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91. 发明授权

US5502011A Silicon nitride sintered body 失效
标题翻译：氮化硅烧结体
公开(公告)号：US5502011A
公开(公告)日：1996-03-26
申请号：US303591
申请日：1994-09-09
申请人： Takehisa Yamamoto , Takao Nishioka , Kenji Matsunuma , Akira Yamakawa
发明人： Takehisa Yamamoto , Takao Nishioka , Kenji Matsunuma , Akira Yamakawa
IPC分类号： C04B35/597 , C04B35/587 , C04B35/599
CPC分类号： C04B35/597
摘要： A silicon nitride sintered body characterized by comprising crystal grains having a linear density of 60 to 120 per 50 .mu.m length as measured in an arbitrary two-dimensional section of the sintered body. The silicon nitride sintered body has a shock compressive elasticity limit (Hugoniot-elastic limit) of 15 GPa or more and is substantially composed of crystal phases of .alpha.-silicon nitride and .beta.'-sialon. The percentages of the .alpha.-silicon nitride and .beta.'-sialon are not more than 30% and not less than 70%, respectively. The silicon nitride sintered body is particularly excellent in mechanical strengths at room temperature as well as in productivity and cost efficiency and is useful for applications as the material of parts where a particularly high impact strength is required, such as a valve train mechanism for automobile parts.
摘要翻译：一种氮化硅烧结体，其特征在于包括在烧结体的任意二维截面中测得的每50μm长度的线密度为60至120的晶粒。氮化硅烧结体具有15GPa或更高的冲击压缩弹性极限（Hugoniot弹性极限），并且基本上由α-氮化硅和β'塞隆的结晶相组成。 α硅氮化物和β' - 赛隆的百分比分别不超过30％且不小于70％。氮化硅烧结体在室温下的机械强度以及生产率和成本效率方面特别优异，作为需要特别高的冲击强度的部件的材料，例如汽车部件的气门机构。

92. 发明授权

US5395694A Aluminum nitride powder having surface layer containing oxynitride 失效
标题翻译：具有包含氮氧化物的表面层的氮化铝粉末
公开(公告)号：US5395694A
公开(公告)日：1995-03-07
申请号：US117433
申请日：1993-09-07
申请人： Kouichi Sogabe , Takahiro Matsuura , Seiji Nakahata , Akira Yamakawa
发明人： Kouichi Sogabe , Takahiro Matsuura , Seiji Nakahata , Akira Yamakawa
IPC分类号： C01B21/072 , C04B35/581 , B32B15/04
CPC分类号： C04B35/581 , C01B21/072 , C01B21/0728 , C01P2002/50 , C01P2002/82 , C01P2004/80 , C01P2006/32 , Y10T428/265 , Y10T428/2982 , Y10T428/2991 , Y10T428/2993
摘要： An aluminum nitride powder having a surface layer containing an oxynitride characterized in that the surface layer of the aluminum nitride particle contains an aluminum oxynitride which has an oxygen content of 5 to 75 mol % in terms of Al.sub.2 O.sub.3 /(Al.sub.2 O.sub.3 +AlN). The surface layer of the aluminum nitride powder may contain, besides the aluminum oxynitride, at least one other oxynitride selected from among oxynitrides of Mg, Ca, Ba, Ti, V, Cr, Co, Ni, Cu, Ga, Ge, Zr, Nb, Mo, Ru, Hf, Ta, W, Li, B, Si, Y, Sc and rare metal elements and the aluminum oxynitride and at least one other oxynitride have a total oxygen content in the range of 10 to 75 mol % in terms of (3.times.oxygen amount)/(3.times.oxygen amount+nitrogen amount). The alumina nitride powder can easily be converted into a sintered body having excellent sinterability and favorable characteristics, since the above surface layer reduces the penetration of oxygen from the surface layer into the crystal grains and prevents the formation of microcracks layer.
摘要翻译：一种具有包含氧氮化物的表面层的氮化铝粉末，其特征在于，氮化铝颗粒的表面层含有以Al 2 O 3 /（Al 2 O 3 + AlN）换算的氧含量为5〜75摩尔％的氮氧化铝。除了氮氧化铝之外，氮化铝粉末的表面层可以含有选自Mg，Ca，Ba，Ti，V，Cr，Co，Ni，Cu，Ga，Ge，Zr等的氮氧化物中的至少一种氮氧化物， Nb，Mo，Ru，Hf，Ta，W，Li，B，Si，Y，Sc和稀有金属元素和氮氧化铝和至少一种其他氧氮化物的总氧含量在10〜75摩尔％的范围内（3氧气量）/（3氧气量+氮量）。氮化铝粉末可以容易地转化为具有优异的可烧结性和良好特性的烧结体，因为上述表面层使氧从表面层渗透到晶粒中并防止形成微裂纹层。

93. 发明授权

US5394015A Method of producing sintered silicon nitrides 失效
标题翻译：制造烧结硅氮化物的方法
公开(公告)号：US5394015A
公开(公告)日：1995-02-28
申请号：US91192
申请日：1993-07-14
申请人： Yasushi Tsuzuki , Tomoyuki Awazu , Akira Yamakawa
发明人： Yasushi Tsuzuki , Tomoyuki Awazu , Akira Yamakawa
IPC分类号： C04B35/584 , C04B35/593 , F01L1/04 , F01L3/02 , F02F5/00 , F16J9/26 , C04B35/58
CPC分类号： C04B35/584 , C04B35/5935 , C04B35/6263 , C04B2235/3206 , C04B2235/3217 , C04B2235/3222 , C04B2235/3225 , C04B2235/3865 , C04B2235/3878 , C04B2235/5445 , C04B2235/6022 , C04B2235/604 , C04B2235/6567 , C04B2235/658 , C04B2235/661 , C04B2235/77 , C04B2235/96
摘要： The invention provides a method of producing sintered silicon nitrides having such strength characteristics as are sufficient to insure satisfactory reliability of the sintered silicon nitride for use in applications such as automotive engine parts and bearings. The method comprises preparing a sintering aid by blending yttrium oxide, spinel, and aluminum oxide and/or aluminum nitride together in such proportions in terms of molar ratios of metal elements that Y/(Al+Mg) is 0.23 to 0.85 and Al/Mg is 2.1 to 5.2, mixing 5.0 to 13.0% by weight of the sintering aid with 87.0 to 95.0% by weight of a silicon nitride powder having an .alpha. crystallinity of not less than 60%, and, after the resulting powder mixture is molded into shape, sintering the molded piece at temperatures of 1400 to 1650.degree. C. in a nitrogen gas atmosphere or in an inert gas atmosphere containing nitrogen gas.
摘要翻译：本发明提供了一种制造烧结硅氮化物的方法，其具有足以确保用于汽车发动机部件和轴承的应用中的氮化硅烧结体的令人满意的可靠性的强度特性。该方法包括通过以Y /（Al + Mg）为0.23至0.85的金属元素的摩尔比和Al / Mg的摩尔比将氧化钇，尖晶石和氧化铝和/或氮化铝以这样的比例混合来制备烧结助剂为2.1〜5.2，将5.0〜13.0重量％的烧结助剂与87.0〜95.0重量％的α结晶度为60％以上的氮化硅粉末混合，在得到的粉末混合物成型后，在氮气气氛中或在含有氮气的惰性气体气氛中，在1400〜1650℃的温度下烧结成型体。

94. 发明授权

US5312786A Aluminum nitride sintered body and process for producing the same 失效
标题翻译：氮化铝烧结体及其制造方法
公开(公告)号：US5312786A
公开(公告)日：1994-05-17
申请号：US085302
申请日：1993-06-29
申请人： Akira Yamakawa , Douiti Sogabe , Kohei Shimoda
发明人： Akira Yamakawa , Douiti Sogabe , Kohei Shimoda
IPC分类号： C04B35/581 , C04B35/58
CPC分类号： C04B35/581
摘要： An aluminum nitride sintered body characterized by comprising aluminum nitride as the main component, containing a titanium compound, and having a black color, a transmittance of 10% or less with the light having a wavelength in the range of from 500 to 650 nm and a heat conductivity of 120 W/m.multidot.K or more. The sintered body is produced by adding 0.05 to 5% by weight, in terms of Ti, of a titanium compound and a sintering aid compound and, if necessary, a compound capable of forming carbon after being thermally decomposed to an aluminum nitride powder, molding the mixture, heating the molding in vacuo, air or a nitrogen gas, a hydrogen gas or an atmosphere comprising a mixture of these gases until the residual carbon content is reduced to 2.0% by weight or less, and sintering the heat-treated mixture in a nonoxidizing atmosphere containing nitrogen at 1600.degree. C. or above. The titanium compound is Ti.sub.n O.sub.2n-1 or a solid solution comprising Ti.sub.n O.sub.2n-1 and nitrogen partly dissolved therein in the solid solution form wherein n is 1 or more, or a compound represented by the formula TiN.sub.x O.sub. y wherein 0
摘要翻译：一种氮化铝烧结体，其特征在于，包括氮化铝作为主要成分，含有钛化合物，并且具有黑色，具有波长在500-650nm范围内的光的透射率为10％以下，以及热导率为120W / m×K以上。通过以Ti计的0.05〜5重量％的钛化合物和烧结助剂化合物，根据需要，在热分解成氮化铝粉末后能够形成碳的化合物，将成型体混合物，真空加热成型体，空气或氮气，氢气或包含这些气体的混合物的气氛直到残留碳含量降低至2.0重量％以下，并将热处理后的混合物在1600℃以上含有氮的非氧化气氛。钛化合物是TinO2n-1或其中n为1或更多的固溶体形式的TinO2n-1和氮部分溶解的固溶体，或由式TiN x O y表示的化合物，其中0

95. 发明授权

US4906295A Dispersed reinforced ceramics 失效
标题翻译：分散强化陶瓷
公开(公告)号：US4906295A
公开(公告)日：1990-03-06
申请号：US158115
申请日：1988-02-16
申请人： Yoshinari Miyamoto , Osamu Yamada , Mitsue Koizumi , Osamu Komura , Eiji Kamijo , Masaaki Honda , Akira Yamakawa
发明人： Yoshinari Miyamoto , Osamu Yamada , Mitsue Koizumi , Osamu Komura , Eiji Kamijo , Masaaki Honda , Akira Yamakawa
IPC分类号： C04B35/56 , C04B35/573 , C04B35/58 , C04B35/581 , C04B35/583 , C04B35/591 , C04B35/645 , C04B35/65 , C04B37/02
CPC分类号： C04B35/58092 , C04B35/5607 , C04B35/5611 , C04B35/5626 , C04B35/573 , C04B35/58007 , C04B35/58014 , C04B35/58021 , C04B35/58028 , C04B35/58064 , C04B35/58071 , C04B35/58078 , C04B35/58085 , C04B35/581 , C04B35/583 , C04B35/591 , C04B35/593 , C04B35/645 , C04B35/65 , C04B35/651 , C04B37/021 , C04B2235/6582 , C04B2237/32 , C04B2237/36 , C04B2237/363 , C04B2237/365 , C04B2237/385 , C04B2237/401 , C04B2237/403 , C04B2237/405 , C04B2237/567 , C04B2237/568
摘要： The present invention relates to a method of sintering ceramics and ceramics obtained by said method. According to the present invention, the synthesis and sintering of ceramics can be simultaneously carried out by utilizing the reaction heat generated when at least one metallic element selected from metallic elements of IIIb, IVa, Vb and VIb groups of the Periodic Table is combined with at least one nonmetallic element such as B, C, N and Si without heat or by preliminarily heating the ceramics at temperatures remarkably lower than the usual sintering temperature ceramics, thus-produced are superior in abrasion resistance and corrosion resistance. Furthermore, according to the present invention, particles of the same kind of metal as that used in constructing the ceramics comprising the above described metallic elements and nonmetallic elements are dispersed in a matrix comprising said ceramics to obtain metal dispersed reinforced ceramics in which both the matrix and the metallic particles are strongly and chemically bonded to each other. According to the latter procedure ceramic materials having high temperature characteristics, high corrosion resistance and high abrasion resistance, as well as high toughness and high impact resistance can be obtained.
摘要翻译：本发明涉及通过所述方法得到的烧结陶瓷和陶瓷的方法。根据本发明，陶瓷的合成和烧结可以通过利用当选自元素周期表IIIb，IVa，Vb和VIb族的金属元素中的至少一种金属元素与在至少一种不加热的非金属元素如B，C，N和Si，或通过在比通常的烧结温度陶瓷更低的温度下预先加热陶瓷，因此产生的耐磨性和耐腐蚀性优异。此外，根据本发明，与构成包含上述金属元素和非金属元素的陶瓷相同种类的金属颗粒分散在包含所述陶瓷的基体中以获得金属分散增强陶瓷，其中基体并且金属颗粒彼此强烈化学键合。根据后一种方法，可以获得具有高温特性，高耐腐蚀性和高耐磨性以及高韧性和高耐冲击性的陶瓷材料。

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