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    Bimodal and multimodal dense boride cermets with superior erosion performance
    3.
    发明申请
    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：US20070128066A1

    公开(公告)日：2007-06-07

    申请号：US11293728

    申请日：2005-12-02

    申请人： ChangMin Chun ,  Narasimha-Rao Bangaru ,  Neeraj Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler ,  Emery Lendvai-Lintner

    发明人： ChangMin Chun ,  Narasimha-Rao Bangaru ,  Neeraj Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler ,  Emery Lendvai-Lintner

    IPC分类号： C22C29/14

    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 。