Invention Grant
US07731776B2 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
- Patent Title: Bimodal and multimodal dense boride cermets with superior erosion performance
- Patent Title (中): 具有优良侵蚀性能的双峰和多峰密集硼化物金属陶瓷
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Application No.: US11293728Application Date: 2005-12-02
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Publication No.: US07731776B2Publication Date: 2010-06-08
- Inventor: 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
- Applicant: 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
- Applicant Address: US NJ Annandale
- Assignee: ExxonMobil Research and Engineering Company
- Current Assignee: ExxonMobil Research and Engineering Company
- Current Assignee Address: US NJ Annandale
- Agent Robert A. Migliorini
- Main IPC: C22C29/14
- IPC: C22C29/14 ; B22F3/16

Abstract:
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.
Public/Granted literature
- US20070128066A1 Bimodal and multimodal dense boride cermets with superior erosion performance Public/Granted day:2007-06-07
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