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1. 发明授权

US5403790A Additives for property modification in ceramic composite bodies 失效
标题翻译：陶瓷复合材料的改性添加剂
公开(公告)号：US5403790A
公开(公告)日：1995-04-04
申请号：US960407
申请日：1993-01-11
申请人： Terry D. Claar , Gerhard H. Schiroky , Kevin P. Pochopien , Vilupanur A. Ravi , James C. Wang , Ratnesh K. Dwivedi
发明人： Terry D. Claar , Gerhard H. Schiroky , Kevin P. Pochopien , Vilupanur A. Ravi , James C. Wang , Ratnesh K. Dwivedi
IPC分类号： C04B35/56 , C04B35/58 , C04B35/65 , C04B41/50 , C04B41/87 , C22C29/00 , C22C29/06 , B22F3/26
CPC分类号： C04B35/563 , C04B35/5622 , C04B35/58078 , C04B35/65 , C04B35/652 , C04B41/5062 , C04B41/87 , C22C29/00 , C22C29/06 , C22C29/062
摘要： This invention relates generally to a novel method of manufacturing a composite body. More particularly, the present invention relates to a method for modifying the resultant properties of a composite body, by, for example, minimizing the amount of porosity present in the composite body. Moreover, additives, whether used alone or in combination, (1) can be admixed with the permeable mass, (2) can be mixed or alloyed with the parent metal, (3) can be placed at an interface between the parent metal and the preform or mass of filler material, (4) or any combination of the aforementioned methods, to modify properties of the resultant composite body. Particularly, additives such as VC, NbC, WC, W.sub.2 B.sub.5, TaC, ZrC, ZrB.sub.2, SiB.sub.6, SiC, MgO, Al.sub.2 O.sub.3, ZrO.sub.2, CeO.sub.2, Y.sub.2 O.sub.3, La.sub.2 O.sub.3, MgAl.sub.2 O.sub.4, HfO.sub.2, ZrSiO.sub.4, Yb.sub.2 O.sub.3 and Mo.sub.2 B.sub.5 can be combined with the permeable mass in an amount of about 5-50 percent by weight, prior to reactively infiltrating the permeable mass. Moreover, an additive may also include substantially pure elemental metals (e.g., Nb, Ti, Hf, V, Ta, Cr, Mo, Al, Cr, Si, Co and W) which may be provided by any of the methods discussed above herein.
摘要翻译： PCT No.PCT / US91 / 04951 Sec。 371日期：1993年1月11日 102（e）日期1993年1月11日PCT PCT 1991年7月12日PCT公布。公开号WO92 / 00933 日本1992年1月23日。本发明一般涉及一种制造复合体的新方法。更具体地说，本发明涉及通过例如最小化复合体中存在的孔隙率来改变复合体的合成性能的方法。此外，无论单独使用还是组合使用，添加剂（1）均可与可渗透物质混合，（2）可与母体金属混合或合金化，（3）可置于母体金属与母体金属之间的界面处填充材料的预制件或质量，（4）或上述方法的任何组合，以改变所得复合材料的性能。特别地，可以将诸如VC，NbC，WC，W2B5，TaC，ZrC，ZrB2，SiB6，SiC，MgO，Al2O3，ZrO2，CeO2，Y2O3，La2O3，MgAl2O4，HfO2，ZrSiO4，Yb2O3和Mo2B5的添加剂与渗透性在反应性渗透可渗透物质之前，其质量为约5-50重量％。此外，添加剂还可以包括可以通过上述任何方法提供的基本上纯的元素金属（例如，Nb，Ti，Hf，V，Ta，Cr，Mo，Al，Cr，Si，Co和W）。

2. 发明授权

US5529109A Flotation process for the formation of metal matrix composite bodies 失效
标题翻译：用于形成金属基体复合体的浮选工艺
公开(公告)号：US5529109A
公开(公告)日：1996-06-25
申请号：US394915
申请日：1995-02-27
申请人： Ratnesh K. Dwivedi , John T. Burke , Gerhard H. Schiroky , Michael K. Aghajanian , Steven D. Keck
发明人： Ratnesh K. Dwivedi , John T. Burke , Gerhard H. Schiroky , Michael K. Aghajanian , Steven D. Keck
IPC分类号： C04B41/51 , B22D19/14
CPC分类号： C04B41/51
摘要： The present invention relates to a novel method for forming metal matrix composite bodies. Particularly, a permeable mass of filler material is formed into a preform. The preform material can then be placed onto the surface of or into a matrix metal alloy, whereupon the matrix metal alloy spontaneously infiltrates the preform. After substantial complete infiltration of the preform, the preform begins to at least partially sink into the matrix metal alloy supply. The depth to which the preform may sink into the molten matrix metal alloy is controlled by utilizing a support means. The support means prevents the preform being infiltrated from submerging completely beneath the surface of the matrix metal alloy supply. The matrix metal which has infiltrated the preform is then allowed to cool, thus forming a metal matrix composite body.
摘要翻译：本发明涉及一种形成金属基体复合体的新方法。特别地，将可渗透的填料材料形成为预制件。然后可以将预成型材料放置在基体金属合金的表面上，然后基体金属合金自发地渗入预成型体。在预成型件完全浸透之后，预成型件开始至少部分地沉入基体金属合金材料。通过利用支撑装置来控制预成型件可能沉入熔融基质金属合金的深度。支撑装置防止预成型件被浸入完全浸没在基体金属合金供应的表面之下。然后使渗透预型体的基体金属冷却，形成金属基体复合体。

3. 发明授权

US5620791A Brake rotors and methods for making the same 失效
标题翻译：制动转子和制造相同的方法
公开(公告)号：US5620791A
公开(公告)日：1997-04-15
申请号：US370122
申请日：1995-01-09
申请人： Ratnesh K. Dwivedi , John T. Burke
发明人： Ratnesh K. Dwivedi , John T. Burke
IPC分类号： C22C1/10 , C22C32/00 , F16D65/00 , F16D65/12 , F16D69/02 , B32B5/16 , F16D13/60 , F16D69/00
CPC分类号： C22C1/1015 , C22C1/1036 , C22C32/00 , C22C47/06 , F16D65/0006 , F16D65/125 , F16D69/027 , F16D2250/0007 , Y10T428/25 , Y10T428/252 , Y10T428/257 , Y10T428/259
摘要： This invention relates to metal and ceramic matrix composite brake rotors comprising an interconnected matrix embedding at least one filler material. In the case of metal matrix composite materials, the at least one filler material comprises at least about 26% by volume of the brake rotor for most applications, and at least about 20% by volume for applications involving passenger cars and trucks. In a preferred embodiment of the present invention, the metal matrix composite brake rotor comprises an interconnected metal matrix containing at least about 28% by volume of a particulate filler material and more preferably at least about 30% by volume. Moreover, the composite rotors of the present invention exhibit a maximum operating temperature of at least about 900.degree. F. and preferably at least about 950.degree. F. and even more preferably at least about 975.degree. F. and higher.
摘要翻译：本发明涉及包含嵌入至少一种填充材料的互连基体的金属和陶瓷基复合制动转子。在金属基质复合材料的情况下，至少一种填充材料包括用于大多数应用的制动转子的至少约26体积％，对于涉及乘用车和卡车的应用，至少约20体积％。在本发明的一个优选实施例中，金属基复合制动转子包括相互连接的金属基体，其包含至少约28体积％的颗粒状填充材料，更优选至少约30体积％。此外，本发明的复合转子的最大工作温度表现出至少约900°F，优选至少约950°F，甚至更优选至少约975°F或更高。

4. 发明授权

US5268340A Method for producing composite ceramic structures 失效
标题翻译：复合陶瓷结构的制造方法
公开(公告)号：US5268340A
公开(公告)日：1993-12-07
申请号：US934592
申请日：1992-08-24
申请人： Marc S. Newkirk , Danny R. White , Ratnesh K. Dwivedi
发明人： Marc S. Newkirk , Danny R. White , Ratnesh K. Dwivedi
IPC分类号： C04B35/65 , C04B35/10
CPC分类号： C04B35/652
摘要： A method for producing a self-supporting ceramic composite body which comprises preparing a polycrystalline material as the oxidation reaction product of a parent metal with a vapor-phase oxidant, comminuting the resulting material to a particulate, forming a permeable mass of said particulate as filler, and infiltrating said particulate with an oxidation reaction product of a parent metal with a vapor-phase oxidant, thereby forming said ceramic composite body.
摘要翻译：一种自支撑陶瓷复合体的制造方法，其特征在于，制备作为母金属与气相氧化剂的氧化反应产物的多晶材料，将所得材料粉碎成颗粒，形成所述颗粒状的可渗透物质作为填料，并用母体金属的氧化反应产物与气相氧化剂渗透所述颗粒，从而形成所述陶瓷复合体。

5. 发明授权

US5224533A Method of forming metal matrix composite bodies by a self-generated vaccum process, and products produced therefrom 失效
标题翻译：通过自生真空法制备金属基体复合体的方法，以及由其生产的产品
公开(公告)号：US5224533A
公开(公告)日：1993-07-06
申请号：US888241
申请日：1992-05-22
申请人： Robert C. Kantner , Stanislav Antolin , Ratnesh K. Dwivedi
发明人： Robert C. Kantner , Stanislav Antolin , Ratnesh K. Dwivedi
IPC分类号： C04B35/65 , C04B41/51 , C04B41/88 , C22C1/10
CPC分类号： C22C1/1036 , C04B35/652 , C04B41/51 , C04B41/88 , C22C2001/1063
摘要： The present invention relates to a novel process for forming metal matrix composite bodies. Particularly, a suitable matrix metal, typically in a molten state, is in contact with a suitable filler material or preform in the presence of a suitable reactive atmosphere in a sealed impermeable container, at least at some point during the process, which permits a reaction to occur between the reactive atmosphere and the molten matrix metal and/or filler material or preform and/or impermeable container, thereby causing molten matrix metal to infiltrate the filler material or preform due to, at least in part, the creation of a self-generated vacuum. Such self-generated vacuum infiltration occurs without the application of any external pressure or vacuum.
摘要翻译：本发明涉及一种形成金属基复合体的新方法。特别地，通常处于熔融状态的合适的基质金属在合适的反应气氛存在下，在密封的不渗透容器中至少在该过程中的某一点处与合适的填料或预型体接触，这允许反应在反应性气氛和熔融基体金属和/或填充材料或预成型体和/或不可渗透的容器之间发生，从而由于至少部分地产生自发性气体，从而导致熔融基质金属渗入填料或预型体，产生真空。在不施加任何外部压力或真空的情况下，这种自发生成的真空渗透发生。

6. 发明授权

US5204299A Modified ceramic structures 失效
标题翻译：改性陶瓷结构
公开(公告)号：US5204299A
公开(公告)日：1993-04-20
申请号：US787808
申请日：1991-11-04
申请人： Ratnesh K. Dwivedi , Christopher R. Kennedy
发明人： Ratnesh K. Dwivedi , Christopher R. Kennedy
IPC分类号： C04B35/65 , C04B41/50 , C04B41/87
CPC分类号： C04B41/87 , C04B35/652 , C04B41/5025
摘要： A method of producing self-supporting ceramic a ceramic composite structures comprising (i) a polycrystalline oxidation reaction product formed upon oxidation of a body of molten parent metal with an oxidant, and (ii) interconnected porosity at least partially accessible from one or more surfaces of the ceramic body. A second polycrystalline ceramic or ceramic composite material is incorporated into the porosity of the ceramic or ceramic composite body to modify or contribute to its properties.
摘要翻译：一种生产自支撑陶瓷陶瓷复合结构的方法，包括：（i）在熔化母体金属体与氧化剂氧化时形成的多晶氧化反应产物，和（ii）至少部分可从一个或多个表面接近的互连孔隙的陶瓷体。第二种多晶陶瓷或陶瓷复合材料被掺入陶瓷或陶瓷复合体的孔隙中以改变或有助于其性质。

7. 发明授权

US5019541A Method for producing self-supporting ceramic bodies with altered microstructures 失效
标题翻译：具有改变的微结构的自支撑陶瓷体的制造方法
公开(公告)号：US5019541A
公开(公告)日：1991-05-28
申请号：US547404
申请日：1990-07-02
申请人： Robert C. Kantner , Michael K. Aghajanian , Stanislav Antolin , Alan S. Nagelberg , Ratnesh K. Dwivedi
发明人： Robert C. Kantner , Michael K. Aghajanian , Stanislav Antolin , Alan S. Nagelberg , Ratnesh K. Dwivedi
IPC分类号： C04B35/65 , C22C29/12
CPC分类号： C04B35/652 , C22C29/12
摘要： This invention relates to a method for producing a self-supporting ceramic structure comprising an oxidation reaction product of a parent metal and a vapor-phase oxidant characterized by an altered microstructure attributable to the addition of one or more process modifiers relative to substantially the same oxidation reaction product produced without a process modifier.
摘要翻译：本发明涉及一种用于生产自支撑陶瓷结构的方法，其包括母体金属和气相氧化剂的氧化反应产物，其特征在于相对于基本上相同的氧化物添加一种或多种工艺改性剂的改变的微结构产生不含过程改性剂的反应产物。

8. 发明授权

US5005631A Method for forming a metal matrix composite body by an outside-in spontaneous infiltration process, and products produced thereby 失效
标题翻译：通过外部自发渗透方法形成金属基质复合体的方法，以及由此产生的产品
公开(公告)号：US5005631A
公开(公告)日：1991-04-09
申请号：US269370
申请日：1988-11-10
申请人： Ratnesh K. Dwivedi
发明人： Ratnesh K. Dwivedi
IPC分类号： B22D19/14 , C04B41/45 , C04B41/51 , C04B41/81 , C04B41/88 , C22C21/00 , C22C47/08
CPC分类号： C04B41/009 , C04B41/4519 , C04B41/5155 , C04B41/81 , C04B41/88 , C22C47/08 , C04B2111/00931
摘要： The present invention relates to a novel method for forming a metal matrix composite body, and products produced thereby. Particularly, a permeable mass of filler material is formed into a preform, the preform having at least a portion thereof which contains a cavity. An infiltration enhancer and/or an infiltration enhancer precursor and/or an infiltrating atmosphere are also in communication with the preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the preform when the preform is placed into molten matrix metal. An infiltrating atmosphere is provided in communication with the cavity in the preform for at least a portion of the process, and molten matrix metal is contacted with an exterior portion of the preform, such that molten matrix metal will spontaneously infiltrate the preform from an exterior surface thereof toward the cavity.

9. 发明授权

US4998578A Method of making metal matrix composites 失效
标题翻译：制备金属基复合材料的方法
公开(公告)号：US4998578A
公开(公告)日：1991-03-12
申请号：US380977
申请日：1989-07-17
申请人： Ratnesh K. Dwivedi , Virgil Irick, Jr.
发明人： Ratnesh K. Dwivedi , Virgil Irick, Jr.
IPC分类号： C04B35/111 , C04B35/65 , C22C1/10 , C22C32/00
CPC分类号： C22C1/1036 , C04B35/111 , C04B35/652 , C22C32/0063 , C22C2001/1063
摘要： An aluminum metal matrix composite comprises an aluminum metal matrix embedding a second filler, such as a ceramic second filler, and is formed by contacting, for example, a molten aluminum metal with a permeable mass of second filler within a ceramic impervious mold formed by growing a polycrystalline oxidation reaction product into a first filler. By hermetically sealing the second filler within the mold with a body of molten aluminum metal, the latter spontaneously infiltrates the mass of second filler at moderate temperatures, e.g. about 900.degree. C., without need of any other infiltration expedients. The molten mass containing the infiltrated ceramic filler is solidified to provide the metal matrix composite which may be recovered from the mold. Optionally, the solidification is carried out under bonding conditions including maintaining the solidifying material in direct contact with the ceramic mold, to provide the metal matrix composite joined to the mold, or a part thereof, as a structural component.
摘要翻译：铝金属基质复合材料包括嵌入第二填料（例如陶瓷第二填料）的铝金属基体，并且通过例如熔融铝金属与可渗透的第二填料物质接触而形成，所述陶瓷不可渗透模具通过生长形成将多晶氧化反应产物转化成第一填料。通过用熔融铝金属体将模具内的第二填料气密密封，后者在中等温度下自发渗透第二填料块，约900℃，无需任何其他渗透方式。包含渗透的陶瓷填料的熔融物料被固化，以提供可以从模具回收的金属基质复合材料。任选地，固化在包括保持固化材料与陶瓷模具直接接触的粘结条件下进行，以提供连接到模具或其一部分作为结构部件的金属基复合材料。

10. 发明授权

US4849266A Compliant layer 失效
标题翻译：合规层
公开(公告)号：US4849266A
公开(公告)日：1989-07-18
申请号：US116412
申请日：1987-11-03
申请人： Ratnesh K. Dwivedi , Virgil Irick, Jr.
发明人： Ratnesh K. Dwivedi , Virgil Irick, Jr.
IPC分类号： C04B37/02 , B22D11/00 , B22D19/00
CPC分类号： B22D19/00 , F05C2251/042 , Y10T29/49984 , Y10T428/131 , Y10T428/249987 , Y10T428/31678
摘要： This invention relates to a new ceramic-metal composite body and a method for producing the same. Particularly, a compliant layer composition is utilized for preventing the rupture of a ceramic article and/or the yielding or failure of a metal during the pouring, solidification and cooling of a molten metal which has been cast around the ceramic. A slurry composition for the compliant layer includes plaster of paris, a liquid vehicle and a filler material. The slurry composition is coated on the ceramic article and thereafter is heat-treated to form a compliant layer. Ceramic-metal composite bodies comprising low strength hollow articles and high expansion coefficient metals may be manufactured according to the method of this invention.

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