公开(公告)号：US06284690B1

公开(公告)日：2001-09-04

申请号：US08708933

申请日：1996-09-06

申请人： Seiji Nakahata ,  Akira Yamakawa

发明人： Seiji Nakahata ,  Akira Yamakawa

IPC分类号： C04B35591

CPC分类号： C04B35/591

摘要： A slurry Si-base composition comprising an Si powder having a thickness of a surface oxide film ranging from 1.5 to 15 nm, 50 to 90% by weight of water, 0.2 to 7.5% by weight, in terms of oxide, of a sintering aid and 0.05 to 3% by weight of a dispersant, the Si-base composition having a pH value adjusted to 8-12. This slurry Si-base composition is produced by a process which comprises subjecting Si powder to oxidation treatment at 200 to 800° C. in air, adding 50 to 90% by weight of water, 0.2 to 7.5% by weight, in terms of oxide, of a sintering aid and 0.05 to 3% by weight of a dispersant to the oxidized Si powder and performing such a pH adjustment that the resultant mixture has a pH value of 8 to 12. The slurry Si-base composition not only enables producing a ceramic of Si3N4 at a lowered cost without the need to install explosionproof facilities but also allows the obtained Si3N4 ceramic having a relative density of at least 96% and a flexural strength of at least 800 MPa can be obtained.

摘要翻译： 一种浆料Si基组合物，其包含Si粉末，其表面氧化膜的厚度为1.5至15nm，50至90重量％的水，0.2至7.5重量％的氧化物，烧结助剂 和0.05〜3重量％的分散剂，所述Si基组合物的pH值调节至8-12。 该浆料Si基组合物是通过以下方法制造的，该方法包括使Si粉末在空气中在200至800℃下进行氧化处理，加入50至90重量％的水，0.2至7.5重量％的氧化物 的烧结助剂和0.05〜3重量％的分散剂与氧化的Si粉末进行这种pH调节，使得所得混合物的pH值为8〜12。浆料Si-碱组合物不仅能够制备 Si3N4的陶瓷，而不需要安装防爆设备，而且还可以获得所获得的相对密度至少为96％，弯曲强度至少为800MPa的Si 3 N 4陶瓷。

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。

公开(公告)号：US5858523A

公开(公告)日：1999-01-12

申请号：US538738

申请日：1995-10-03

申请人： Chihiro Kawai ,  Takahiro Matsuura ,  Akira Yamakawa

发明人： Chihiro Kawai ,  Takahiro Matsuura ,  Akira Yamakawa

IPC分类号： B01D71/02 ,  B01D39/20 ,  B01J35/04 ,  C04B38/00 ,  C04B41/45 ,  C04B41/52 ,  C04B41/81 ,  C04B41/85 ,  C04B41/89 ,  B32B29/02

CPC分类号： C04B41/009 ,  B01D39/2075 ,  B01D39/2086 ,  C04B41/4582 ,  C04B41/52 ,  C04B41/81 ,  C04B41/89 ,  C04B2111/00793 ,  Y10T428/249969 ,  Y10T428/24997 ,  Y10T428/24999 ,  Y10T428/252 ,  Y10T428/259 ,  Y10T442/69 ,  Y10T442/691

摘要： A porous ceramic film which is formed onto and bonded to an oxide layer provided on the surface of a porous base, the film composed of finely deposited particles comprising at least one compound including (a) at least one selected from the group consisting of Si, B and Al or the group consisting of the metals of the Groups IVa, Va and VIa and (b) at least one selected from the group consisting of C and N in which the particles are intertwined with each other and bonded to each other through the component of the oxide layer to form a three-dimensionally intertwined structure. This porous ceramic film is produced by forming the oxide layer on the base surface and then heating it to a temperature of at least of the liquid-phase formation temperature of the oxide layer in a gaseous atmosphere containing the above elements (a) and (b). The porous ceramic film has a high porosity, a good pressure resistance and a regulated pore size and is appropriate for a filter, a catalyst support, bioreactor or a structural material.

摘要翻译： 一种多孔陶瓷膜，其形成在多孔基材的表面上并与其结合的氧化物层上，所述多孔陶瓷膜由精细沉积的颗粒构成，所述微粒包含至少一种化合物，所述至少一种化合物包括（a）选自Si， B和Al或由IVa，Va和VIa族金属组成的组，和（b）选自C和N中的至少一种，其中颗粒彼此缠结并通过 氧化物层的组分以形成三维缠结的结构。 该多孔陶瓷膜通过在基体表面上形成氧化物层，然后在含有上述元素（a）和（b）的气体气氛中将其加热至至少氧化物层的液相形成温度的温度 ）。 多孔陶瓷膜具有高孔隙率，良好的耐压性和调节的孔径，适用于过滤器，催化剂载体，生物反应器或结构材料。

公开(公告)号：US5780374A

公开(公告)日：1998-07-14

申请号：US774612

申请日：1996-12-30

申请人： Chihiro Kawai ,  Takahiro Matsuura ,  Akira Yamakawa

发明人： Chihiro Kawai ,  Takahiro Matsuura ,  Akira Yamakawa

IPC分类号： C04B35/584 ,  C04B38/00 ,  C04B38/06

CPC分类号： C04B38/00 ,  C04B38/06

摘要： A high-porosity and high-strength porous silicon nitride body comprises columnar silicon nitride grains and an oxide bond phase containing 2 to 15 wt. %, in terms of oxide based on silicon nitride, of at least one rare earth element, and has an SiO.sub.2 /(SiO.sub.2 +rare earth element oxide) weight ratio of 0.012 to 0.65 and an average pore size of at most 3.5 .mu.m. The porous silicon nitride body is produced by compacting comprising a silicon nitride powder, 2 to 15 wt. %, in terms of oxide based on silicon nitride, of at least one rare earth element, and an organic binder while controlling the oxygen content and carbon content of said compact; and sintering said compact in an atmosphere comprising nitrogen at 1,650.degree. to 2,200.degree. C. to obtain a porous body having a three-dimensionally entangled structure made up of columnar silicon nitride grains and an oxide bond phase, and having an SiO.sub.2 /(SiO.sub.2 +rare earth element oxide) weight ratio of 0.012 to 0.65.

摘要翻译： 高孔隙率和高强度多孔氮化硅体包括柱状氮化硅颗粒和含有2至15wt。 至少一种稀土元素为基于氮化硅的氧化物的％，SiO 2 /（SiO 2 +稀土元素氧化物）的重量比为0.012〜0.65，平均孔径为3.5μm以下。 多孔氮化硅体通过压制而制成，其包含氮化硅粉末，2〜15重量％ ％，基于氮化硅的氧化物，至少一种稀土元素和有机粘合剂，同时控制所述成型体的氧含量和碳含量; 并在包含氮气的气氛中在1650℃-2200℃下烧结所述成型体，得到由柱状氮化硅晶粒和氧化物结合相构成的三维缠结结构的多孔体，并具有SiO 2 /（SiO 2 + 稀土元素氧化物）重量比为0.012〜0.65。

公开(公告)号：US5756411A

公开(公告)日：1998-05-26

申请号：US696823

申请日：1996-08-20

申请人： Seiji Nakahata ,  Akira Yamakawa ,  Hisao Takeuchi

发明人： Seiji Nakahata ,  Akira Yamakawa ,  Hisao Takeuchi

IPC分类号： C04B35/591

CPC分类号： C04B35/591

摘要： The invention reduces the time required for nitriding in the process of reaction sintering for production of a sintered body of silicon nitride, thereby improving productivity, and provides a sintered body of silicon nitride having sufficient compactness and high strength which can be produced by reaction sintering. The sintered body is Si.sub.3 N.sub.4 having an unpaired electron density of 10.sup.15 /cm.sup.3 to 10.sup.21 /cm.sup.3. The sintered body is produced through reaction sintering by using a Si powder having an unpaired electron density of 10.sup.15 -10.sup.20 /cm.sup.3, which is obtained by annealing a commercially available Si powder at temperatures of 300.degree. to 800.degree. C. in other than nitrogen atmosphere for 3-5 hours. In particular, the sintered body is produced by adding to the so obtained Si powder, together with a sintering assistant, an element having a valence of, particularly, from +1 to +3, the element having a covalent bond radius RM which bears such a relation with the covalent bond radius RSi of Si that (RM - RSi)/RSi

摘要翻译： PCT No.PCT / JP95 / 02679 Sec。 371日期1996年8月20日 102（e）日期1996年8月20日PCT 1995年12月26日PCT公布。 WO96 / 20144 PCT出版物 日本1996年7月4日本发明减少了在制造氮化硅烧结体的反应烧结过程中氮化所需的时间，从而提高了生产率，并提供了具有足够的致密性和高强度的氮化硅烧结体，其可以是 通过反应烧结制备。 烧结体是不成对电子密度为1015 / cm 3至1021 / cm 3的Si 3 N 4。 通过使用不成对电子密度为1015〜1020 / cm 3的Si粉末，通过反应烧结制造烧结体，其通过在氮气气氛以外的温度下在300℃〜800℃下退火市售的Si粉末而得到 持续3-5小时。 特别地，通过将​​如此获得的Si粉末与烧结助剂一起加入具有共价键半径RM的元素（特别是从+1至+3的价数）特别是这样的元素制备烧结体 与RS的共价键半径RSi（RM-RSi）/ RSi <0.5的关系，或作为氮气发生剂的元素的化合物，并使所得复合材料进行反应烧结。

公开(公告)号：US5482905A

公开(公告)日：1996-01-09

申请号：US178642

申请日：1994-01-05

申请人： Seiji Nakahata ,  Takahiro Matsuura ,  Kouichi Sogabe ,  Akira Yamakawa

发明人： Seiji Nakahata ,  Takahiro Matsuura ,  Kouichi Sogabe ,  Akira Yamakawa

IPC分类号： C04B35/581 ,  C04B35/58

CPC分类号： C04B35/581

摘要： An aluminum nitride sintered body comprising aluminum nitride crystals belonging to a Wurtzite hexagonal crystal system wherein the 3 axes a, b and c of the unit lattice of the crystal are defined such that the ratio b/a of the lengths of the axes b and a is 1.000 near the center of the crystal grain and lies within the range 0.997-1.003 in the vicinity of the grain boundary phase. Aluminum nitride sintered body is produced by sintering a molded body of a raw material powder having aluminum and nitrogen as its principal components at a temperature of 1700.degree.-1900.degree. C. in a non-oxidizing atmosphere having a partial pressure of carbon monoxide or carbon of not more than 200 ppm and then cooling the sintered body to 1500.degree. C. or a lower temperature at a rate of 5.degree. C./min or less. The aluminum nitride sintered body has a greatly improved thermal conductivity and, therefore, is suitable for heat slingers, substrates or the like for semiconductor devices.

摘要翻译： 一种氮化铝烧结体，其包含属于纤锌矿六方晶系的氮化铝晶体，其中晶体的单位晶格的3轴a，b和c被定义为使得轴b和a的长度的比率b / a 在晶粒中心附近为1.000，位于晶界相附近的0.997-1.003范围内。 氮化铝烧结体通过在具有一氧化碳或碳分压的非氧化性气氛中，在1700〜1900℃的温度下烧结以铝和氮为主要成分的原料粉末的成型体 不超过200ppm，然后以5℃/分钟以下的速度将烧结体冷却至1500℃或更低温度。 氮化铝烧结体具有大大提高的导热性，因此适用于半导体器件的热引脚，基板等。

公开(公告)号：US5370907A

公开(公告)日：1994-12-06

申请号：US147820

申请日：1993-11-02

申请人： Akira Yamakawa ,  Nobuo Ogasa

发明人： Akira Yamakawa ,  Nobuo Ogasa

IPC分类号： C04B41/51 ,  C04B41/88 ,  H05K1/09 ,  B05D3/02

CPC分类号： C04B41/5133 ,  C04B41/88 ,  H05K1/092

摘要： A metallized layer is to be formed on a surface of an aluminum nitride base material, which may be a sintered body or a nonsintered compact. A mixture is prepared from an oxide component consisting of at least one of Al.sub.2 O.sub.3, SiO.sub.2, CaO, and Y.sub.2 O.sub.3, an iron family component consisting of at least one of Fe, Co and Ni and high melting temperature metal consisting of W and Mo. The content of each component is within a specified range. A paste is prepared by adding an organic binder substance to the mixture. The paste is applied to the surface of the base material and heated under specified conditions to form a metallized layer having a high adhesive peel strength on the surface of the base material.

摘要翻译： 在氮化铝基材的表面上形成金属化层，其可以是烧结体或非烧结体。 由由Al 2 O 3，SiO 2，CaO和Y 2 O 3中的至少一种组成的氧化物组分，由Fe，Co和Ni中的至少一种组成的铁族成分和由W和Mo组成的高熔点金属制成混合物。 每个组件的内容在指定范围内。 通过向混合物中加入有机粘合剂物质制备糊料。 将糊状物施加到基材的表面，并在特定条件下加热，以在基材的表面上形成具有高粘合剥离强度的金属化层。

公开(公告)号：US5369065A

公开(公告)日：1994-11-29

申请号：US118023

申请日：1993-09-08

申请人： Masashi Yoshimura ,  Jin-Joo Matsui ,  Takehisa Yamamoto ,  Akira Yamakawa

发明人： Masashi Yoshimura ,  Jin-Joo Matsui ,  Takehisa Yamamoto ,  Akira Yamakawa

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

CPC分类号： C04B35/5935

摘要： A silicon sintered body comprising a matrix phase consisting of silicon nitride and a grain boundary phase in which the silicon nitride consists of 66 to 99% by volume of .beta.-Si.sub.3 N.sub.4 and/or .beta.'-sialon with the balance being .alpha.-Si.sub.3 N.sub.4 and/or .alpha.'-sialon, the .beta.-Si.sub.3 N.sub.4 and/or .beta.'-sialon consisting of hexagonal rod-like grains having a diameter of 500 nm or less in the minor axis and an aspect ratio 5 to 25, the .alpha.-Si.sub.3 N.sub.4 and/or .alpha.'-sialon consisting of equi-axed grains having an average diameter of 300 nm or less, and titanium compounds are contained within the grains of the matrix phase and in the grain boundary phase. The sintered body is produced by mixing (1) 100 parts by weight of .alpha.-Si.sub.3 N.sub.4 powder, (2) 0.1 to 10 parts by weight of titanium oxide having an average particle size of 100 nm or less and (3) 2 to 15 parts by weight, in total, of specified sintering aids; molding the resultant powder mixture into a green compact; subjecting the green compact to primary sintering and secondary sintering under the prescribed conditions.

摘要翻译： 一种硅烧结体，包括由氮化硅和晶界相组成的基质相，其中氮化硅由66-99体积％的β-Si 3 N 4和/或β' - 赛隆组成，余量为α-Si 3 N 4和/ 或α' - 塞隆，β-Si 3 N 4和/或β'-Sialon由短轴具有500nm或更小直径的六角棒状晶粒和5至25的长宽比组成，α-Si 3 N 4和/ 或由平均直径为300nm以下的等轴晶粒组成的α'-Sialon，并且钛化合物包含在基质相的晶粒内和晶界相中。 烧结体通过混合（1）100重量份的α-Si 3 N 4粉末，（2）0.1〜10重量份的平均粒径为100nm以下的氧化钛和（3）2〜15重量份 总共为指定的烧结助剂; 将所得粉末混合物成型为生坯; 在规定的条件下对生坯进行一次烧结和二次烧结。

公开(公告)号：US4598053A

公开(公告)日：1986-07-01

申请号：US706166

申请日：1985-02-27

申请人： Akira Yamakawa ,  Eiji Kamijo

发明人： Akira Yamakawa ,  Eiji Kamijo

IPC分类号： C04B35/486 ,  C04B35/48

CPC分类号： C04B35/486

摘要： A ceramic compact having a high transverse rupture strength is provided by a low cost sintering method. This ceramic compact comprises 55 to 96% by volume of a first component, 4 to 45% by volume of a second component and at most 3% by volume of unavoidable impurities:First Component: ZrO.sub.2 consisting of at least 80% by weight of at least one of tetragonal system and cubic system and the balance of mono-clinic system, in which at least one member selected from the group consisting of oxides of Group IIIa (Including Sc, Y, La) elements of the Periodic Table, CaO, MgO, and mixtures thereof are dissolved to form a solid solution.Second Component: at least one member selected from the group consisting of carbonitrides, oxycarbides, oxynitrides and carboxynitrides of group IVa (Including Ti, Zr, Hf), Va (Including V, Nb, Ta) and VIa (Including Cr, Mo, W) elements of the Periodic Table, and mixtures or solid solutions thereof.

摘要翻译： 通过低成本烧结方法提供具有高横向断裂强度的陶瓷压块。 该陶瓷压块包括55至96体积％的第一组分，4至45体积％的第二组分和至多3体积％的不可避免的杂质：第一组分：由至少80重量％的 至少一种四方晶系和立方体系以及单一临床体系的余量，其中选自元素周期表IIIa族（包括Sc，Y，La）元素的氧化物中的至少一种，CaO，MgO ，及其混合物溶解形成固溶体。 第二成分：选自第Ⅳa族（包括Ti，Zr，Hf），Va（包括V，Nb，Ta）和VIa（包括Cr，Mo，W）的碳氮化物，碳氧化物，氮氧化物和氮氧化物中的至少一种 ）元素，以及它们的混合物或固溶体。

公开(公告)号：US06315843B1

公开(公告)日：2001-11-13

申请号：US09454640

申请日：1999-12-06

申请人： Takashi Matsuura ,  Akira Yamakawa

发明人： Takashi Matsuura ,  Akira Yamakawa

IPC分类号： C21D118

CPC分类号： F01L3/20 ,  C04B37/026 ,  C04B2235/52 ,  C04B2235/656 ,  C04B2235/666 ,  C04B2235/667 ,  C04B2235/963 ,  C04B2237/121 ,  C04B2237/125 ,  C04B2237/368 ,  C04B2237/406 ,  C04B2237/704 ,  C04B2237/708 ,  C04B2237/76 ,  F01L1/14 ,  F01L1/16 ,  F01L1/18 ,  F01L2101/00 ,  F01L2101/02 ,  F01L2103/00 ,  Y10S228/903

摘要： A method of manufacturing a sliding component comprising a main body made of a non-carburized heat-hardened steel and a member adapted to form at least one sliding face of sliding faces of the sliding component and heat-joined to the main body, in which the steel-made main body is heat-hardened before heat-joining to the member and the heat-joining between the main body made of the heat-hardened steel and the member is conducted at a lower temperature than the temperature at which the heat-hardened main body has been heat-hardened. The sliding component is superior in hardness and abrasion resistance and is readily manufactured at a reduced cost.

摘要翻译： 一种滑动部件的制造方法，其特征在于，包括由非渗碳热硬化钢构成的主体和适于形成所述滑动部件的滑动面的至少一个滑动面并热连接到所述主体的部件， 钢制主体在与构件接合之前被加热硬化，并且由热硬化钢构成的主体与构件之间的热连接在比加热硬化钢的温度低的温度下进行， 硬化主体已经被加热硬化。 滑动部件的硬度和耐磨性优异，并且以较低的成本容易地制造。