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    • 3. 发明申请
    • Cement-graphite composite materials for vibration damping
    • 用于减震的水泥石墨复合材料
    • US20110120347A1
    • 2011-05-26
    • US12624979
    • 2009-11-24
    • Deborah D. L. ChungSivaraja Muthusamy
    • Deborah D. L. ChungSivaraja Muthusamy
    • C04B28/26
    • C04B7/527C04B28/02C04B2111/2046C04B14/024C04B40/0259C04B40/0286
    • This invention provides a material for vibration damping, said material comprising a composite, said composite comprising a cement matrix, and exfoliated graphite that is distributed in said composite. Said cement is preferably hydraulic cement containing calcium silicate. Said exfoliated graphite exhibits a morphology that enables the physical units of exfoliated graphite to connect mechanically. The proportion of exfoliated graphite in the composite is high enough for the exfoliated graphite to connect mechanically in the presence of cement. The proportion of cement in the composite is high enough for the cement to form a continuous matrix in the composite. This invention also provides a material for vibration damping, said material comprising a composite, said composite comprising a continuous cement matrix and a graphite network, said network being mechanically connected. In addition, this invention provides a method for making a material for vibration damping, said method comprising compressing a mixture of exfoliated graphite and cement particles at a pressure that is sufficient to cause the exfoliated graphite to bind the cement particles through mechanical connection between the physical units of exfoliated graphite, and curing the cement in the presence of water that is adequate for the cement particles to bond cementitiously to one another.
    • 本发明提供了一种用于减震的材料,所述材料包括复合材料,所述复合材料包括水泥基质和分散在所述复合材料中的剥离石墨。 所述水泥优选含有硅酸钙的水硬性水泥。 所述剥离石墨表现出使剥离石墨的物理单元机械连接的形态。 复合材料中剥离石墨的比例足够高,使得剥离石墨在水泥存在下机械连接。 水泥在复合材料中的比例足够高,使得水泥在复合材料中形成连续的基体。 本发明还提供了一种用于减振的材料,所述材料包括复合材料,所述复合材料包括连续的水泥基质和石墨网络,所述网络机械连接。 此外,本发明提供了一种用于制造用于减振的材料的方法,所述方法包括在足以使剥离的石墨通过物理上的机械连接使粘合剂颗粒结合的压力下压缩剥离的石墨和水泥颗粒的混合物 单位的剥离石墨,并且在水存在下固化水泥,其足以使水泥颗粒彼此粘结粘结。
    • 4. 发明授权
    • Particulate carbon complex
    • 颗粒碳复合物
    • US5643670A
    • 1997-07-01
    • US099863
    • 1993-07-29
    • Deborah D. L. Chung
    • Deborah D. L. Chung
    • C04B20/00C04B41/45C04B41/52D01F9/127G01N27/30H01M4/62H01M4/96H01M8/18B32B9/00
    • B82Y30/00C04B20/0056C04B41/4596C04B41/52D01F9/127G01N27/308H01M4/624H01M4/96C04B2111/00612H01M8/188Y02E60/528Y10T428/2918Y10T428/2935Y10T428/2975Y10T428/30Y10T428/31529
    • The present invention relates to a particulate carbon complex made from a porous, particulate carbon substrate and a plurality of carbon filaments each having a first end attached to the porous, particulate carbon substrate and a second end distal from substrate. The complex is capable of transferring electrical current at a density of 350 to 10,000 mA/cm.sup.2 for a Fe.sup.+2 /Fe.sup.+3 oxidation/reduction electrochemical reaction couple carried out in an aqueous electrolyte solution containing 6 mM potassium ferrocyanide and 1M potassium nitrate. The complex is prepared by providing a porous, particulate carbon substrate with impregnated metal catalyst and contacting the substrate with a gaseous carbonaceous material under conditions effective to form a plurality of carbon filaments on the substrate. Generally, the complex includes particles of metal catalyst material at the end of the filaments distal from the substrate. The carbon complex is useful in electrochemical applications as well as in structural composites.
    • 本发明涉及一种由多孔,颗粒状碳基底和多个碳丝制成的颗粒状碳复合体,每个碳丝具有连接到多孔颗粒碳基底的第一端和远离基底的第二端。 对于在含有6mM亚铁氰化钾和1M硝酸钾的含水电解质溶液中进行的Fe + 2 / Fe + 3氧化还原电化学反应耦合,该复合体能够以350至10,000mA / cm 2的密度转印电流。 通过提供具有浸渍的金属催化剂的多孔,颗粒状碳底物并在有效在基材上形成多个碳丝的条件下使基材与气态含碳材料接触来制备复合物。 通常,复合物包括在远离基底的细丝末端的金属催化剂材料的颗粒。 碳复合物可用于电化学应用以及结构复合材料。
    • 8. 发明授权
    • Methods and sensors for detecting strain and stress
    • 检测应变和应力的方法和传感器
    • US6079277A
    • 2000-06-27
    • US990062
    • 1997-12-12
    • Deborah D. L. Chung
    • Deborah D. L. Chung
    • G01B7/16G01L1/20
    • G01L1/20G01B7/18
    • The present invention relates to strain or stress sensors which include a first planar conductive element, a second planar conductive element, and a flexible graphite sheet sandwiched between the first and second planar conductive elements. The flexible graphite sheet includes a mass of expanded graphite particles compressed together in the absence of a binder. Prior to compression, the expanded graphite particles have a c direction dimension which is at least 80 times that of the graphite particles from which the expanded particles are formed. The sensor is configured so that compression of the sensor causes a change in resistance which can be correlated to strain or stress. The present invention also relates to a strain or stress sensor which includes a polymeric composite, a first electrically conductive lead connected to a first point on or in the polymeric composite, and a second electrically conductive lead connected to a second point on or in the polymeric composite. The polymeric composite includes a polymeric matrix material and carbon filaments having diameters of from about 0.01 .mu.m to about 1.0 .mu.m dispersed therein. Methods for detecting strain or stress are also disclosed.
    • 本发明涉及包括第一平面导电元件,第二平面导电元件和夹在第一和第二平面导电元件之间的柔性石墨片的应变或应力传感器。 柔性石墨片包括在不存在粘合剂的情况下压缩在一起的大量膨胀石墨颗粒。 在压缩之前,膨胀石墨颗粒的c方向尺寸是形成发泡颗粒的石墨颗粒的至少80倍。 传感器被配置为使得传感器的压缩导致电阻变化,其可以与应变或应力相关。 本发明还涉及一种应变或应力传感器,其包括聚合复合材料,连接到聚合物复合材料上或聚合物复合材料中的第一点的第一导电引线,以及连接到聚合物上或聚合物中的第二点的第二导电引线 综合。 聚合物复合材料包括分散在其中的直径为约0.01μm至约1.0μm的聚合物基体材料和碳丝。 还公开了用于检测应变或应力的方法。
    • 9. 发明授权
    • Composite material strain/stress sensor
    • 复合材料应变/应力传感器
    • US5817944A
    • 1998-10-06
    • US819919
    • 1997-03-18
    • Deborah D. L. Chung
    • Deborah D. L. Chung
    • G01B7/16G01L1/20G01L1/00
    • G01L1/20G01B7/18
    • A new strain/stress sensor based on the concept of reversible crack opening in a composite material. Crack opening increases the electrical resistance, which is the signal provided by the sensor. The new technology is manifested in concrete and mortar containing electrically conducting short fibers (e.g., carbon fibers and steel fibers). Carbon fibers serve to greatly decrease the crack height so that apparently reversible crack opening occurs. The crack opening is accompanied by fiber pull-out, resulting in fiber-matrix contact resistivity increase, thus allowing sensing under cyclic as well as static loading. A part of the resistance change is irreversible, so it provides memory of the first deformation.
    • 基于复合材料中可逆裂纹开口概念的新型应变/应力传感器。 裂纹开口增加了电阻,这是由传感器提供的信号。 新技术体现在含有导电短纤维(例如碳纤维和钢纤维)的混凝土和砂浆中。 碳纤维用于大大降低裂纹高度,从而出现明显可逆的裂纹开口。 裂纹开口伴随着光纤拉出,导致纤维基质接触电阻率增加,从而允许在循环和静态负载下进行感测。 电阻变化的一部分是不可逆转的,因此它提供了第一次变形的记忆。