公开(公告)号：US5840221A

公开(公告)日：1998-11-24

申请号：US758715

申请日：1996-12-02

申请人： Sai-Kwing Lau ,  Salavatore J. Calandra ,  Roger W. Ohnsorg

发明人： Sai-Kwing Lau ,  Salavatore J. Calandra ,  Roger W. Ohnsorg

IPC分类号： C04B41/88 ,  B28B1/26 ,  B28B1/52 ,  B28B23/00 ,  C04B35/565 ,  C04B35/573 ,  C04B35/80 ,  E21D11/38 ,  E21F16/02 ,  C01B31/36

CPC分类号： B28B1/52 ,  B28B1/265 ,  B28B23/0006 ,  C04B35/565 ,  C04B35/573 ,  C04B35/6263 ,  C04B35/6269 ,  C04B35/62857 ,  C04B35/62865 ,  C04B35/62868 ,  C04B35/62871 ,  C04B35/62873 ,  C04B35/62897 ,  C04B35/806 ,  E21D11/383 ,  E21F16/02 ,  C04B2235/3821 ,  C04B2235/3826 ,  C04B2235/421 ,  C04B2235/424 ,  C04B2235/48 ,  C04B2235/5244 ,  C04B2235/5248 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/5472 ,  C04B2235/652 ,  C04B2235/661 ,  C04B2235/94 ,  C04B2235/96 ,  C04B2235/9607 ,  C04B2235/9623 ,  C04B2235/963 ,  Y10T428/292 ,  Y10T428/2929 ,  Y10T428/2933 ,  Y10T428/2938 ,  Y10T428/30

摘要： A process comprising the steps of: a) providing a fiber preform comprising a non-oxide ceramic fiber with at least one coating, the coating comprising a coating element selected from the group consisting of carbon, nitrogen, aluminum and titanium, and the fiber having a degradation temperature of between 1400.degree. C. and 1450.degree. C., b) impregnating the preform with a slurry comprising silicon carbide particles and between 0.1 wt % and 3 wt % added carbon c) providing a cover mix comprising: i) an alloy comprising a metallic infiltrant and the coating element, and ii) a resin, d) placing the cover mix on at least a portion of the surface of the porous silicon carbide body, e) heating the cover mix to a temperature between 1410.degree. C. and 1450.degree. C. to melt the alloy, and f) infiltrating the fiber preform with the melted alloy for a time period of between 15 minutes and 240 minutes, to produce a ceramic fiber reinforced ceramic composite.

摘要翻译： 一种方法，包括以下步骤：a）提供包含非氧化物陶瓷纤维的至少一层涂层的纤维预制件，所述涂层包含选自碳，氮，铝和钛的涂层元素，所述纤维具有 降解温度在1400℃至1450℃之间，b）用包含碳化硅颗粒的浆料和0.1重量％至3重量％的添加碳之间浸渍预型体c）提供覆盖混合物，其包括：i）合金 包括金属浸渗剂和涂层元件，以及ii）树脂，d）将覆盖混合物放置在多孔碳化硅体的至少一部分表面上，e）将覆盖混合物加热至1410℃ 熔融合金，f）用熔融合金浸渍纤维预成型件15分钟至240分钟的时间，制成陶瓷纤维增强陶瓷复合材料。

公开(公告)号：US5436042A

公开(公告)日：1995-07-25

申请号：US212536

申请日：1994-03-11

申请人： Sai-Kwing Lau ,  Roger W. Ohnsorg ,  Salvatore J. Calandra

发明人： Sai-Kwing Lau ,  Roger W. Ohnsorg ,  Salvatore J. Calandra

IPC分类号： C04B35/80 ,  F16B5/00

CPC分类号： C04B35/80 ,  Y10T428/1317 ,  Y10T428/17 ,  Y10T428/249921

摘要： This invention is directed to substantially strain-free, shaped, sintered ceramic fabric preform segments, to the production of the sintered preform segments from novel fixtured, shaped, green ceramic fabric preforms, and to sintered ceramic fiber-reinforced composite articles prepared from the sintered preforms and characterized in that the reinforcement phase is substantially free of mechanical strain, and the fiber in the fabric can exhibit a very small bending radius.

摘要翻译： 本发明涉及从新型夹具，成形，绿色陶瓷织物预制件以及烧结的陶瓷纤维增强复合材料制备烧结预制件段的基本上无应变的成形烧结陶瓷织物预制件段。 预型件，其特征在于加强相基本上没有机械应变，并且织物中的纤维可以呈现非常小的弯曲半径。

公开(公告)号：US06245424B1

公开(公告)日：2001-06-12

申请号：US09113993

申请日：1998-07-10

申请人： Sai-Kwing Lau ,  Salvatore J. Calandra ,  Roger W. Ohnsorg

发明人： Sai-Kwing Lau ,  Salvatore J. Calandra ,  Roger W. Ohnsorg

IPC分类号： B32B900

CPC分类号： B28B1/52 ,  B28B1/265 ,  B28B23/0006 ,  C04B35/565 ,  C04B35/573 ,  C04B35/6263 ,  C04B35/6269 ,  C04B35/62857 ,  C04B35/62865 ,  C04B35/62868 ,  C04B35/62871 ,  C04B35/62873 ,  C04B35/62897 ,  C04B35/806 ,  C04B2235/3821 ,  C04B2235/3826 ,  C04B2235/421 ,  C04B2235/424 ,  C04B2235/48 ,  C04B2235/5244 ,  C04B2235/5248 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/5472 ,  C04B2235/652 ,  C04B2235/661 ,  C04B2235/94 ,  C04B2235/96 ,  C04B2235/9607 ,  C04B2235/9623 ,  C04B2235/963 ,  E21D11/383 ,  E21F16/02 ,  Y10T428/292 ,  Y10T428/2929 ,  Y10T428/2933 ,  Y10T428/2938 ,  Y10T428/30

摘要： This invention relates to a process comprising the steps of: a) providing a fiber preform comprising a non-oxide ceramic fiber with at least one coating, the coating comprising a coating element selected from the group consisting of carbon, nitrogen, aluminum and titanium, and the fiber having a degradation temperature of between 1400° C. and 1450° C., b) impregnating the preform with a slurry comprising silicon carbide particles and between 0.1 wt % and 3 wt % added carbon c) providing a cover mix comprising: i) an alloy comprising a metallic infiltrant and the coating element, and ii) a resin, d) placing the cover mix on at least a portion of the surface of the porous silicon carbide body, e) heating the cover mix to a temperature between 1410° C. and 1450° C. to melt the alloy, and f) infiltrating the fiber preform with the melted alloy for a time period of between 15 minutes and 240 minutes, to produce a ceramic fiber reinforced ceramic composite.

摘要翻译： 本发明涉及一种方法，该方法包括以下步骤：a）提供包含非氧化物陶瓷纤维的至少一层涂层的纤维预制件，所述涂层包括选自碳，氮，铝和钛的涂层元素， 并且所述纤维的降解温度在1400℃和1450℃之间，b）用包含碳化硅颗粒的浆料和0.1重量％至3重量％的添加的碳碳之间浸渍预型体），提供覆盖混合物，其包含：i ）包含金属浸渗剂和涂层元件的合金，以及ii）树脂，d）将覆盖混合物放置在多孔碳化硅体的表面的至少一部分上，e）将覆盖混合物加热至1410° 熔化合金，并且f）用熔融合金浸渍纤维预成型件15分钟至240分钟的时间，以制备陶瓷纤维增强陶瓷复合材料。

公开(公告)号：US06855428B2

公开(公告)日：2005-02-15

申请号：US10452009

申请日：2003-06-02

申请人： Sai-Kwing Lau ,  Salvatore J. Calandra ,  Thomas D. Nixon ,  Edward R. Stover

发明人： Sai-Kwing Lau ,  Salvatore J. Calandra ,  Thomas D. Nixon ,  Edward R. Stover

IPC分类号： F16D65/12 ,  C04B35/628 ,  C04B35/80 ,  F16D69/02 ,  B32B9/04 ,  B32B15/00 ,  B32B31/12

CPC分类号： C04B35/62873 ,  C04B35/6286 ,  C04B35/62894 ,  C04B35/83 ,  C04B2235/3821 ,  C04B2235/5248 ,  C04B2235/5409 ,  C04B2235/5436 ,  C04B2235/616 ,  F16D69/023 ,  F16D2200/0047 ,  Y10T428/249928 ,  Y10T428/24993 ,  Y10T428/30

摘要： The present invention is a composite material and process to produce same. That material comprises a fibrous structure which is initially predominantly coated with elemental carbon; that fibrous structure is then subsequently predominantly coated with at least one ceramic material, e.g., boron carbide, which is non-reactive with silicon. The composite material also comprises a silicon matrix which is continuous and predominantly surrounds the fibrous structure, which has been initially predominantly coated with elemental carbon and subsequently predominantly coated with at least one ceramic material. The matrix which has a fine grain crystalline structure of predominantly 20 microns or less in size. The at least one ceramic material is discontinuous within that matrix. The fibrous material pulls out of the elemental carbon, which initially predominantly coats that fibrous structure, when the composite is subjected to fracture.

摘要翻译： 本发明是一种复合材料及其制造方法。 该材料包括最初主要涂覆有元素碳的纤维结构; 然后该纤维结构随后主要涂覆有至少一种不与硅反应的陶瓷材料，例如碳化硼。 复合材料还包括连续且主要包围纤维结构的硅基质，其最初主要涂覆有元素碳，随后主要涂覆有至少一种陶瓷材料。 具有主要为20微米或更小的细晶粒结晶结构的基体。 所述至少一种陶瓷材料在所述基体内是不连续的。 当复合材料经受断裂时，纤维材料从元素碳中拉出，最初主要涂覆该纤维结构。

公开(公告)号：US5817432A

公开(公告)日：1998-10-06

申请号：US698740

申请日：1996-08-16

申请人： Stephen Chwastiak ,  Sai-Kwing Lau ,  Carl H. McMurtry ,  Gajawalli V. Srinivasan

发明人： Stephen Chwastiak ,  Sai-Kwing Lau ,  Carl H. McMurtry ,  Gajawalli V. Srinivasan

IPC分类号： C04B35/573 ,  C04B35/628 ,  C04B35/80 ,  B32B17/00

CPC分类号： C04B35/62865 ,  C04B35/573 ,  C04B35/624 ,  C04B35/6263 ,  C04B35/62857 ,  C04B35/62868 ,  C04B35/62884 ,  C04B35/62897 ,  C04B35/6316 ,  C04B35/806 ,  C04B2235/3217 ,  C04B2235/3427 ,  C04B2235/3826 ,  C04B2235/46 ,  C04B2235/5244 ,  C04B2235/616 ,  C04B2235/96 ,  Y10T428/2918 ,  Y10T428/2938 ,  Y10T428/2956 ,  Y10T428/2958

摘要： The invention includes a process for producing a reaction bonded silicon carbide composite reinforced with coated silicon carbide fibers which is suitable for high temperature applications. The process includes the steps of coating SiC fibers with AlN, BN or TiB.sub.2 ; treating the coated fibers with a mixture of SiC powder, water and a surfactant; preparing a slurry comprising SiC powder and water; infiltrating the coated fibers with the slurry to form a cast; drying the cast to form a green body; and reaction bonding the green body to form a dense SiC fiber reinforced reaction bonded matrix composite. The invention further includes a SiC fiber reinforced SiC composite comprising a reaction bonded SiC matrix, a SiC fiber reinforcement possessing thermal stability at high temperatures and an interface coating on the fibers having chemical and mechanical compatibility with the SiC matrix and with the SiC fibers.

公开(公告)号：US5589428A

公开(公告)日：1996-12-31

申请号：US464919

申请日：1995-06-05

申请人： Ramesh Divakar ,  Sai-Kwing Lau

发明人： Ramesh Divakar ,  Sai-Kwing Lau

IPC分类号： C04B35/565 ,  C04B35/573 ,  C04B38/00 ,  C04B38/06 ,  F16C33/04 ,  F16C33/24 ,  F16J15/34 ,  C04B35/569 ,  C04B35/576

CPC分类号： C04B35/565 ,  C04B35/62655 ,  C04B35/632 ,  C04B35/634 ,  C04B35/63416 ,  C04B35/63424 ,  C04B35/63432 ,  C04B35/636 ,  C04B38/0074 ,  C04B38/065 ,  C04B38/067 ,  F16C33/043 ,  F16J15/3496 ,  C04B2111/00198 ,  C04B2235/3821 ,  C04B2235/383 ,  C04B2235/3865 ,  C04B2235/428 ,  C04B2235/48 ,  C04B2235/767 ,  C04B2235/77

摘要： Silicon carbide sintered bodies having controlled porosity in the range of about 2 to 12 vol %. in which the pores are generally spherical and about 50 to 500 microns in diameter, are prepared from raw batches containing a polymer fugitive. Sintered bodies in the form of mechanical seal members exhibit lower power consumption at low PV and, in addition, lower wear rates at high PV in comparison to commercially available silicon carbide seal members.

摘要翻译： 具有约2至12体积％范围内的受控孔隙率的碳化硅烧结体。 其中孔通常为球形并且直径为约50至500微米，由含有聚合物短液的原料制备。 机械密封件形式的烧结体在低PV下表现出较低的功率消耗，此外，与市售的碳化硅密封件相比，高PV下的磨损率较低。

公开(公告)号：US5945062A

公开(公告)日：1999-08-31

申请号：US24343

申请日：1998-02-17

申请人： Stephen Chwastiak ,  Sai-Kwing Lau ,  Carl H. McMurtry ,  Gajawalli V. Srinivasan

发明人： Stephen Chwastiak ,  Sai-Kwing Lau ,  Carl H. McMurtry ,  Gajawalli V. Srinivasan

IPC分类号： C04B35/573 ,  C04B35/628 ,  C04B35/80 ,  B28B1/00

CPC分类号： C04B35/62865 ,  C04B35/573 ,  C04B35/624 ,  C04B35/6263 ,  C04B35/62857 ,  C04B35/62868 ,  C04B35/62884 ,  C04B35/62897 ,  C04B35/6316 ,  C04B35/806 ,  C04B2235/3217 ,  C04B2235/3427 ,  C04B2235/3826 ,  C04B2235/46 ,  C04B2235/5244 ,  C04B2235/616 ,  C04B2235/96 ,  Y10T428/2918 ,  Y10T428/2938 ,  Y10T428/2956 ,  Y10T428/2958

摘要： The invention includes a process for producing a reaction bonded silicon carbide composite reinforced with coated silicon carbide fibers which is suitable for high temperature applications. The process includes the steps of coating SiC fibers with AlN, BN or TiB.sub.2 ; treating the coated fibers with a mixture of SiC powder, water and a surfactant; preparing a slurry comprising SiC powder and water; infiltrating the coated fibers with the slurry to form a cast; drying the cast to form a green body; and reaction bonding the green body to form a dense SiC fiber reinforced reaction bonded matrix composite.The invention further includes a SiC fiber reinforced SiC composite comprising a reaction bonded SiC matrix, a SiC fiber reinforcement possessing thermal stability at high temperatures and an interface coating on the fibers having chemical and mechanical compatibility with the SiC matrix and with the SiC fibers.

摘要翻译： 本发明包括一种用于生产适用于高温应用的涂覆碳化硅纤维增强的反应粘合碳化硅复合材料的方法。 该方法包括用AlN，BN或TiB2涂覆SiC纤维的步骤; 用SiC粉末，水和表面活性剂的混合物处理涂覆的纤维; 制备包含SiC粉末和水的浆料; 用浆料渗透涂覆的纤维以形成铸件; 干燥铸造形成一个绿色的身体; 并与生坯反应结合形成致密的SiC纤维增强反应键合基复合材料。 本发明还包括一种SiC纤维增强SiC复合材料，其包括反应结合的SiC基体，在高温下具有热稳定性的SiC纤维增强层和在与SiC基体和SiC纤维具有化学和机械相容性的纤维上的界面涂层。

公开(公告)号：US4981665A

公开(公告)日：1991-01-01

申请号：US185183

申请日：1988-04-22

申请人： Wolfgang D. G. Boecker ,  Stephen Chwastiak ,  Tadeusz M. Korzekwa ,  Sai-Kwing Lau

发明人： Wolfgang D. G. Boecker ,  Stephen Chwastiak ,  Tadeusz M. Korzekwa ,  Sai-Kwing Lau

IPC分类号： C01B31/36 ,  C30B25/00

CPC分类号： B82Y30/00 ,  C01B31/36 ,  C30B25/00 ,  C30B29/60 ,  C01P2004/03 ,  C01P2004/22 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64

摘要： Crystalline silicon carbide wherein at least 90 weight percent of the silicon carbide is formed from a plurality of hexagonal crystal lattices wherein at least 80 weight percent of the crystals formed from the lattices contain at least a portion of opposing parallel base faces separated by a distance of from 0.5 to 20 microns. The crystals may be in the form of separate particles, e.g. separate platelets, or may comprise an intergrown structure. The crystalline silicon carbide of the invention is produced by heating a porous alpha silicon carbide precursor composition comprising silicon and carbon in intimate contact to a temperature of from 2100.degree. C. to 2500.degree. C. in a non-reactive atmosphere. The materials are high performance materials finding use in reinforcing, high temperature thermal insulating, improvement of thermal shock resistance, and modification of electrical properties.

公开(公告)号：US07378362B2

公开(公告)日：2008-05-27

申请号：US10693425

申请日：2003-10-24

申请人： Thomas Dwayne Nixon ,  Sai-Kwing Lau ,  Edward R. Stover ,  Salvatore J. Calandra ,  Vijay V. Pujar ,  Lanny Ritz ,  Gary L. Clark ,  Steve T. Keller

发明人： Thomas Dwayne Nixon ,  Sai-Kwing Lau ,  Edward R. Stover ,  Salvatore J. Calandra ,  Vijay V. Pujar ,  Lanny Ritz ,  Gary L. Clark ,  Steve T. Keller

IPC分类号： C04B35/80 ,  B32B17/12

CPC分类号： C04B35/83 ,  C04B35/565 ,  C04B35/573 ,  C04B35/6263 ,  C04B35/62873 ,  C04B35/62884 ,  C04B35/806 ,  C04B2235/3217 ,  C04B2235/3817 ,  C04B2235/3821 ,  C04B2235/3826 ,  C04B2235/386 ,  C04B2235/3873 ,  C04B2235/401 ,  C04B2235/402 ,  C04B2235/405 ,  C04B2235/421 ,  C04B2235/422 ,  C04B2235/424 ,  C04B2235/428 ,  C04B2235/48 ,  C04B2235/5248 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/614 ,  C04B2235/616 ,  C04B2235/6562 ,  C04B2235/6567 ,  C04B2235/662 ,  C04B2235/728 ,  C04B2235/77 ,  C04B2235/786 ,  C04B2235/80 ,  C04B2235/96 ,  F16D69/023 ,  F16D2200/0047 ,  Y10T428/249928 ,  Y10T428/24993

摘要： The present invention is a composite material, a process and a product formed by the process. The composite is formed by a process that includes forming a fibrous structure comprising fibers into a preform, coating the fibers of the fibrous structure preform with elemental carbon to impregnate that preform, infiltrating the preform with boron carbide to form an impregnated green body. The impregnated green body is infiltrated with liquid naphthalene or other carbon precursor, which is thereafter pyrolyzed to form a carbon char. Then, the char infiltrated green body is infiltrated with molten silicon to form a continuous matrix throughout the composite. The silicon in the continuous matrix is reacted with the carbon char to form silicon carbide.

摘要翻译： 本发明是通过该方法形成的复合材料，工艺和产品。 该复合材料是通过一种方法形成的，该方法包括将包含纤维的纤维结构物形成预成型体，用元素碳涂覆纤维结构预成型体的纤维以浸渍该预成型体，用碳化硼浸渍预型体以形成浸渍的生坯。 浸渍的生坯被液体萘或其他碳前体渗透，然后将其热解形成碳炭。 然后，渗透的木炭浸入熔融的硅中，在整个复合材料中形成连续的基体。 连续基质中的硅与碳炭反应形成碳化硅。

公开(公告)号：US5834387A

公开(公告)日：1998-11-10

申请号：US903251

申请日：1997-07-25

申请人： Ramesh Divakar ,  Sai-Kwing Lau

发明人： Ramesh Divakar ,  Sai-Kwing Lau

IPC分类号： C04B35/565 ,  C04B35/573 ,  C04B38/00 ,  C04B38/06 ,  F16C33/04 ,  F16C33/24 ,  F16J15/34 ,  C04B35/569 ,  C04B35/576

CPC分类号： C04B35/565 ,  C04B35/62655 ,  C04B35/632 ,  C04B35/634 ,  C04B35/63416 ,  C04B35/63424 ,  C04B35/63432 ,  C04B35/636 ,  C04B38/0074 ,  C04B38/065 ,  C04B38/067 ,  F16C33/043 ,  F16J15/3496 ,  C04B2111/00198 ,  C04B2235/3821 ,  C04B2235/383 ,  C04B2235/3865 ,  C04B2235/428 ,  C04B2235/48 ,  C04B2235/767 ,  C04B2235/77

摘要： Silicon carbide sintered bodies having controlled porosity in the range of about 2 to 12 vol %, in which the pores are generally spherical and about 50 to 500 microns in diameter, are prepared from raw batches containing a polymer fugitive. Sintered bodies in the form of mechanical seal members exhibit lower power consumption at low PV and, in addition, lower wear rates at high PV in comparison to commercially available silicon carbide seal members.

摘要翻译： 通过含有聚合物短片的原料制备具有约2至12体积％范围内的控制孔隙率的碳化硅烧结体，其中孔通常为球形并且直径为约50至500微米。 机械密封件形式的烧结体在低PV下表现出较低的功率消耗，此外，与市售的碳化硅密封件相比，高PV下的磨损率较低。