Plasma spray method and apparatus for applying a coating utilizing particle kinetics

    公开(公告)号:US20050252450A1

    公开(公告)日:2005-11-17

    申请号:US11136336

    申请日:2005-05-24

    Abstract: A method of operation of a plasma torch and the plasma apparatus to produce a hot gas jet stream directed towards a workpiece to be coated by first injecting a cold high pressure carrier gas containing a powder material into a cold main high pressure gas flow and then directing this combined high pressure gas flow coaxially around a plasma exiting from an operating plasma generator and converging directly into the hot plasma effluent, thereby mixing with the hot plasma effluent to form a gas stream with a net temperature based on the enthalpy of the plasma stream and the temperature and volume of the cold high pressure converging gas, establishing a net temperature of the gas stream at a temperature such that the powdered material will not melt or soften, and projecting the powder particles at high velocity onto a workpiece surface. The improvement resides in mixing a cold high pressure carrier gas with powder material entrained in it, with a cold high pressure gas flow of gas prior to mixing this combined gas flow with the plasma effluent which is utilized to heat the combined gas flow to an elevated temperature limited to not exceeding the softening point or melting point of the powder material. The resulting hot high pressure gas flow is directed through a supersonic nozzle to accelerate this heated gas flow to supersonic velocities, thereby providing sufficient velocity to the particles striking the workpiece to achieve a kinetic energy transformation into elastic deformation of the particles as they impact the onto the workpiece surface and forming a dense, tightly adhering cohesive coating. Preferably the powder material is of metals, alloys, polymers and mixtures thereof or with semiconductors or ceramics and the powder material is preferably of a particle size range exceeding 50 microns. The system also includes a rotating member for coating concave surfaces and internal bores or other such devices which can be better coated using rotation.

    Combustion, HVOF spraying of liquid crystal polymer coating on composite, metallic and plastics
    106.
    发明授权
    Combustion, HVOF spraying of liquid crystal polymer coating on composite, metallic and plastics 有权
    燃烧,HVOF喷涂复合材料,金属和塑料上的液晶聚合物涂层

    公开(公告)号:US06793976B2

    公开(公告)日:2004-09-21

    申请号:US10314682

    申请日:2002-12-09

    CPC classification number: B05D1/10 B05D7/14 Y10T428/31504

    Abstract: An embodiment of the present invention provides a protective layer which includes an aggregate of long chain molecules wherein each long chain molecule is randomly oriented and consistently entangled to adjacent long chain molecules throughout the aggregate of long chain molecules. Additionally, the layer is essentially free from voids and essentially free from residual stresses. By way of example and not limitation, the long chain molecule may be a plastic or liquid crystal polymer. Additionally, a method for forming the protective layer is disclosed herein. The method includes the steps of disposing an aggregate of long chain molecules in a liquid state onto a substrate such that each long chain molecule is randomly oriented, maintaining the liquid state of the aggregate of long chain molecules such that each long chain molecule is consistently entangled to adjacent long chain molecules throughout the aggregate of long chain molecules, and solidifying the aggregate of long chain molecules from the liquid state to a solid state.

    Abstract translation: 本发明的一个实施方案提供了一种保护层,其包括长链分子的聚集体,其中每个长链分子是随机取向的并且一贯地缠绕在长链分子的整个聚集体中的相邻长链分子。 此外,该层基本上没有空隙并且基本上没有残余应力。 作为实例而非限制,长链分子可以是塑料或液晶聚合物。 此外,本文公开了形成保护层的方法。 该方法包括以下步骤:将处于液态的长链分子的聚集体放置到基底上,使得每个长链分子被随机取向,保持长链分子的聚集体的液态,使得每个长链分子一致缠结 到长链分子的整个聚集体中的相邻长链分子,并将长链分子的聚集体从液态固化成固态。

    Method of producing a coating using a kinetic spray process with large particles and nozzles for the same
    108.
    发明授权
    Method of producing a coating using a kinetic spray process with large particles and nozzles for the same 失效
    使用具有大颗粒和喷嘴的动力喷雾法生产涂层的方法

    公开(公告)号:US06623796B1

    公开(公告)日:2003-09-23

    申请号:US10117704

    申请日:2002-04-05

    CPC classification number: C23C24/04 B05B7/1486 B05B7/1613 B05D1/10 B05D1/12

    Abstract: A method of depositing large particles having an average nominal diameter of greater than 106 microns up to 250 microns onto substrates using a kinetic spray system is disclosed. The method utilizes a powder injector tube having a reduced inner diameter and a de Laval type nozzle having an elongated throat to exit end length. The method permits deposition of much larger particles than previously possible.

    Abstract translation: 公开了一种使用动力喷雾系统将平均公称直径大于106微米至250微米的大颗粒沉积到基底上的方法。 该方法利用具有减小的内径的粉末注射器管和具有延长的喉部以退出端部长度的德拉瓦尔型喷嘴。 该方法允许沉积比先前可能的更大的颗粒。

    Method of coating a substrate using a thermosetting basecoat composition and a thermoplastic top coat composition
    109.
    发明授权
    Method of coating a substrate using a thermosetting basecoat composition and a thermoplastic top coat composition 失效
    使用热固性底漆组合物和热塑性面漆组合物涂布基材的方法

    公开(公告)号:US06544596B2

    公开(公告)日:2003-04-08

    申请号:US09994787

    申请日:2001-11-28

    Abstract: A coating system comprises a basecoat of an thermosetting asphalt extended, chemically cross linked—urethane/epoxy hybrid basecoat resting on a substrate, preferably a porous substrate such as concrete or wood that off-gas when coated with a thermoplastic material; and a thermoplastic powder coating topcoat overlying at least the base coat. The thermosetting basecoat composition consisting essentially of, in weight percent based on final formulation, and between 10 and 90% of a petroleum asphalt; between 10 and 90%, of a hydroxy-terminated homopolymer; and between 0.1 and 30% of a functional epoxy reactive diluent for reducing the viscosity of the composition; and further up to 5% of a surfactant for improving surface imperfections, up to 5% of an anti-oxidant; and up to 25% of a thickening agent.

    Abstract translation: 一种涂层系统包括一个热固性沥青延伸的化学交联的聚氨酯/环氧混合底漆的底涂层,该底涂层放置在基材上,优选多孔基材例如混凝土或木材,当涂覆有热塑性材料时,该废气被排出。 和至少覆盖底涂层的热塑性粉末涂料面漆。 热固性底漆组合物基本上由以最终配方为基准的重量百分数和10至90%的石油沥青组成; 10至90%的羟基封端的均聚物; 和0.1至30%的功能性环氧反应性稀释剂,用于降低组合物的粘度; 进一步高达5%的用于改善表面缺陷的表面活性剂,高达5%的抗氧化剂; 和至多25%的增稠剂。

    Engineered composite system, system component compositions, and methods of use
    110.
    发明申请
    Engineered composite system, system component compositions, and methods of use 失效
    工程复合系统,系统部件组成和使用方法

    公开(公告)号:US20020114940A1

    公开(公告)日:2002-08-22

    申请号:US09994787

    申请日:2001-11-28

    Abstract: A coating system comprises a basecoat of an thermosetting asphalt extended, chemically cross linkednullurethane/epoxy hybrid basecoat resting on a substrate, preferably a porous substrate such as concrete or wood that off-gas when coated with a thermoplastic material; and a thermoplastic powder coating topcoat overlying at least the base coat. The thermosetting basecoat composition consisting essentially of, in weight percent based on final formulation, and between 10 and 90% of a petroleum asphalt; between 10 and 90%, of a hydroxy-terminated homopolymer; and between 0.1 and 30% of a functional epoxy reactive diluent for reducing the viscosity of the composition; and further up to 5% of a surfactant for improving surface imperfections, up to 5% of an anti-oxidant; and up to 25% of a thickening agent.

    Abstract translation: 一种涂层系统包括一个热固性沥青延伸的化学交联的聚氨酯/环氧混合底漆的底涂层,该底涂层放置在基材上,优选多孔基材例如混凝土或木材,当涂覆有热塑性材料时,该废气被排出。 和至少覆盖底涂层的热塑性粉末涂料面漆。 热固性底漆组合物基本上由以最终配方为基准的重量百分数和10至90%的石油沥青组成; 10至90%的羟基封端的均聚物; 和0.1至30%的功能性环氧反应性稀释剂,用于降低组合物的粘度; 进一步高达5%的用于改善表面缺陷的表面活性剂,高达5%的抗氧化剂; 和至多25%的增稠剂。

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