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    Bimodal and multimodal dense boride cermets with low melting point binder
    32.
    发明申请
    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：US20090186211A1

    公开(公告)日：2009-07-23

    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 ,  C04B35/58 ,  C04B35/56

    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。