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21. 发明授权

US5622905A Silicon nitride based sintered body 失效
标题翻译：氮化硅基烧结体
公开(公告)号：US5622905A
公开(公告)日：1997-04-22
申请号：US269021
申请日：1994-06-30
申请人： Takashi Matsuura , Akira Yamakawa , Masaya Miyake
发明人： Takashi Matsuura , Akira Yamakawa , Masaya Miyake
IPC分类号： C04B35/584 , C04B35/64 , C04B35/587 , C04B35/599
CPC分类号： C04B35/64 , C04B35/584
摘要： Discloses a silicon nitride based sintered body composed only of uniform, fine crystal grains, and improved in both strength and fracture toughness in the middle and low temperature ranges. A crystalline silicon nitride powder composed of crystal grains whose longer-axis diameter is not more than 200 nm or an amorphous silicon nitride powder is used as material powder. The silicon nitride powder is sintered at a temperature of 1200.degree. C. to 1400.degree. C. or sintered with a product of sintering temperature (.degree. C.) and sintering time (sec) below 600000 (.degree. C..multidot.sec) at a temperature of 1400.degree. C. to 1900.degree. C. Thus, a silicon nitride based sintered body in which the longer-axis diameter of silicon nitride and/or sialon crystals is not more than 200 nm is obtained.
摘要翻译：公开了仅由均匀的细晶粒组成的氮化硅基烧结体，并且在中低温范围内提高了强度和断裂韧性。使用由长轴径不大于200nm的晶粒构成的结晶氮化硅粉末或非晶氮化硅粉末作为原料粉末。氮化硅粉末在1200℃至1400℃的温度下烧结，或烧结温度（℃）和烧结时间（秒）低于600000℃（℃）的产物在温度为 1400℃〜1900℃。因此，得到氮化硅和/或赛隆晶体的长径比不大于200nm的氮化硅系烧结体。

22. 发明授权

US5384292A Silicon nitride composite sintered body and process for producing the same 失效
标题翻译：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。

23. 发明授权

US5346869A Sintered silicon nitride bodies suitable for use as high impact materials 失效
标题翻译：适用于高冲击材料的烧结氮化硅体
公开(公告)号：US5346869A
公开(公告)日：1994-09-13
申请号：US175490
申请日：1993-12-29
申请人： Takao Nishioka , Takehisa Yamamoto , Kenji Matsunuma , Akira Yamakawa , Masaya Miyake
发明人： Takao Nishioka , Takehisa Yamamoto , Kenji Matsunuma , Akira Yamakawa , Masaya Miyake
IPC分类号： C04B35/584 , C04B35/593 , C04B35/597 , F01L1/20 , F02B3/06 , F02F7/00 , C04B35/58
CPC分类号： C04B35/584 , C04B35/5935 , C04B35/597 , F01L1/205 , F02F7/0087 , F02B3/06 , F05C2203/0895
摘要： Described are sintered silicon nitride bodies useful as materials for parts required to have strength, especially excellent impact strength for items such as automobile parts and machine parts. The sintered Si.sub.3 N.sub.4 bodies contain 80-98 wt. % of silicon nitride and have a porosity not higher than 3% and an shock compressive elasticity limit of at least 15 GPa.
摘要翻译：描述了可用作对于诸如汽车部件和机器部件的物品具有强度，特别优异的冲击强度的部件的材料的烧结氮化硅体。烧结的Si 3 N 4体含有80-98wt。％的氮化硅，并且具有不高于3％的孔隙率和至少15GPa的冲击压缩弹性极限值。

24. 发明授权

US4994418A Ceramic compact and a process for the production of the same 失效
标题翻译：陶瓷紧凑件和生产过程相同
公开(公告)号：US4994418A
公开(公告)日：1991-02-19
申请号：US453158
申请日：1989-12-18
申请人： Akira Yamakawa , Yoshihiko Doi , Masaya Miyake
发明人： Akira Yamakawa , Yoshihiko Doi , Masaya Miyake
IPC分类号： C04B35/58 , C04B35/584 , C04B35/591 , C04B35/80
CPC分类号： C04B35/584 , C04B35/591 , C04B35/806
摘要： A ceramic compact having a more excellent high temperature strength, toughness and reliability, which comprises a silicon nitride matrix and ceramic fibers uniformly dispersed in the matrix and orientated in a desired direction, said matrix and fibers being closely bonded by sintering, is provided. This compact is produced, for example, by preparing a shaped body of silicon in which ceramic fibers are uniformly dispersed and then bearing and nitriding the shaped body in a nitrogen atmosphere to form a fiber-reinforced silicon nitride sintered compact.

25. 发明授权

US4769350A Silicon nitride sintered material for cutting tools and process for making the same 失效
标题翻译：用于切削刀具的氮化硅烧结材料及其制造方法
公开(公告)号：US4769350A
公开(公告)日：1988-09-06
申请号：US102922
申请日：1987-09-30
申请人： Takao Nishioka , Akira Yamakawa , Masaya Miyake
发明人： Takao Nishioka , Akira Yamakawa , Masaya Miyake
IPC分类号： C04B35/584 , C04B35/593 , C04B35/58
CPC分类号： C04B35/584 , C04B35/593
摘要： A silicon nitride sintered material for cutting tools comprising from about 3 to 10 wt % of partially stablized zirconium oxide, from about 1 to 5 wt % of aluminum oxide, and from about 1 to 10 wt % of yttrium oxide, the balance being silicon nitride, and the process for making the same.

26. 发明授权

US5675201A Composite bearing structure 失效
标题翻译：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）。

27. 发明授权

US5543371A Slide member and method of manufacturing the same 失效
标题翻译：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。

28. 发明授权

US5262366A Formation of a ceramic composite by centrifugal casting 失效
标题翻译：通过离心铸造形成陶瓷复合材料
公开(公告)号：US5262366A
公开(公告)日：1993-11-16
申请号：US602851
申请日：1990-10-26
申请人： Akira Yamakawa , Yoshihiko Doi , Masaya Miyake
发明人： Akira Yamakawa , Yoshihiko Doi , Masaya Miyake
IPC分类号： C04B35/584 , C04B35/591 , C04B35/80 , C04B35/58 , C04B35/76
CPC分类号： C04B35/591 , C04B35/584 , C04B35/806
摘要： A ceramic compact having excellent high temperature strength, toughness and reliability, which comprises a matrix preferably composed predominantly of silicon nitride and ceramic fibers uniformly dispersed in the matrix and orientated in a desired direction, said matrix and fibers being closely bonded by sintering. This compact is produced, for example, by preparing a shaped body of silicon, for example, in which ceramic fibers are uniformly dispersed by centrifugal casting and then heating and nitriding the shaped body in a nitrogen atmosphere to form a fiber-reinforced silicon nitride sintered compact. The ceramic fibers may include such fibers as aluminum oxide or silicon carbide fibers. Sintering assistants, such as silicon nitride, may be used to prepare the sintered compact.
摘要翻译：具有优异的高温强度，韧性和可靠性的陶瓷压块，其包含优选主要由氮化硅组成的基体和均匀分散在基体中并沿所需方向取向的陶瓷纤维的所述基体和纤维通过烧结紧密结合。该压坯例如通过制备例如通过离心铸造均匀分散陶瓷纤维然后在氮气气氛中加热和氮化成形体的硅成形体来制造，以形成纤维增强的氮化硅烧结体紧凑。陶瓷纤维可以包括诸如氧化铝或碳化硅纤维的纤维。可以使用诸如氮化硅的烧结助剂来制备烧结体。

29. 发明授权

US5217305A Method of evaluating ceramics 失效
标题翻译：评估陶瓷的方法
公开(公告)号：US5217305A
公开(公告)日：1993-06-08
申请号：US867876
申请日：1992-04-13
申请人： Akira Yamakawa , Masaya Miyake , Kozo Ishizaki , Koji Watari
发明人： Akira Yamakawa , Masaya Miyake , Kozo Ishizaki , Koji Watari
IPC分类号： G01N25/20 , G01N25/00 , G01N33/38
CPC分类号： G01N25/005 , G01N33/388
摘要： For evaluating mechanical properties of ceramics such as silicon nitride in a nondestructive manner, a specific heat of ceramic test samples to be evaluated is measured at a temperature not higher than room temperature. A comparison is made between a measured value of the specific heat of the test sample and a known value of a specific heat of a ceramic reference sample at the same temperature not higher than room temperature. The comparison, permits making conclusions regarding the mechanical properties of the ceramic test samples based on the known mechanical properties of the ceramic reference sample. The creep strength is given as one example of the mechanical properties that may be ascertained by a nondestructive inspection that may be part of a production line, whereby the mechanical properties of the individual ceramic products may be guaranteed in practice.

30. 发明授权

US4745022A Composite sintered silicon nitride material and cutting tool made therefrom 失效
标题翻译：复合烧结氮化硅材料和由其制成的切削工具
公开(公告)号：US4745022A
公开(公告)日：1988-05-17
申请号：US790496
申请日：1985-10-23
申请人： Masaya Miyake , Akira Yamakawa
发明人： Masaya Miyake , Akira Yamakawa
IPC分类号： B23B27/14 , C04B35/584 , C04B41/52 , C04B41/89 , B32B7/02 , B24D3/02 , B32B9/00 , C04B35/58
CPC分类号： C04B41/009 , B23B27/148 , C04B35/584 , C04B41/52 , C04B41/89 , Y10T428/24967
摘要： Composite sintered Si.sub.3 N.sub.4 material particularly suitable as a cutting tool material for cutting cast iron is composed of:a sintered Si.sub.3 N.sub.4 substrate containing 0.1 to 10 weight % of Y.sub.2 O.sub.3, 0.1 to 10 weight % of ZrO.sub.2 and if necessary 1 to 15 weight % of at least one member selected from the group consisting of compound and solid solution thereof of elements of IVa (except Zr), Va and VIa of the Periodic Table and the balance being of Si.sub.3 N.sub.4 ;a first layer of Ti compound coated on the sintered Si.sub.3 N.sub.4 substrate;a second layer of Al.sub.2 O.sub.3 coated on the first layer; and the total thickness of the first and second layers being in the range of 1 to 20 microns.The above composite sintered Si.sub.3 N.sub.4 material has an improved abrasive resistance particularly in the case of cutting cast iron at high speed, while retaining the excellent physical properties of Si.sub.3 N.sub.4. Such a composite sintered Si.sub.3 N.sub.4 material is useful for preparing a cutting tool of a long life time.
摘要翻译：特别适合作为切割铸铁的切削工具材料的复合烧结Si3N4材料由以下组成：包含0.1〜10重量％的Y 2 O 3，0.1〜10重量％的ZrO 2的烧结Si 3 N 4基板，如果需要，至少1〜15重量％选自由元素IVa（Zr除外），Va和VIa的元素的化合物和固溶体组成的组，其余为Si 3 N 4; 涂覆在烧结的Si 3 N 4衬底上的第一层Ti化合物; 涂覆在第一层上的第二层Al2O3; 并且第一和第二层的总厚度在1至20微米的范围内。上述复合烧结Si3N4材料具有改进的耐磨性，特别是在高速切割铸铁的情况下，同时保持Si3N4的优异物理性能。这种复合烧结Si 3 N 4材料可用于制备长寿命的切割工具。

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