powder, and can be sintered for a short sintering time. The invention uses silicon nitride and sintering aids, and the powder mixture containing 500-5000 ppm metal impurities is sintered at temperatures ranging from 1300.degree.-1900.degree. C., and under the conditions wherein the product of sintering temperature and sintering time ranges from 1.times.10.sup.5 to 10.times.10.sup.5 .degree. C. .multidot.seconds.

摘要翻译： 本发明旨在提供一种制造高强度，高可靠性和低成本的氮化硅基烧结体的方法，其不受氮化硅粉末中所含的金属杂质的量的影响，而不使用高纯氮化硅粉末 并且可以在短的烧结时间下烧结。 本发明使用氮化硅和烧结助剂，并且将含有500-5000ppm金属杂质的粉末混合物在1300-119℃的温度下烧结，并且在烧结温度和烧结时间范围为1×10 5 至10×105℃×秒。

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。

公开(公告)号：US5358797A

公开(公告)日：1994-10-25

申请号：US911914

申请日：1992-07-10

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

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

IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/597 ,  C04B35/599 ,  C04B38/00 ,  F01L1/14 ,  F01L1/16 ,  F01L1/20

CPC分类号： C04B35/593 ,  C04B35/597 ,  F01L1/143 ,  F01L1/16 ,  F01L1/205 ,  Y10T428/265

摘要： The present invention provides an improved adjusting shim used in a valve train for an internal combustion engine for an automobile. The adjusting shim produced from a base material consisting of a ceramic material containing 80 to 98 wt. % of silicon nitride and/or sialon and has a porosity of not more than 3%, a bending strength of not less than 1.0 GPa and an impact compressive elastic limit (Hugoniot elastic limit) of not less than 15 GPa, wherein the base material is provided on the surface thereof which contacts a cam with a ceramic surface layer having a composition different from that of the base material and a hardness lower than that of the base material. The adjusting shim of the present invention enables a power loss of a valve train to be minimized; the abrasion resistance thereof to be improved; and the fuel economy, the performance and durability of an internal combustion engine to be improved.

摘要翻译： 本发明提供一种用于汽车内燃机的气门机构中使用的改进的调节垫片。 由由含有80〜98重量％的陶瓷材料构成的基材制成的调整垫片 ％的氮化硅和/或赛隆，并且具有不大于3％的孔隙率，不小于1.0GPa的弯曲强度和不小于15GPa的冲击压缩弹性极限（Hugoniot弹性极限）），其中所述基材 在其表面上设置有与具有不同于基材的组成的陶瓷表面层的凸轮接触，并且硬度低于基材的硬度。 本发明的调节垫片能够使气门机构的功率损失最小化; 其耐磨性得到提高; 并且燃料经济性，内燃机的性能和耐久性得到改善。

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。

公开(公告)号：US08878642B2

公开(公告)日：2014-11-04

申请号：US13502985

申请日：2011-05-16

申请人： Tomoyuki Ueno ,  Takao Nishioka

发明人： Tomoyuki Ueno ,  Takao Nishioka

IPC分类号： H01F27/24

CPC分类号： H01F1/24 ,  H01F3/08 ,  H01F27/255 ,  H01F41/0246

摘要： There are provided a dust core in which, even if the surface of a heat-treated compact is ground, the insulation between soft magnetic particles on the ground surface can be ensured in the grinding step, and a method for producing the dust core.The method includes a preparation step of preparing a heat-treated compact 100 by compacting soft magnetic particles having an insulation coating and heating the resultant compact to a predetermined temperature; and a machining step of removing part of the heat-treated compact 100 using a working tool 2. The machining step is performed while an electric current is supplied with a conductive fluid 7L between the heat-treated compact 100 serving as an anode and a working tool 2 that machines the heat-treated compact 100 or a first counter electrode 5 that faces the working tool 2 with a distance therebetween, the working tool 2 or the first counter electrode 5 serving as a cathode. A bridge portion that connects soft magnetic particles to each other is removed through the supply of an electric current, the soft magnetic particles being adjacent to each other along a machined surface of the heat-treated compact 100.

摘要翻译： 提供了一种防尘芯，其中即使热处理压块的表面被研磨，也可以在研磨步骤中确保地面上的软磁性颗粒之间的绝缘性，以及制造压粉芯的方法。 该方法包括通过压制具有绝缘涂层的软磁性颗粒并将所得到的压块加热到预定温度来制备热处理压块100的制备步骤; 以及使用加工工具2去除热处理压块100的一部分的加工步骤。在向作为阳极的热处理压块100和工作时的导电流体7L供给电流的同时进行加工步骤 将热处理压块100或面向加工工具2的第一对置电极5与其间距离加工的工具2，工作工具2或第一对电极5用作阴极。 通过供给电流来除去将软磁性体彼此连接的桥接部，沿着热处理成形体100的加工面彼此相邻的软磁性体。

公开(公告)号：US07621689B2

公开(公告)日：2009-11-24

申请号：US12074220

申请日：2008-02-29

申请人： Takao Nishioka ,  Yoshihiro Moto

发明人： Takao Nishioka ,  Yoshihiro Moto

IPC分类号： B25G3/18 ,  F16B21/00 ,  F16D1/00

CPC分类号： E02F3/3622 ,  E02F3/365 ,  Y10S37/903 ,  Y10T403/59 ,  Y10T403/591 ,  Y10T403/595 ,  Y10T403/599

摘要： An attachment coupler is attached to an end of an arm of a working machine. An attachment having two attachment pins in parallel can be detachably attached to the attachment coupler. The attachment coupler includes a first U-shaped portion that engages with and supports one of the attachment pins sideways, and a second U-shaped portion that receives the other attachment pin downwardly. The second U-shaped portion includes a rotary hook that opens and closes the opening of the second U-shaped portion. The rotary hook includes an engagement securing member that engages with and secures the rotary hook when the rotary hook closes the opening of the second U-shaped portion and when the rotary hook opens the opening of the second U-shaped portion, and a bolt securing member that secures the rotary hook with a bolt when the rotary hook closes the opening of the second U-shaped portion.

摘要翻译： 附接联接器附接到工作机械的臂的端部。 具有两个平行的附接销的附件可以可拆卸地附接到附接联接器。 附接联接器包括与第一U形部分和第二U形部分，第一U形部分与第二U形部分接合并且支撑其中一个附接销侧向;以及第二U形部分，其将另一个附接销向下接收。 第二U形部分包括打开和关闭第二U形部分的开口的旋转钩。 旋转钩包括接合固定构件，当旋转钩闭合第二U形部分的开口并且当旋转钩打开第二U形部分的开口时，接合固定构件与旋转钩接合并固定，并且螺栓固定 当旋转钩关闭第二U形部分的开口时，用螺栓固定旋转钩的构件。