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公开(公告)号：US12000027B2
公开(公告)日：2024-06-04
申请号：US17772077
申请日：2020-10-29
发明人： Changmin Chun , Ning Ma , Jorge J. Perdomo , John S. Coleman , Larry L. Iaccino
IPC分类号： C22C29/00 , B23K26/34 , C22C30/02 , B23K101/34 , B23K103/16
CPC分类号： C22C29/005 , B23K26/34 , C22C30/02 , B23K2101/35 , B23K2103/166 , C22C2204/00
摘要： Methods and compositions are provided for improving metal dusting corrosion, abrasion resistance and/or erosion resistance for various materials, preferably for applications relating to high-temperature reactors, including dense fluidized bed reactor components. In particular, cermets comprising (a) at least one ceramic phase selected from the group consisting of metal carbides, metal nitrides, metal borides, metal oxides, metal carbonitrides, and mixtures of thereof and (b) at least one metal alloy binder phase are provided. Ceramic phase materials include chromium carbide (Cr23C6). Metal alloy binder phase materials include β-NiAl intermetallic alloys and Ni3Sn2 intermetallic alloys, as well as alloys that contain α-Cr and/or γ′-Ni3Al hard phases. Preferably, bimetallic materials are provided when the cermet compositions are applied using a laser, e.g., a laser cladding method such as high power direct diode (HPDD) laser, or by plasma-based methods such as plasma transfer arc (PTA) welding and powder plasma welding (PPW).
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公开(公告)号：US20220380871A1
公开(公告)日：2022-12-01
申请号：US17772077
申请日：2020-10-29
发明人： Changmin Chun , Ning Ma , Jorge J. Perdomo , John S. Coleman , Larry L. Iaccino
摘要： Methods and compositions are provided for improving metal dusting corrosion, abrasion resistance and/or erosion resistance for various materials, preferably for applications relating to high-temperature reactors, including dense fluidized bed reactor components. In particular, cermets comprising (a) at least one ceramic phase selected from the group consisting of metal carbides, metal nitrides, metal borides, metal oxides, metal carbonitrides, and mixtures of thereof and (b) at least one metal alloy binder phase are provided. Ceramic phase materials include chromium carbide (Cr23C6). Metal alloy binder phase materials include β-NiAl intermetallic alloys and Ni3Sn2 intermetallic alloys, as well as alloys that contain α-Cr and/or γ′-Ni3Al hard phases. Preferably, bimetallic materials are provided when the cermet compositions are applied using a laser, e.g., a laser cladding method such as high power direct diode (HPDD) laser, or by plasma-based methods such as plasma transfer arc (PTA) welding and powder plasma welding (PPW).
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