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    • 1. 发明授权
    • Apparatus for bonding a particle material to near theoretical density
    • 用于将颗粒材料粘合到接近理论密度的装置
    • US06309591B1
    • 2001-10-30
    • US09412518
    • 1999-10-05
    • Sang H. YooKrupashankara M. SethuramTirumalai S. Sudarshan
    • Sang H. YooKrupashankara M. SethuramTirumalai S. Sudarshan
    • B22F314
    • B22F3/093B22F3/14B22F2999/00C04B35/64Y10S29/031Y10S977/775Y10S977/776B22F3/105
    • An apparatus for bonding a particle material to near theoretical density, includes a chamber, a punch and die assembly for supporting a particle material, plungers for applying shear and/or axial pressures, and a power supply for applying a current. In the first stage, a pulsed current of about 1 to 20,000 amps., is applied to the particle material for a predetermined time period, and substantially simultaneously therewith, a shear force of about 5-50 MPa is applied. In the second stage, an axial pressure of about less than 1 to 2,000 MPa is applied to the particle material for a predetermined time period, and substantially simultaneously therewith, a steady current of about 1 to 20,000 amps. is applied. The apparatus may be used to bond metallic, ceramic, intermetallic and composite materials to near-net shape, directly from precursors or elemental particle material without the need for synthesizing the material. The method may also be applied to perform combustion synthesis of a reactive material, followed by consolidation or joining to near-net shaped articles or parts. The apparatus may further be used to repair a damaged or worn substrate or part, coat a particle onto a substrate, and grow single crystals of a particle material.
    • 用于将颗粒材料粘合到接近理论密度的装置包括用于支撑颗粒材料的腔室,冲头和模具组件,用于施加剪切和/或轴向压力的柱塞以及用于施加电流的电源。 在第一阶段中,将约1至20,000安培的脉冲电流施加到颗粒材料预定时间段,并且基本同时施加约5-50MPa的剪切力。 在第二阶段中,将大约小于1至2,000MPa的轴向压力施加到颗粒材料预定时间段,并且基本同时施加约1至20,000安培的稳定电流。 被申请;被应用。 该装置可用于将金属,陶瓷,金属间和复合材料直接从前体或元素颗粒材料粘合到近净形状,而不需要合成材料。 该方法还可以用于进行反应性材料的燃烧合成,随后固化或接合到近净形状的制品或部件。 该装置还可用于修复损坏或磨损的基底或部件,将颗粒涂覆到基底上,并生长颗粒材料的单晶。
    • 6. 发明授权
    • Apparatus for bonding a particle material to near theoretical density
    • 用于将颗粒材料粘合到接近理论密度的装置
    • US5989487A
    • 1999-11-23
    • US274878
    • 1999-03-23
    • Sang H. YooKrupashankara M. SethuramTirumalai S. Sudarshan
    • Sang H. YooKrupashankara M. SethuramTirumalai S. Sudarshan
    • B22F3/00B22F3/035B22F3/093B22F3/14C04B35/64B22F3/12
    • B22F3/093B22F3/14C04B35/64B22F2999/00Y10S29/031Y10S977/775Y10S977/776
    • An apparatus for bonding a particle material to near theoretical density, includes a chamber, a punch and die assembly for supporting a particle material, plungers for applying shear and/or axial pressures, and a power supply for applying a current. In the first stage, a pulsed current of about 1 to 20,000 amps., is applied to the particle material for a predetermined time period, and substantially simultaneously therewith, a shear force of about 5-50 MPa is applied. In the second stage, an axial pressure of about less than 1 to 2,000 MPa is applied to the particle material for a predetermined time period, and substantially simultaneously therewith, a steady current of about 1 to 20,000 amps. is applied. The apparatus may be used to bond metallic, ceramic, intermetallic and composite materials to near-net shape, directly from precursors or elemental particle material without the need for synthesizing the material. The method may also be applied to perform combustion synthesis of a reactive material, followed by consolidation or joining to near-net shaped articles or parts. The apparatus may further be used to repair a damaged or worn substrate or part, coat a particle onto a substrate, and grow single crystals of a particle material.
    • 用于将颗粒材料粘合到接近理论密度的装置包括用于支撑颗粒材料的腔室,冲头和模具组件,用于施加剪切和/或轴向压力的柱塞以及用于施加电流的电源。 在第一阶段中,将约1至20,000安培的脉冲电流施加到颗粒材料预定时间段,并且基本同时施加约5-50MPa的剪切力。 在第二阶段中,将大约小于1至2,000MPa的轴向压力施加到颗粒材料预定时间段,并且基本同时施加约1至20,000安培的稳定电流。 被申请;被应用。 该装置可用于将金属,陶瓷,金属间和复合材料直接从前体或元素颗粒材料粘合到近净形状,而不需要合成材料。 该方法还可以用于进行反应性材料的燃烧合成,随后固化或接合到近净形状的制品或部件。 该装置还可用于修复损坏或磨损的基底或部件,将颗粒涂覆到基底上,并生长颗粒材料的单晶。