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1. 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。

2. 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.

3. 发明授权

US5204297A Silicon nitride sintered body and process for producing the same 失效
标题翻译：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.

4. 发明授权

US5173458A Silicon nitride sintered body and process for producing the same 失效
标题翻译：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.

5. 发明授权

US4764490A Process for preparation of sintered silicon nitride 失效
标题翻译：烧结氮化硅的制备方法
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。

6. 发明授权

US5275772A Silicon nitride sintered body and process for producing the same 失效
标题翻译：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。

7. 发明授权

US5225127A Process for production of sintered silicon nitride made article 失效
标题翻译：制造烧结氮化硅制品的方法
公开(公告)号：US5225127A
公开(公告)日：1993-07-06
申请号：US829571
申请日：1992-02-03
申请人： Takao Nishioka , Yoshishige Takano , Kenji Matsunuma , Matsuo Higuchi , Masaya Miyake
发明人： Takao Nishioka , Yoshishige Takano , Kenji Matsunuma , Matsuo Higuchi , Masaya Miyake
IPC分类号： C04B35/593
CPC分类号： C04B35/5935
摘要： There is provided a process for the production of a sintered article which comprises steps ofshaping a raw material powder comprising silicon nitride,thermally treating a shaped article in a non-oxidizing atmosphere at a temperature of 1300.degree. to 1650.degree. C. for at least 2 hours to form .beta.-silicon nitride of not less than 85% calculated from X-ray diffraction patterns and to increase a relative density of the article to not less than 80%, preferably to 80 to 85 %, andsintering the thermally treated article at a temperature of 1700.degree. to 2000.degree. C.
摘要翻译：提供了一种生产烧结制品的方法，该方法包括以下步骤：使含有氮化硅的原料粉末成形，在1300℃至1650℃的温度下在非氧化性气氛中对成形制品进行热处理，至少 2小时以形成由X射线衍射图计算的不小于85％的β-氮化硅，并将制品的相对密度提高至不小于80％，优选至80至85％，并将热处理物品在1700〜2000℃的温度下

8. 发明授权

US5234642A High strength silicon nitride sintered body and process for producing same 失效
标题翻译：高强度硅氮化物烧结体及其生产方法
公开(公告)号：US5234642A
公开(公告)日：1993-08-10
申请号：US459398
申请日：1989-12-29
申请人： Takao Nishioka , Akira Kuibira , Kenji Matsunuma , Yoshishige Takano , Matsuo Higuchi , Masaaki Honda , Masaya Miyake
发明人： Takao Nishioka , Akira Kuibira , Kenji Matsunuma , Yoshishige Takano , Matsuo Higuchi , Masaaki Honda , Masaya Miyake
IPC分类号： C04B35/597
CPC分类号： C04B35/597
摘要： A high-strength silicon nitride sintered body having a flexural strength of 100 kg/mm.sup.2 or higher and a process for producing the same are disclosed, the sintered body comprising not less than 90% by weight of a single crystalline phase of silicon aluminum oxynitride (Si.sub.6-z Al.sub.2 O.sub.z N.sub.8-z, wherein z is a number of from 0 to 4.2) having an average longer diameter of not more than 5 .mu.m and an aspect ratio of not less than 5, the crystal phase constituting a network structure in the sintered body, the balance being a crystalline or amorphous (glassy) phase comprising one or more of oxides or oxynitrides of a rare earth metal, a group 3A metal, a group 2A metal or Si, and the process comprising mixing silicon nitride powder, an organic metal salt as a first sintering aid, and at least one of a metal oxide, a metal nitride, and a metal oxynitride as a second sintering aid, either separately or as a mixture of two or more thereof, with a solvent and a surface active agent, subjecting the mixture or mixtures to ultrasonic dispersion, mixing the mixtures together followed by drying to obtain a mixed powder, molding the mixed powder, and sintering the molded article at a temperature of from 1,600.degree. to 2,200.degree. C. in a non-oxidative atmosphere.

9. 发明授权

US5328876A High strength silicon nitride sintered body and process for producing same 失效
标题翻译：高强度氮化硅烧结体及其制造方法
公开(公告)号：US5328876A
公开(公告)日：1994-07-12
申请号：US995703
申请日：1992-12-23
申请人： Takao Nishioka , Akira Kuibira , Kenji Matsunuma , Yoshishige Takano , Matsuo Higuchi , Masaaki Honda , Masaya Miyake
发明人： Takao Nishioka , Akira Kuibira , Kenji Matsunuma , Yoshishige Takano , Matsuo Higuchi , Masaaki Honda , Masaya Miyake
IPC分类号： C04B35/597 , C04B35/58
CPC分类号： C04B35/597
摘要： A high-strength silicon nitride sintered body having a flexural strength of 100 kg/mm.sup.2 or higher and a process for producing the same are disclosed, the sintered body comprising not less than 90% by weight of a single crystalline phase of silicon aluminum oxynitride (Si.sub.6-z Al.sub.2 O.sub.z N.sub.8-z, wherein z is a number of from 0 to 4.2) having an average longer diameter of not more than 5 .mu.m and an aspect ratio of not less than 5, the crystal phase constituting a network structure in the sintered body, the balance being a crystalline or amorphous (glassy) phase comprising one or more of oxides or oxynitrides of a rare earth metal, a group 3A metal, a group 2A metal or Si, and the process comprising mixing silicon nitride powder, an organic metal salt as a first sintering aid, and at least one of a metal oxide, a metal nitride, and a metal oxynitride as a second sintering aid, either separately or as a mixture of two or more thereof, with a solvent and a surface active agent, subjecting the mixture or mixtures to ultrasonic dispersion, mixing the mixtures together followed by drying to obtain a mixed powder, molding the mixed powder, and sintering the molded article at a temperature of from 1,600.degree. C. to 2,200.degree. C. in a non-oxidative atmosphere.
摘要翻译：公开了一种弯曲强度为100kg / mm 2以上的高强度氮化硅烧结体及其制造方法，所述烧结体包含不小于90重量％的氮化硅铝的单晶相（ Si6-zAl2OzN8-z，其中z为0-4.2的数），平均长度不大于5μm，纵横比不小于5，构成烧结体网状结构的晶相余量为包含稀土金属，3A族金属，2A族金属或Si族的氧化物或氮氧化物中的一种或多种的结晶或无定形（玻璃质）相，并且该方法包括将氮化硅粉末，有机金属盐作为第一烧结助剂，以及作为第二烧结助剂的金属氧化物，金属氮化物和金属氮氧化物中的至少一种，分别地或作为其两种或多种的混合物与溶剂和表面活性剂对混合物进行处理或与超声分散体的混合物，将混合物混合在一起，然后干燥以获得混合粉末，模塑混合粉末，并在非氧化性气氛中在1600℃至2200℃的温度下烧结该模制品。

10. 发明授权

US5904993A Joint body of aluminum and silicon nitride and method of preparing the same 失效
标题翻译：铝和氮化硅接头体及其制备方法
公开(公告)号：US5904993A
公开(公告)日：1999-05-18
申请号：US648178
申请日：1996-05-21
申请人： Hisao Takeuchi , Koichi Sogabe , Takao Nishioka , Takashi Matsuura , Akira Yamakawa
发明人： Hisao Takeuchi , Koichi Sogabe , Takao Nishioka , Takashi Matsuura , Akira Yamakawa
IPC分类号： B23K20/00 , B23K20/02 , C04B37/02 , B23B15/04 , B22F7/00 , B23K1/19
CPC分类号： B23K20/023 , B23K2203/10 , Y10T428/12535 , Y10T428/12576 , Y10T428/31678
摘要： A joint body in which aluminum and silicon nitride are strongly joined with each other is provided at a low cost, thereby providing a lightweight part which is excellent in sliding property as a mechanical part of an internal combustion engine of an automobile or the like. The joint body includes a base material which is mainly composed of aluminum, and a member consisting of a silicon nitride sintered body which is substantially directly joined to the base material. A powdery or bulky base material (2) mainly composed of aluminum, and a member (1) consisting of a silicon nitride sintered body are charged in a mold and heated under pressurization, thereby joining the same with each other.
摘要翻译： PCT No.PCT / JP95 / 01870 Sec。 371日期：1996年5月21日 102（e）日期1996年5月21日PCT提交1995年9月20日PCT公布。公开号WO96 / 09266 日期：1996年3月28日以低成本提供铝和氮化硅彼此牢固地接合的接头体，从而提供作为汽车内燃机的机械部件的滑动性优异的轻质部件或类似物。接合体包括主要由铝构成的基材和由基本上直接接合到基材的氮化硅烧结体构成的部件。主要由铝构成的粉状或体积大的基材（2）和由氮化硅烧结体构成的部件（1）加入到模具中并在加压下加热，从而将它们彼此接合。

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