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Erosion–Corrosion‐Resistant Titanium Diboride Cermets for High‐Temperature Process Applications
Author(s) -
Chun Chang Min,
Bangaru NarasimhaRao V.,
Thirumalai Neeraj,
Peterson John R.,
Fowler Christopher J.,
Antram Robert L.
Publication year - 2008
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02217.x
Subject(s) - materials science , cermet , metallurgy , corrosion , spall , microstructure , service life , erosion , erosion corrosion , high temperature corrosion , fracture toughness , toughness , cracking , composite material , ceramic , biology , paleontology
Reactor vessels and internals used for high‐temperature processes such as in refining and chemical industries are exposed to aggressive fluids often containing hard catalyst particles moving at high velocities. The protection of these vessels and internals against erosion‐ and corrosion‐induced material degradation is a technological challenge. The life span of the state–of‐the‐art monolithic refractory liners currently in use is limited by excessive mechanical attrition of the liner from high‐velocity solid particle impingement, mechanical cracking, and spalling. The advanced TiB 2 ‐stainless‐steel (SS) cermets are designed for chemical stability required for long‐term service and offer an order of magnitude higher erosion resistance over the state‐of‐the‐art, high fracture toughness ( K 1 C ∼12 MPa m 1/2 ) and excellent corrosion resistance ( k p ∼1.9 × 10 −11 g 2 /cm 4 /s at 800°C in air). Materials, design, microstructure, key mechanical properties, erosion, and corrosion resistance of the newly developed TiB 2 ‐SS cermets are presented.