利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

97 条记录 (耗时 0.028 秒)

    Bimodal and multimodal dense boride cermets with low melting point binder
    1.
    发明授权
    Bimodal and multimodal dense boride cermets with low melting point binder 有权
    具有低熔点粘合剂的双峰和多峰致密硼化物金属陶瓷

    公开(公告)号：US08323790B2

    公开(公告)日：2012-12-04

    申请号：US12291899

    申请日：2008-11-14

    申请人： ChangMin Chun ,  Narasimha-Rao Venkata Bangaru

    发明人： ChangMin Chun ,  Narasimha-Rao Venkata Bangaru

    IPC分类号： B32B18/00 ,  C04B35/00 ,  C22C32/00

    CPC分类号： C22C29/14 ,  B22F1/0014 ,  C22C29/005 ,  Y10T428/252

    摘要： Multimodal cermet compositions having lower melting point metal binders and methods of making are provided. The multimodal cermet compositions having a low melting point metal binder include: a) a ceramic phase, and b) a low melting point metal binder phase, wherein the ceramic phase is a metal boride with a multimodal distribution of particles, wherein the metal of the metal boride is chosen from Group IV, Group V, Group VI elements of the Long Form of the Periodic Table of Elements, and mixtures thereof, and wherein the low melting metal binder phase is represented by the formula (DEF), wherein D is a base metal chosen from Fe, Ni, Co, Mn and mixtures thereof, E is an alloying metal comprising Cr, Si, and B, and F is an alloying element chosen from C, N, P, Al, Ga, Ge, As, In, Sn, Sb, Pb, Sc, La, Y, Ce, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Re, Ru, Rh, Ir, Pd, Pt, Cu, Ag, Au and mixtures thereof, and wherein said low melting metal binder phase has a melting point less than 1250° C. The multimodal cermet compositions having a low melting point metal binder may be formed by a powder metallurgy process or an infiltration process. One or more advantages of the multimodal cermets with low melting point binder are high packing density of the ceramic phase, high fracture toughness, and improved erosion resistance at high temperatures up to 1000° C. The multimodal cermets with low melting point binder are suitable in high temperature erosion/corrosion applications in various chemical and petroleum environments.

    摘要翻译： 提供了具有较低熔点金属粘合剂和制备方法的多模金属陶瓷组合物。 具有低熔点金属粘合剂的多峰金属陶瓷组合物包括：a）陶瓷相，和b）低熔点金属粘结相，其中所述陶瓷相是具有多峰分布的颗粒的金属硼化物，其中所述金属 金属硼化物选自元素周期表的长形式的IV族，V族，VI族元素及其混合物，其中低熔点金属粘结相由式（DEF）表示，其中D为 选自Fe，Ni，Co，Mn及其混合物的贱金属，E是包含Cr，Si和B的合金金属，F是选自C，N，P，Al，Ga，Ge，As， In，Sn，Sb，Pb，Sc，La，Y，Ce，Ti，Zr，Hf，V，Nb，Ta，Mo，W，Re，Ru，Rh，Ir，Pd，Pt，Cu，Ag，Au和 其混合物，其中所述低熔点金属粘结相的熔点低于1250℃。具有低熔点金属粘合剂的多峰金属陶瓷组合物可以通过粉末冶金法 ess或渗透过程。 具有低熔点粘合剂的多峰金属陶瓷的一个或多个优点是陶瓷相的高填充密度，高断裂韧性和在高达1000℃的高温下改善的耐冲蚀性。具有低熔点粘合剂的多峰金属陶瓷适合于 各种化学和石油环境中的高温侵蚀/腐蚀应用。

    Bimodal and multimodal dense boride cermets with superior erosion performance
    5.
    发明授权
    Bimodal and multimodal dense boride cermets with superior erosion performance 失效
    具有优良侵蚀性能的双峰和多峰密集硼化物金属陶瓷

    公开(公告)号：US07731776B2

    公开(公告)日：2010-06-08

    申请号：US11293728

    申请日：2005-12-02

    申请人： ChangMin Chun ,  Narasimha-Rao V. Bangaru ,  Neeraj S. Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John R. Peterson ,  Robert L. Antram ,  Christopher J. Fowler ,  Emery B. Lendvai-Lintner

    发明人： ChangMin Chun ,  Narasimha-Rao V. Bangaru ,  Neeraj S. Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John R. Peterson ,  Robert L. Antram ,  Christopher J. Fowler ,  Emery B. Lendvai-Lintner

    IPC分类号： C22C29/14 ,  B22F3/16

    CPC分类号： C22C29/14 ,  B22F1/0014 ,  B22F2009/043 ,  B22F2998/10 ,  B22F2999/00 ,  Y10T428/12007 ,  B22F1/0003 ,  B22F3/02 ,  B22F3/1021 ,  B22F3/1035 ,  B22F9/04

    摘要： Multimodal cermet compositions comprising a multimodal grit distribution of the ceramic phase and method of making are provided by the present invention. The multimodal cermet compositions include a) a ceramic phase and b) a metal binder phase, wherein the ceramic phase is a metal boride with a multimodal distribution of particles, wherein at least one metal is selected from the group consisting of Group IV, Group V, Group VI elements of the Long Form of The Periodic Table of Elements and mixtures thereof, and wherein the metal binder phase comprises at least one first element selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, and at least second element selected from the group consisting of Cr, Al, Si and Y, and Ti. The method of making multimodal boride cermets includes the steps of mixing multimodal ceramic phase particles and metal phase particles, milling the ceramic and metal phase particles, uniaxially and optionally isostatically pressing the particles, liquid phase sintering of the compressed mixture at elevated temperatures, and finally cooling the multimodal cermet composition. Advantages disclosed by the multimodal cermets are high packing density of the ceramic phase, high fracture toughness and improved erosion resistance at high temperatures up to 1000° C. The disclosed multimodal cermets are suitable in high temperature erosion/corrosion applications in various chemical and petroleum environments.

    摘要翻译： 包含陶瓷相的多峰砂粒分布的多模金属陶瓷组合物及其制造方法由本发明提供。 多峰金属陶瓷组合物包括a）陶瓷相和b）金属粘结相，其中所述陶瓷相是具有多峰颗粒分布的金属硼化物，其中至少一种金属选自第IV族，第V族 元素周期表的Long形式的VI族元素及其混合物，其中金属粘合剂相包含至少一种选自Fe，Ni，Co，Mn及其混合物的第一元素，至少 选自Cr，Al，Si和Y的第二元素和Ti。 制备多峰硼化物金属陶瓷的方法包括以下步骤：将多峰陶瓷相颗粒和金属相颗粒混合，研磨陶瓷和金属相颗粒，单轴和任选地等压挤压颗粒，在高温下液相烧结压缩混合物，最后 冷却多峰金属陶瓷组合物。 多峰金属陶瓷的优点是陶瓷相的高填充密度，高断裂韧性和在高达1000℃的高温下的耐腐蚀性得到改善。所公开的多峰金属陶瓷适用于各种化学和石油环境中的高温侵蚀/腐蚀应用 。

    High performance alloys with improved metal dusting corrosion resistance
    9.
    发明申请
    High performance alloys with improved metal dusting corrosion resistance 审中-公开
    具有改善金属除尘耐腐蚀性能的高性能合金

    公开(公告)号：US20080199349A1

    公开(公告)日：2008-08-21

    申请号：US12069289

    申请日：2008-02-08

    申请人： ChangMin Chun ,  Trikur A. Ramanarayanan

    发明人： ChangMin Chun ,  Trikur A. Ramanarayanan

    IPC分类号： C22C30/00

    CPC分类号： C23C4/02 ,  C23C28/042 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12931 ,  Y10T428/12944 ,  Y10T428/12951

    摘要： Alloy compositions which are resistant to metal dusting corrosion are provided by the present invention. Also provided are methods for preventing metal dusting on metal surfaces exposed to carbon supersaturated environments. The alloy compositions include an alloy (PQR), and a multi-layer oxide film on the surface of the alloy (PQR). The alloy (PQR) includes a metal (P) selected from the group consisting of Fe, Ni, Co, and mixtures thereof, an alloying metal (Q) comprising Cr, Mn, and either Al, Si, or Al/Si, and an alloying element (R). When the alloying metal (Q) includes Al, the multi-layer oxide film on the surface of the alloy includes at least three oxide layers. When the alloying metal (Q) includes Si, the multi-layer oxide film on the surface of the alloy (PQR) includes at least four oxide layers. When the alloying metal (Q) includes Al and Si, the multi-layer oxide film on the surface of the alloy (PQR) includes at least three oxide layers. The multi-layer oxide film is formed in situ during use of the alloy composition in a carbon supersaturated metal dusting environment. Advantages exhibited by the disclosed alloy compositions include improved metal dusting corrosion resistance at high temperatures in carbon-supersaturated environments having relatively low oxygen partial pressures. The disclosed alloy compositions are suitable for use as the inner surfaces in reactor systems and refinery apparatus.

    摘要翻译： 耐金属粉尘腐蚀的合金组合物由本发明提供。 还提供了防止金属表面暴露于碳过饱和环境的金属粉尘的方法。 合金组合物包括合金（PQR）和合金表面上的多层氧化膜（PQR）。 合金（PQR）包括选自Fe，Ni，Co及其混合物的金属（P），包含Cr，Mn以及Al，Si或Al / Si的合金金属（Q），以及 合金元素（R）。 当合金金属（Q）包括Al时，合金表面上的多层氧化物膜包括至少三个氧化物层。 当合金金属（Q）包含Si时，合金表面上的多层氧化物膜（PQR）包括至少四个氧化物层。 当合金金属（Q）包括Al和Si时，合金表面上的多层氧化物膜（PQR）包括至少三个氧化物层。 在碳过饱和金属粉尘环境中的合金组合物的使用期间，多层氧化物膜原位形成。 所公开的合金组合物显示的优点包括在具有相对低的氧分压的碳过饱和环境中的高温下改善的金属粉尘耐腐蚀性。 所公开的合金组合物适用于反应器系统和炼油设备中的内表面。